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Publisher: RMIT Publishing   (Total: 400 journals)

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Showing 1 - 200 of 400 Journals sorted alphabetically
40 [degrees] South     Full-text available via subscription   (Followers: 2)
Aboriginal and Islander Health Worker J.     Full-text available via subscription   (Followers: 14)
Aboriginal Child at School     Full-text available via subscription   (Followers: 5)
About Performance     Full-text available via subscription   (Followers: 11)
Access     Full-text available via subscription   (Followers: 25)
ACCESS: Critical Perspectives on Communication, Cultural & Policy Studies     Full-text available via subscription   (Followers: 9)
Accounting, Accountability & Performance     Full-text available via subscription   (Followers: 16)
ACORN : The J. of Perioperative Nursing in Australia     Full-text available via subscription   (Followers: 17, SJR: 0.103, h-index: 4)
Adelaide Law Review     Full-text available via subscription   (Followers: 19)
Advocate: Newsletter of the National Tertiary Education Union     Full-text available via subscription   (Followers: 1)
Agenda: A J. of Policy Analysis and Reform     Full-text available via subscription   (Followers: 1)
Agora     Full-text available via subscription   (Followers: 3)
Agricultural Commodities     Full-text available via subscription   (SJR: 0.102, h-index: 8)
Agricultural Science     Full-text available via subscription   (Followers: 2)
AIMA Bulletin     Full-text available via subscription   (Followers: 4)
AJP : The Australian J. of Pharmacy     Full-text available via subscription   (Followers: 10, SJR: 0.102, h-index: 5)
Analysis     Full-text available via subscription   (Followers: 3)
Ancient History : Resources for Teachers     Full-text available via subscription   (Followers: 4)
Anglican Historical Society J.     Full-text available via subscription   (Followers: 3)
Annals of the Royal Australasian College of Dental Surgeons     Full-text available via subscription   (Followers: 4, SJR: 0.101, h-index: 11)
ANZSLA Commentator, The     Full-text available via subscription   (Followers: 3)
Appita J.: J. of the Technical Association of the Australian and New Zealand Pulp and Paper Industry     Full-text available via subscription   (Followers: 14, SJR: 0.18, h-index: 27)
AQ - Australian Quarterly     Full-text available via subscription  
Arena J.     Full-text available via subscription   (Followers: 1)
Around the Globe     Full-text available via subscription   (Followers: 1)
Art + Law     Full-text available via subscription   (Followers: 12)
Art Monthly Australia     Full-text available via subscription   (Followers: 10)
Artefact : the journal of the Archaeological and Anthropological Society of Victoria     Full-text available via subscription   (Followers: 3)
Artlink     Full-text available via subscription   (Followers: 5)
Asia Pacific J. of Clinical Nutrition     Full-text available via subscription   (Followers: 10, SJR: 0.672, h-index: 51)
Asia Pacific J. of Health Management     Full-text available via subscription   (Followers: 3)
Aurora J.     Full-text available via subscription  
Australasian Biotechnology     Full-text available via subscription   (Followers: 1, SJR: 0.1, h-index: 8)
Australasian Catholic Record, The     Full-text available via subscription   (Followers: 5)
Australasian Drama Studies     Full-text available via subscription   (SJR: 0.101, h-index: 2)
Australasian Epidemiologist     Full-text available via subscription  
Australasian Historical Archaeology     Full-text available via subscription   (Followers: 7)
Australasian J. of Early Childhood     Full-text available via subscription   (Followers: 4, SJR: 0.174, h-index: 1)
Australasian J. of Gifted Education     Full-text available via subscription   (Followers: 5, SJR: 0.115, h-index: 3)
Australasian J. of Human Security, The     Full-text available via subscription   (Followers: 1)
Australasian J. of Irish Studies, The     Full-text available via subscription   (Followers: 8)
Australasian J. of Regional Studies, The     Full-text available via subscription   (Followers: 1)
Australasian Law Management J.     Full-text available via subscription   (Followers: 7)
Australasian Leisure Management     Full-text available via subscription   (Followers: 1)
Australasian Musculoskeletal Medicine     Full-text available via subscription   (Followers: 3)
Australasian Music Research     Full-text available via subscription   (Followers: 4)
Australasian Parks and Leisure     Full-text available via subscription   (Followers: 2)
Australasian Plant Conservation: J. of the Australian Network for Plant Conservation     Full-text available via subscription   (Followers: 4)
Australasian Policing     Full-text available via subscription   (Followers: 5)
Australasian Public Libraries and Information Services     Full-text available via subscription   (Followers: 32)
Australasian Review of African Studies, The     Full-text available via subscription   (Followers: 2)
Australian Aboriginal Studies     Full-text available via subscription   (Followers: 10, SJR: 0.109, h-index: 6)
Australian Advanced Aesthetics     Full-text available via subscription   (Followers: 4)
Australian Ageing Agenda     Full-text available via subscription   (Followers: 6)
Australian and Aotearoa New Zealand Psychodrama Association J.     Full-text available via subscription  
Australian and New Zealand Continence J.     Full-text available via subscription   (Followers: 3)
Australian and New Zealand Sports Law J.     Full-text available via subscription   (Followers: 8)
Australian Art Education     Full-text available via subscription   (Followers: 7)
Australian Bookseller & Publisher     Full-text available via subscription   (Followers: 1)
Australian Bulletin of Labour     Full-text available via subscription   (Followers: 2)
Australian Canegrower     Full-text available via subscription   (Followers: 2)
Australian Coeliac     Full-text available via subscription   (Followers: 1)
Australian Cottongrower, The     Full-text available via subscription   (Followers: 1)
Australian Educational and Developmental Psychologist, The     Full-text available via subscription   (Followers: 8, SJR: 0.143, h-index: 4)
Australian Family Physician     Full-text available via subscription   (Followers: 3, SJR: 0.364, h-index: 31)
Australian Field Ornithology     Full-text available via subscription   (Followers: 4, SJR: 0.141, h-index: 6)
Australian Forest Grower     Full-text available via subscription   (Followers: 4)
Australian Forestry     Full-text available via subscription   (Followers: 2, SJR: 0.252, h-index: 24)
Australian Grain     Full-text available via subscription   (Followers: 2)
Australian Holstein J.     Full-text available via subscription   (Followers: 1)
Australian Humanist, The     Full-text available via subscription   (Followers: 3)
Australian Indigenous Law Review     Full-text available via subscription   (Followers: 19)
Australian Intl. Law J.     Full-text available via subscription   (Followers: 23)
Australian J. of Acupuncture and Chinese Medicine     Full-text available via subscription   (Followers: 3, SJR: 0.106, h-index: 3)
Australian J. of Adult Learning     Full-text available via subscription   (Followers: 15, SJR: 0.159, h-index: 7)
Australian J. of Advanced Nursing     Full-text available via subscription   (Followers: 12, SJR: 0.225, h-index: 26)
Australian J. of Asian Law     Full-text available via subscription   (Followers: 4)
Australian J. of Cancer Nursing     Full-text available via subscription   (Followers: 8)
Australian J. of Civil Engineering     Full-text available via subscription   (Followers: 5, SJR: 0.17, h-index: 3)
Australian J. of Dyslexia and Learning Difficulties     Full-text available via subscription   (Followers: 8)
Australian J. of Emergency Management     Full-text available via subscription   (Followers: 10, SJR: 0.401, h-index: 18)
Australian J. of French Studies     Full-text available via subscription   (Followers: 7, SJR: 0.1, h-index: 5)
Australian J. of Herbal Medicine     Full-text available via subscription   (Followers: 3, SJR: 0.109, h-index: 7)
Australian J. of Language and Literacy, The     Full-text available via subscription   (Followers: 2, SJR: 0.399, h-index: 9)
Australian J. of Legal History     Full-text available via subscription   (Followers: 14)
Australian J. of Mechanical Engineering     Full-text available via subscription   (Followers: 3, SJR: 0.129, h-index: 4)
Australian J. of Medical Science     Full-text available via subscription   (Followers: 1, SJR: 0.122, h-index: 5)
Australian J. of Multi-Disciplinary Engineering     Full-text available via subscription   (Followers: 2)
Australian J. of Music Education     Full-text available via subscription   (Followers: 3)
Australian J. of Music Therapy     Full-text available via subscription   (Followers: 8)
Australian J. of Parapsychology     Full-text available via subscription   (Followers: 2)
Australian J. of Social Issues     Full-text available via subscription   (Followers: 5, SJR: 0.178, h-index: 20)
Australian J. of Structural Engineering     Full-text available via subscription   (Followers: 6, SJR: 0.296, h-index: 8)
Australian J. of Water Resources     Full-text available via subscription   (Followers: 6, SJR: 0.226, h-index: 9)
Australian J. on Volunteering     Full-text available via subscription   (Followers: 2)
Australian J.ism Review     Full-text available via subscription   (Followers: 8)
Australian Life Scientist     Full-text available via subscription   (Followers: 2, SJR: 0.1, h-index: 2)
Australian Literary Studies     Full-text available via subscription   (Followers: 5, SJR: 0.1, h-index: 6)
Australian Mathematics Teacher, The     Full-text available via subscription   (Followers: 6)
Australian Nursing J. : ANJ     Full-text available via subscription   (Followers: 6)
Australian Orthoptic J.     Full-text available via subscription  
Australian Primary Mathematics Classroom     Full-text available via subscription   (Followers: 4)
Australian Screen Education Online     Full-text available via subscription   (Followers: 2)
Australian Senior Mathematics J.     Full-text available via subscription   (Followers: 1)
Australian Sugarcane     Full-text available via subscription  
Australian TAFE Teacher     Full-text available via subscription   (Followers: 4)
Australian Tax Forum     Full-text available via subscription   (Followers: 3)
Australian Universities' Review, The     Full-text available via subscription   (Followers: 4)
Australian Voice     Full-text available via subscription   (Followers: 6)
Bar News: The J. of the NSW Bar Association     Full-text available via subscription   (Followers: 5)
Bioethics Research Notes     Full-text available via subscription   (Followers: 13)
BOCSAR NSW Alcohol Studies Bulletins     Full-text available via subscription   (Followers: 4)
Bookseller + Publisher Magazine     Full-text available via subscription   (Followers: 5)
Breastfeeding Review     Full-text available via subscription   (Followers: 17, SJR: 0.31, h-index: 19)
British Review of New Zealand Studies     Full-text available via subscription   (Followers: 4)
Brolga: An Australian J. about Dance     Full-text available via subscription   (Followers: 1)
Cancer Forum     Full-text available via subscription   (SJR: 0.143, h-index: 10)
Cardiovascular Medicine in General Practice     Full-text available via subscription   (Followers: 7)
Chain Reaction     Full-text available via subscription  
Childrenz Issues: J. of the Children's Issues Centre     Full-text available via subscription  
Chiropractic J. of Australia     Full-text available via subscription   (SJR: 0.107, h-index: 3)
Chisholm Health Ethics Bulletin     Full-text available via subscription   (Followers: 1)
Church Heritage     Full-text available via subscription   (Followers: 4)
Commercial Law Quarterly: The J. of the Commercial Law Association of Australia     Full-text available via subscription   (Followers: 4)
Communicable Diseases Intelligence Quarterly Report     Full-text available via subscription   (Followers: 2, SJR: 0.567, h-index: 27)
Communication, Politics & Culture     Open Access   (Followers: 13)
Communities, Children and Families Australia     Full-text available via subscription   (Followers: 2)
Connect     Full-text available via subscription   (Followers: 2)
Contemporary PNG Studies     Full-text available via subscription  
Context: J. of Music Research     Full-text available via subscription   (Followers: 8)
Corporate Governance Law Review, The     Full-text available via subscription   (Followers: 7)
Creative Approaches to Research     Full-text available via subscription   (Followers: 13)
Critical Care and Resuscitation     Full-text available via subscription   (Followers: 18, SJR: 1.737, h-index: 24)
Cultural Studies Review     Full-text available via subscription   (Followers: 15)
Culture Scope     Full-text available via subscription   (Followers: 4)
Current Issues in Criminal Justice     Full-text available via subscription   (Followers: 10)
Dance Forum     Full-text available via subscription   (Followers: 2)
DANZ Quarterly: New Zealand Dance     Full-text available via subscription   (Followers: 3)
Day Surgery Australia     Full-text available via subscription   (Followers: 2)
Deakin Law Review     Full-text available via subscription   (Followers: 14)
Developing Practice : The Child, Youth and Family Work J.     Full-text available via subscription   (Followers: 19)
Early Days: J. of the Royal Western Australian Historical Society     Full-text available via subscription  
Early Education     Full-text available via subscription   (Followers: 8)
EarthSong J.: Perspectives in Ecology, Spirituality and Education     Full-text available via subscription   (Followers: 1)
East Asian Archives of Psychiatry     Full-text available via subscription   (Followers: 2, SJR: 0.331, h-index: 7)
Educare News: The National Newspaper for All Non-government Schools     Full-text available via subscription  
Educating Young Children: Learning and Teaching in the Early Childhood Years     Full-text available via subscription   (Followers: 17)
Education in Rural Australia     Full-text available via subscription   (Followers: 1)
Education, Research and Perspectives     Full-text available via subscription   (Followers: 10)
Educational Research J.     Full-text available via subscription   (Followers: 17)
Electronic J. of Radical Organisation Theory     Full-text available via subscription   (Followers: 3)
Employment Relations Record     Full-text available via subscription   (Followers: 2)
English in Aotearoa     Full-text available via subscription   (Followers: 1)
English in Australia     Full-text available via subscription   (Followers: 2, SJR: 0.19, h-index: 6)
Essays in French Literature and Culture     Full-text available via subscription   (Followers: 7)
Ethos: Official Publication of the Law Society of the Australian Capital Territory     Full-text available via subscription   (Followers: 5)
Eureka Street     Full-text available via subscription   (Followers: 5)
Extempore     Full-text available via subscription  
Family Matters     Full-text available via subscription   (Followers: 10, SJR: 0.259, h-index: 8)
Federal Law Review     Full-text available via subscription   (Followers: 21)
Fijian Studies: A J. of Contemporary Fiji     Full-text available via subscription   (Followers: 1)
Focus on Health Professional Education : A Multi-disciplinary J.     Full-text available via subscription   (Followers: 7)
Food New Zealand     Full-text available via subscription   (Followers: 4)
Fourth World J.     Full-text available via subscription   (Followers: 1)
Frontline     Full-text available via subscription   (Followers: 18)
Future Times     Full-text available via subscription   (Followers: 2)
Gambling Research: J. of the National Association for Gambling Studies (Australia)     Full-text available via subscription   (Followers: 5)
Gay and Lesbian Law J.     Full-text available via subscription   (Followers: 2)
Gender Impact Assessment     Full-text available via subscription   (Followers: 1)
Geographical Education     Full-text available via subscription   (Followers: 2)
Geriatric Medicine in General Practice     Full-text available via subscription   (Followers: 8)
Gestalt J. of Australia and New Zealand     Full-text available via subscription   (Followers: 2)
Globe, The     Full-text available via subscription   (Followers: 3)
Government News     Full-text available via subscription   (Followers: 2)
Great Circle: J. of the Australian Association for Maritime History, The     Full-text available via subscription   (Followers: 7)
Grief Matters : The Australian J. of Grief and Bereavement     Full-text available via subscription   (Followers: 10)
He Puna Korero: J. of Maori and Pacific Development     Full-text available via subscription   (Followers: 4)
Headmark     Full-text available via subscription   (Followers: 2)
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Health Issues     Full-text available via subscription   (Followers: 2)
Health Promotion J. of Australia : Official J. of Australian Association of Health Promotion Professionals     Full-text available via subscription   (Followers: 8, SJR: 0.606, h-index: 19)
Health Voices     Full-text available via subscription  
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Journal Cover Australian Journal of Mechanical Engineering
  [SJR: 0.129]   [H-I: 4]   [3 followers]  Follow
    
   Full-text available via subscription Subscription journal
   ISSN (Print) 1448-4846
   Published by RMIT Publishing Homepage  [400 journals]
  • Volume 13 Issue 1 - Flank wear and surface roughness prediction in hard
           turning via artificial neural network and multiple regressions
    • Abstract: Senthilkumar, N; Tamizharasan, T
      This paper deals with the prediction of flank wear of the cutting tool insert and surface roughness of the machined surface in hard turning using artificial intelligence technique. During machining of hard materials, the flank wear and surface roughness are favoured by both machining parameters and geometrical parameters. Prediction of output responses is much more important since surface roughness produced depends on the wear occurring at the flank face of the cutting tool insert. Based on the chosen input control parameters an L18 orthogonal array is chosen for seven input parameters varied through three levels to perform experiments using Taguchi's design of experiments. An artificial neural network (ANN) model is developed to predict the flank wear and surface roughness, which is compared with the predicted values from the developed empirical equations using multiple linear regression models. The results obtained from the ANN model shows a good prediction when comparing with the regression models showing the superiority of the generated neural network model.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 13 Issue 1 - Instructions to authors submitting to Engineers
           Australia Technical Journals
    • PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 13 Issue 1 - Abstracts
    • PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 13 Issue 1 - Modern oil-flooded screw compressors for new
           unconventional gas developments
    • Abstract: Almasi, A
      Technical and commercial advantages of API-619 oil-flooded screw compressors (using fixed-speed electric motors) have made them the compressor of choice for unconventional gas gathering applications. The lubricant oil provides screw rotor separating, internal cooling, noise damping, corrosion protection and a considerably higher compression ratio capability. The minimum number of compressor trains in a single station is recommended. It is recommended to design nodal compressors with a low suction pressure capability in a way that compressors can facilitate gas collection even for a low well pressure. The compressor speed is an important parameter in compressor sizing, selection and optimisation. Critical areas for performance and reliability including component design/manufacturing, seals, pulsation, noise, and auxiliary systems are outlined. Best methods of capacity control and condition monitoring are also described. Case studies are presented.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 13 Issue 1 - Advanced gas turbine packaging
    • Abstract: Almasi, A
      Latest achievements, new procedures and modern methods on the gas turbine packaging and the integration of a gas turbine in a plant are discussed. The goal is an optimum gas turbine package arrangement considering performance, reliability and commercial conditions. The focus is to explain latest technologies and recent methods to obtain the lowest "total cost of ownership" for a gas turbine package. Critical areas related to the gas turbine packaging such as the inlet air filter system, the fuel system, the heat recovery system, the control system, monitoring methods, the lubrication oil system and others are explained. A case study is also presented.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 13 Issue 1 - Neural network-based compensation control for
           trajectory tracking of industrial robots
    • Abstract: Zhang, Q; Xiao, J; Wang, G
      In this paper, a novel dynamic compensatory strategy based on radial basis function (RBF) neural network robust H infinity controller is put forward for improving trajectory tracking accuracy of robot manipulators on account of modelling errors and external disturbances. The proposed strategy is effective to compensate the computed torque controller relied on precise dynamic model of robot, consisting of a RBF neural network, a variable structure controller and a robust H infinity controller. Furthermore, a velocity feed-forward with proposed method is employed to achieve higher trajectory tracking accuracy of end-effector and avoid the consideration of torque interface. The parameters of uncertain dynamics model are estimated by RBF neural network, while a variable structure controller is employed to make up the approximation errors of neural network. With the help of robust H infinity controller, effect of external disturbances will be attenuated and the robust tracking performance is achieved. Based on Lyapunov stability theorem, it is shown that the proposed controller can guarantee the stability of the control system and the desired performance of robotic system. The simulations and experiments on a multi-robot cutting manipulator indicate that the proposed compensatory strategy for industrial robot manipulator is superior to traditional computed torque control method in consideration of uncertainties.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 13 Issue 1 - Three-dimensional optical measuring method for the
           tooth surface of high-order oval bevel gears
    • Abstract: Lin, C; Zeng, Q; Zhang, L; Li, S; Gong, H
      In view of the complexity of geometry design theory for high-order oval bevel gears' tooth profile and the difficulties in detecting the tooth surface error, the researches into tooth surface error detection and analysis methods of high-order oval bevel gears were launched. In the view of the feature of three-dimensional (3D) optical measuring method, a 3D optical scanner was used. Meanwhile, the tooth profile parametric equations of a bevel gear cutter with standard spherical involute and non-circular bevel gear were deduced based on the spatial meshing theory and the theory of spherical triangle. Then the 3D optical scanning detection experiment of oval bevel gears was designed and accomplished. After that, the reverse engineering was performed according to the point cloud which was obtained before, and a tooth surface which within a certain tolerance range can be obtained from the reverse engineering. The normal deviation nephogram of theoretical tooth surface and processed tooth surface can be obtained by comparing the tooth surface which is gotten from reverse engineering with theoretical tooth surface. Finally, the measurement and visualisation for processing tooth surface of high-order oval bevel gears were achieved. Meanwhile, the machining accuracy class of five-axis precision milling method was obtained.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 13 Issue 1 - Contact model and tooth contact analysis of double
           helical gears with parallel-axis, crossed-axis and modification
    • Abstract: Wang, C; Cui, HY; Zhang, QP; Wang, WM
      Considering the modification of teeth, misalignment error and machining error, the paper proposes an approach for computerised simulation of double helical gears meshing. Algorithms for the tooth contact analysis (TCA) computer programs are presented. By using this program, the path of surface contact and transmission errors are obtained. Finally, an experiment that illustrates the proposed theory is provided. The results indicate that the TCA method of double helical gears is reliable.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 13 Issue 2 - Hardpoint correlation analysis and optimal design for
           front suspension of a formula SAE car
    • Abstract: Liu, X; Wang, M; Wang, X; Li, C; Guo, H; Luo, J
      The performance and kinetic characteristic of a suspension are closely related to the handling stability, comfort ability, and handling of the steering of a Formula SAE car. We build and analyse a simulation model of a double wishbone front suspension based on multi-body dynamics and suspension kinematic theory. From the correlation theory, the correlation of the hardpoints of the suspension is studied and discussed. From all the tests conducted, variations in the wheel alignment parameter are obtained. The optimal suspension is designed and analysed using the correlation of the hardpoints. The rational design of the hardpoints can provide a useful reference for vehicle design.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 13 Issue 2 - Adaptive neuro fuzzy inference system modelling of
           multi-objective optimisation of electrical discharge machining process
           using single-wall carbon nanotubes
    • Abstract: Prabhu, S; Vinayagam, BK
      Electrical discharge machining (EDM) has new avenues for finishing of hard and brittle materials with nano surface finish, high tolerance and accuracy. The single-wall carbon nanotube (SWCNT) is mixed with kerosene dielectric fluid in die sinking EDM process. The analysis of surface characteristics like surface roughness and metal removal rate of AISI D2 tool steel materials were carried out and an excellent machined nano finish can be obtained by setting the machining parameters at optimum level. This study deals with modelling of surface roughness with SWCNT-based EDM using adaptive neuro fuzzy inference system approach. The first-order Sugeno-type fuzzy interference modelling has been used to predict the output parameters and compared with experimental values. The R2 value of regression model for with CNT is 0.706 and for without CNT is 0.652. The high R2 indicate that better model fit the data very well using CNT-based machining. The proposed model can also be used for estimating surface roughness and metal removal rate online.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 13 Issue 2 - Fracture mechanics of planetary gear set by using
           
    • Abstract: Molatefi, H; Najafian, S; Mozafari, H
      Contour integral method is the conventional approach in order to characterise main crack parameters in fracture studies. This method is used in verity fields in fractures mechanics because of its capability in linear and non-linear fracture mechanics. Whereas, requirements such as mesh singularity in crack tip and refined layers of elements in surrounding contours, which increase computing time and make it prolix for large components. The main aim of this paper is to develop an extended finite element method-linear elastic fracture mechanics (XFEM-LEFM) model to impart XFEM advantages in survey of fracture mechanics of planetary gear sets. At first main crack parameters of root crack of the planet gear have been obtained and compared with conventional method, and after that crack growth path is predicted, and finally effect of rim thickness is investigated and compared with other researches to illustrate the efficiency of the developed model. For this purpose, Python script code is generated to automatically calculate the stress intensity factors of root crack and after that simulate the crack growth path until final fracture.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 13 Issue 2 - Modelling and bending strength analysis of cylindrical
           gears with arcuate tooth trace
    • Abstract: Jia, F; Hou, L; Wei, Y; Li, B; You, Y
      Based on the analysis of precision moulding mechanism for cylindrical gears with arcuate tooth trace (arc gear), the equation for tooth flank of arc gear was derived preliminarily and the ideal concave and convex tooth flanks were got by MATLAB simulation to achieve graphics rendering. On this basis, with UG NX8.0, the accurate three-dimensional modelling of arc gear was established to be used for the finite element analysis. Then, for the problem that there is no standardised bending strength calculation formula of arc gear, with the aid of finite element method (FEM) this paper studied the relationship between tooth line radius and bending strength. With FEM analysis performed, it was confirmed that under the same conditions, the bending strength of arc gear could be significantly improved compared with that of spur gear and helical gear, and that variation curve of tooth root stress was obtained under the different tooth line radius. Therefore, the analysis method provides engineering applications value under the high-speed and heavy-load working conditions and theoretical basis for the strength theory and design of arc gear.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 13 Issue 2 - Instructions to authors submitting to 'Engineers
           Australia technical journals'
    • PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 13 Issue 2 - Investigation on mechanical properties of aluminium
           7075-silicon carbide-alumina hybrid composite using Taguchi method
    • Abstract: Rajeswari, B; Amirthagadeswaran, KS; Anbarasu, KG
      Metal matrix composites (MMCs) are now gaining their usage in aerospace, automotive and biomedical industries because of their inherent properties like high strength to weight ratio, low wear rate, etc. An investigation was made on MMC-based aluminium 7075 alloy using design of experiment by Taguchi technique. The primary objective is to predict the better parameters that give the highest tensile strength and hardness using Taguchi method to the castings. The control of processing parameters is very important in order to obtain good quality casting with minimal defect. The test samples were prepared by varying the weight percentage of reinforcement, stirring speed and processing temperature in stir casting. An orthogonal array and analysis of variance were employed to investigate the influence of process parameters on the required properties. Optimum parameters were noted for attaining the maximum mechanical properties of composites by the application of Taguchi method. The main motivation of this research work is to identify how the parameters of influence when varied produce defect free composite casting with required tensile strength and hardness which may be utilised for specific applications based on the values obtained in the experiments. Confirmation test with the optimal levels of processing parameters was carried out in order to illustrate the effectiveness of the Taguchi optimisation method.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 13 Issue 2 - The influences of die structure parameters on
           extrusion force of manufacturing AZ31 magnesium alloy
    • Abstract: Hu, H-J; Ou, ZW
      Magnesium alloys as the lightest structural metal material are very attractive in various applications in automotive and aerospace industries. Direct extrusion is a common method to improve workability and strength of magnesium alloys and refine the grains structure. Researches have been done to simulate the direct extrusion process to manufacture AZ31 magnesium rods. The characterisations of the magnesium AZ31 alloy during extrusion have been concerned. The evolutions of extrusion forces affected by extrusion dies with different die structure parameters such as extrusion ratio, friction coefficients, radius of entrance, etc. have been predicted. Analysis of the die design parameters which affect the difference of the extrusion force shows that die structural parameters influence the extrusion forces remarkably. A group of optimisation parameters for die structures have been obtained from simulation results and used to extrusion experiments. AZ31 magnesium alloy billet can be extruded easily by using the optimisation process parameters in the extrusion experiments. Finite element methods have been used for the optimal design of the die to decrease the extrusion force caused by extruding magnesium alloy. The obtained results have illustrated that the extrusion force of direct extrusion for magnesium in the optimum curved die is reduced considerably.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 12 Issue 2 - Is there really no need to be able to predict matrix
           failures in fibre-polymer composite structures': Part 1: Explanation
           of fatal flaws in existing theories
    • Abstract: Hart-Smith, LJ
      A logic-based case is presented that it is necessary to be able to predict matrix failures in fibre-polymer composites, even though some 50 years after the introduction of the advanced fibre-polymer composites there is still no widely accepted theory capable of actually doing so. This lack is due to the widespread malpractice of artificially homogenising distinct fibre and matrix constituents into an "equivalent" anisotropic solid, to simplify the mathematics. The enormous residual thermal stresses in the matrix, even when the lamina is stress-free, are not widely recognised; these detract appreciably from the ability of the matrix to withstand applied mechanical loads. The extreme thermal mismatch between the fibres and the polymer causes the resin to try to shrink during cool-down after cure at high temperature, but the strong stiff fibres prevent this from happening. Such internal residual stresses cannot possibly exist in truly homogeneous materials, so the consequences are overlooked whenever homogenised material models are used in analyses when they should not have been. The case is made that it is impossible to predict matrix failures using any theory in which the fibre and resin constituents have been artificially homogenised, despite the myriad of theories claiming to do so that cannot.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 12 Issue 2 - Performance analysis of parallel hub diverging casing
           axial annular diffuser with 20 degrees equivalent cone angle
    • Abstract: Arora, BB
      The performance of axial annular diffuser with parallel hub and diverging casing for same equivalent cone angle of 20 degrees has been analysed with the help of computational fluid dynamics for area ratio 2, 3 and 4. The analysis has been carried out for flow regime with various experimentally obtained inlet velocity profiles for area ratio 2 with or without swirl. The flow behaviour inside the annular diffuser was analysed and pressure recovery coefficient was computed which agrees reasonably well with the experimental/available data. Further prediction of flow behaviour inside the annular diffuser and the expected pressure recovery coefficient has been computed.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 12 Issue 2 - Is there really no need to be able to predict matrix
           failures in fibre-polymer composite structures': Part 2: Examples of
           matrix failures preceding fibre failures
    • Abstract: Hart-Smith, LJ
      This paper describes typical situations in composite structures where non-catastrophic matrix failures precede fibre failures, but which all of the most popular composite failure theories, based on artificially homogenised laminae, are inherently incapable of predicting. This emphasises the very real need for improved theories advocated in the companion paper on the theory and related physics. Examples are selected from both secondary and primary structures One chronic problem, arising in many guises, is the excessive clustering of too many parallel fibres for the polymer resin in which they are embedded to transfer loads in and out of them. Another common problem is abrupt interruptions of load paths, with only the matrix to diffuse the end loads. The interruptions can be the result of both poor design practice and impact damage. Some matrix cracks shown cannot be associated with pre-existing starter cracks, thereby devaluing theories requiring their pre-existence in order to apply the theories. Worse, the absence of theories with which to characterise the adverse consequences of an inadequate resin content have led to conscious efforts to minimise resin content, to maximise fibre-dominated longitudinal lamina strengths, with no awareness of the consequential reduction in load carrying capability when the matrix is dominant.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 12 Issue 2 - Study the effect of shielded metal arc welding process
           parameters, cryo-treatment and preheating on welding characteristics and
           modelling by an artificial neural network
    • Abstract: Ali, MS; Rao, CS; Rao, DN
      Depth of heat affected zone (HAZ), depth of penetration and bead geometry (bead height and bead width) are most important characteristics of a weldment. In addition to weld process parameters welding conditions like preheating and cryo-treatment greatly affect the weldment characteristics. It is possible to get good bead geometry with cryo-treatment and preheating for some range of current, voltage and arc travel rate for which bead formation may not be possible in normal welding condition. In SMAW (shielded metal arc welding) process, selecting appropriate values for process variables is essential in order to control weldment characteristics. Also, conditions must be selected that will ensure a predictable and reproducible weld bead. In this investigation the effects of cryo-treatment and preheating on various metallurgical aspect, namely, the depth of HAZ, weld interface, grain growth and grain refinement regions have been studied. While cryo-treatment before welding decreased the grain size in HAZ and preheating increased the grain size and cryo-treatment after welding did not significantly increase the grain size. The process was modelled using an artificial neural network. Supervised mode of learning was used while training the neural networks. The test cases showed good convergence with the measured experimental values.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 12 Issue 2 - Increasing bending strength in spur gears using shape
           optimisation of cutting tool profile
    • Abstract: Zhao, X
      The geometrical shape of gear tooth fillet profile, usually cut out by the cutter tip, plays a significant role in the evaluation of the gear bending stress. In order to improve the teeth bending strength, a novel curve (quadratic rational Bezier curve) is introduced to describe the cutter tip. The gear tooth finite element models are founded by APDL in the ANSYS software. With the maximum bending stress (von Mises stress) as the objective function, SUB-PROBLEM and FIRST-ORDER optimisation methods in ANSYS are used to optimise the cutter tip. Single-tooth bending test is also conducted to prove the optimisation result. The study reveals that the relationship between the design variable and tooth root bending stress is non-linear, and the gear cut by the optimised cutter exhibits higher bending strength rather than the gear cut by standard cutting tool.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 12 Issue 2 - An approach for reducing cost of carbon
           fibre-reinforced polymer structures using primary materials
    • Abstract: Kumar, VM; Safiulla, M; Ahmed, KAN
      The growing use of advanced composites in the aerospace industry has led to the development of new methods and equipment for manufacturing these new materials and structures. In this relatively new field of design, behaviour of production costs relative to different design variables is a challenging task. Carbon "pre-impregnated" (prepregs) composite fibres are costlier and are widely used as main load bearing members in the aircraft structures. As a result of this, 40% of a structural part cost is about its prepreg material. As prepreg material is expensive it is necessary to optimise its usage by avoiding wastages and implementing nesting program in automated prepreg cutting machines. The primary goal of this study is to f nd out an alternate solution to optimise material usage and to use primary dry f bres in between prepreg layers during lay-up and to evaluate the mechanical and ultrasonic properties. Different lay-up schemes are used to mix dry fibres in between prepreg layers to prepare test specimens as per DIN 29971 standards. This research reveals a method whereby companies can reduce their product cost by 18-20% . This concept has considerable scope for application in industry as the companies can make parts at minimum cost.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 12 Issue 2 - Optimisation of machining and geometrical parameters
           in turning process using Taguchi method
    • Abstract: Senthilkumar, N; Ganapathy, T; Tamizharasan, T
      One of the most important factors that adversely affect quality of turning process is flank-wear. The flank-wear influences surface roughness and dimensional accuracy of finished product. Both flank-wear and surface roughness depend upon machining parameters and geometry of cutting tool inserts. Therefore, in order to ensure minimum flank-wear and surface roughness, it is necessary to optimise these machining and geometrical parameters in turning process. In the present work, seven parameters - cutting speed [m/minute], feed rate [mm/ rev], depth of cut [mm], material type (hardness value HB), cutting-insert-shape, relief angle [degrees] and nose radius [mm] - were selected. Experimental layout using Taguchi's L18 orthogonal array was employed. Flank-wear and surface roughness were minimised using Taguchi's signal-to-noise ratio concept with lower-the-better quality characteristic. Experimental results demonstrate the effectiveness of the Taguchi's optimisation approach. Optimal setting of machining and geometrical parameters yielded significant reduction in flank-wear and surface roughness value of 53.86% and 15.95%, respectively. A validation experiment was also carried out for confirmation. The optimum flank-wear and surface roughness were 0.057 mm and 1.0248 mum, respectively. The significance test using analysis of variance showed that the cutting-insert-shape, feed rate, cutting speed and material hardness were the most critical parameters with percentage of contribution 36.94%, 30.82%, 10.47% and 8.87%, respectively.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 12 Issue 2 - Effect of machining parameters on surface roughness in
           end milling of AISI 304 steel using uncoated solid carbide tools
    • Abstract: Kalidass, S; Palanisamy, P
      This work aims at studying the effect of helix angle and cutting conditions of the machining performance, particularly on the surface roughness (Ra) during the end milling of AISI 304 steel with uncoated solid carbide tools. Experiments were conducted based on four-factors and five level central composite rotatable design matrix. A mathematical model has been exclusively developed to predict the surface roughness in terms of cutting parameters such as helix angle of the cutting tool, spindle speed, feed rate and depth of cut using response surface methodology. The optimum Ra value 1.21 mm was obtained for AISI 304 steels. The direct and interaction effect of the machining parameters with Ra were analysed using contour graphs.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 12 Issue 2 - Pre-commissioning, commissioning and start-up of
           industrial plants and machineries
    • Abstract: Almasi, A
      The commissioning is the use of a disciplined, systematic and professional methodology, to convert the constructed industrial facility into an integrated and operational industrial unit. This process should be implemented in a safe and efficient manner within defined time-frame and budget. New guidelines, latest lessons learned and modern practical notes for the commissioning of industrial plants are addressed. The main focus of this article is on the mechanical equipment and machineries. A case study is also presented.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 12 Issue 2 - Unbalance, misalignment, fl uid-induced, frictional,
           anisotropic and torsional-lateral vibrations in turbomachines
    • Abstract: Almasi, A
      Practical notes on unbalance, misalignment, excessive radial loads, fluid-induced vibrations, frictional excitations, and torsional-lateral coupled vibrations in turbomachines are discussed. Advanced vibrational condition monitoring methods are presented which can be used for identification of these malfunctions. The effects of the anisotropic supports, asymmetric rotor assemblies, bearings and couplings on rotordynamics of turbomachines are described. Case studies are also presented. The damped unbalance dynamic response test (known as the "synchronous test") consists of inputting a controlled unbalance to the rotor and measuring its synchronous response. An active magnetic bearing can be employed as an exciter for turbomachine rotordynamics verifications (including a "non-synchronous testing"). Higher harmonics (particularly 2 ) and an abnormal orbital motion are indicative of an excessive misalignment or a radial load. The fluid whirl vibrations because of bearing fluid interactions have frequencies slightly lower than 0.5 . The anisotropy can result in closely spaced, coupled "pairs" of natural frequencies (the "split resonances"). When using a high angular stiffness coupling, the driver and driven equipment will not behave as two independent turbomachines.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 12 Issue 2 - Instructions to authors submitting to Engineers
           Australia technical journals
    • PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 12 Issue 2 - Abstracts
    • PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 12 Issue 2 - Latest practical notes and recent lessons learned on
           rotordynamics of power generation machineries
    • Abstract: Almasi, A
      The purpose of this article is to provide new practical guidelines on rotordynamics and stability analysis of power generation trains. Latest methods, modern recommendations, recent lessons learned and new practical notes on power generation machinery rotordynamics are presented. Critical areas relative to the safety and reliability of the power generation machine design and component selection including the bearing dynamic effects, the rotordynamics study and modelling methods, the third party analysis, the gear unit dynamic and potential instability sources are discussed. The main concern is the correct design and dynamic study of a power generation train before the equipment fabrication and the component sub-supply started and for some issues even before the power generation train order. Case studies are also presented.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 12 Issue 1 - Preface
    • Abstract: Gu, YuanTong
      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 12 Issue 1 - Kinematic and static analysis of a planar compliant
           tensegrity-like parallel mechanism
    • Abstract: Ji, Z; Li, T; Lin, M
      In this work, a novel planar compliant tensegrity-like parallel mechanism composed of a set of rods and strings is introduced. The mechanism has low mass and high strength to weight ratio compared with conventional parallel mechanisms. An energy based method is employed to find the analytical solutions to the forward and inverse position analysis. Afterwards, the singular configurations are detailed. The actuator and output workspaces are then mapped. Moreover, an analytical approach based on an energy formulation is used to evaluate the stiffness of the mechanism. Finally the characteristics of the mechanism are reported.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 12 Issue 1 - A comparative analysis of tool wear prediction using
           response surface methodology and artificial neural networks
    • Abstract: Premnath, AA; Alwarsamy, T; Sugapriya, K
      The research reported herein is to study the comparison between a response surface methodology (RSM) and artificial neural network (ANN) in the modelling and prediction of tool wear during face milling of hybrid composites. Aiming to achieve this goal, several milling experiments were performed with polycrystalline diamond (PCD) inserts at different machining parameters namely feed rate, cutting speed, depth of cut and weight fraction of alumina (Al2O3). The experiment was carried out using 6061 aluminium alloy reinforced with alumina of size 65 mum and graphite of size 60 mum particles which are prepared using stir casting method. Mathematical model is created using central composite face centred second-order RSM and the adequacy of the model was verified using analysis of variance. With regard to the machining test, it was observed that feed rate is the dominant parameter that affects tool wear of PCD inserts. The comparison results show that models provide accurate prediction of tool wear in which ANN perform better than RSM. The data predicted from ANN is very nearer to experimental results compared to RSM, therefore we can use this ANN model to determine the tool wear for various composites and also for various machining parameters.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 12 Issue 1 - Prediction of spring-back and bend force in air
           bending of electro-galvanised steel sheets using artifi cial neural
           networks
    • Abstract: Srinivasan, R; Vasudevan, D; Padmanabhan, P
      Air bending is a frequently used process for sheet metal fabrication. Spring-back and bend force are the two essential parameters to be predicted for the design of tooling and selection of press. In air bending of electro-galvanised steel sheets, these two parameters are affected by the factors such as strain hardening exponent, coating thickness, die opening, die radius, punch radius, punch travel and punch velocity. This paper presents the development of a predictive model of spring-back and bend force using artificial neural network (ANN) approach. A central composite design of 88 experiments is conducted to obtain the data required for training the network. A new set of data combinations, not belonging to the training data, is used to assess the generalisation performance of the neural network. The network is validated with a set of validation data and it is found that ANN is capable of predicting the two parameters.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 12 Issue 1 - Multi-objective optimisation design of passive
           suspension parameters based on competition-cooperation game model
    • Abstract: Song, C; Zhao, Y; Wang, L; Niu, L
      The primary function of a vehicle suspension system is to isolate the road excitations experienced by tires. In this paper, the competition-cooperation game method is applied to optimise a linear vehicle suspension model with eight degrees of freedom. Considering road surface damage and ride comfort, using the stiffness and damping of seat and suspension systems as design variables, and using the seat acceleration root-mean-square, tire's relative dynamic load and suspension's maxim dynamic stroke as objective functions, a competitive and cooperative game design model is established, and the optimal methods are presented. By calculating the influence of the design variables on the objective functions and fuzzy clustering, the design variables are divided into different strategic spaces owned by each player. Based on the competitive and cooperative game model, each game player uses its payoff as a mono-objective to optimise its own strategic spaces and obtains the best strategy to address the others. All the best strategies are combined into a game strategy set. Compared with fuzzy optimisation and initial design, the results show that ride comfort, road surface damage, and suspension dynamic travel are improved.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 12 Issue 1 - Wind turbine planetary gearbox health diagnostic using
           time-varying meshing stiffness
    • Abstract: Abouel-Seoud, SA; Dyab, ES
      In wind turbine planetary gearbox, the ability to identify ring-planet-sun gears meshing stiffness from the real data of vibration responses makes it possible to determine the physical existed planet gear defects which are used for severity assessments. There are limitations for vibration based gear diagnostic methods. Vibrations are secondary effects in the sense that they are dynamic responses of a gearbox excited by meshing stiffness and other excitations. The aim of this work is to diagnose the level of defects (gear tooth crack, gear tooth spalling and gear tooth breakage) in wind turbine gearbox using gears meshing stiffness. Time-varying meshing stiffness is used, where, a technique consists of a non-linear numerical optimisation is applied. The optimisation uses a dynamic model of the gears mesh and forms an estimate of both time-varying and frequency-varying mesh stiffness that best corresponds to the given set of vibration data. Multi-hour tests were conducted and recordings were acquired using translation vibration monitoring, where the optimum meshing stiffness was computed. The optimum meshing stiffness with the recording time was highlighted suggesting critical changes in the operation of the gearbox. The results indicate that if one tooth is defected due to cracks, spalling and breakage to reach the setting maximum level, the maintenance regime will be called despite a new damage is prone in the adjacent tooth to save time and cost.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 12 Issue 1 - The influence of bacteria-based biofouling on the wall
           friction and velocity distribution of hydropower pipes
    • Abstract: Perkins, SCT; Henderson, AD; Walker, JM; Sargison, JE; Li, XL
      Algae biofouling due to freshwater diatoms has been investigated thoroughly in open channel flows. Their presence has been shown to cause a significant increase in the local skin friction coefficient, the overall drag coefficient and can produce reductions in flow capacity of up to 10%. This study extends previous work to investigate bacteria-based biofouling that forms on the inside walls of pipelines and machinery that are not exposed to direct sunlight. The effect of biofouling on a 1.5 m long internally painted pipe section of diameter 101.6 mm was investigated. The pipe section was installed in a hydropower scheme for an extended period to allow the growth of flow conditioned biofilms at an average flow velocity of U = 1.3 ms-1. The pipe section was tested over a range of Reynolds numbers under fully-developed turbulent conditions. At each flow rate the head loss of the fouled pipe was measured as well as the complete velocity profile at the downstream end of the pipe to ensure the full effect of the biofouling was captured. These results were used to evaluate the pipe friction factor and sand equivalent surface roughness. Trends in the experimentally determined values of pipe friction factor with varying Reynolds number are significantly different from those predicted by empirically-based theory. Experimental velocity profiles show significant deviations from the theoretical prediction of flow through a rough pipe, with a higher maximum velocity observed in the centre of the pipe but a lower velocity in the near wall region.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 12 Issue 1 - Static stability analysis of non-slewing articulated
           mobile cranes
    • Abstract: Wu, J; Guzzomi, AL; Hodkiewicz, M
      The occurrence of several non-slewing articulated mobile (NSAM) crane tipping accidents in Australia has raised concerns about their stability. This paper examines the inherent stability of the NSAM crane design. It does this using geometrical modelling and theoretical static force analysis. An investigation into the tip-over and roll-over stabilities of the model under a number of static conditions is presented. The results suggest that having the articulation joints at the centre of wheelbase is a suitable design for the NSAM cranes for the manoeuvrability and tip-over stability but not for the roll-over stability.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 12 Issue 1 - Precision forging of spur gear by flow control forming
           method
    • Abstract: Yang, C; Zhao, S; Zhang, J
      In order to reduce the final forging load of spur gear precision forging, several alternative die designs that use a ring billet are put forward. The influence of different designs on metal flow and load requirements is examined through finite element simulation and experiments. A new precision forging technology is then developed, which includes a two-step forging process to control metal flow in the die cavity. Well-shaped products can be forged successfully by using a lower forging load than that of conventional forging.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 12 Issue 1 - Finite element analysis and evaluation of bearing
           capacity for subsea tree connector
    • Abstract: Chuan, W; Zhu, H; Kong, X
      As a critical structural member used for deepwater oil and gas exploration and development, subsea tree connectors experience a very harsh environment and multi-operational modes, which affect its reliability and safety. A three-dimensional finite element model was developed to analyse and evaluate the bearing capacity of a subsea tree connector with a bolt connection. The analysis of structural behaviour under three typical operational modes was performed. The connector components that govern the structural behaviour in different loading conditions were confirmed. Full-scale tensile testing verified the finite element analysis method for evaluating the capacity of connector. A combination of finite element analysis and design factors was used to establish the structural safety margin with one safety factor for each limit state, including the normal operation limit and the extreme operation limit.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 12 Issue 1 - New analytical method for dynamic non-linear
           elastic-plastic deformation of rotating machine rotor
    • Abstract: Almasi, A
      A new analytical method is presented to evaluate the dynamic deformation and the elastic-plastic stress and strain in rotating machine shafts as result of transient axial forces. This new method has capability to account for the geometric non-linearity, the initial shaft imperfection, the elastic-plastic deformation and the dynamic/transient effects. Proposed method could be used for the evaluation of the shaft performance for various rotating machines under different operation situations. Allowable deflection/axial load values could be calculated with presented method for any rotating machine shaft. A case study is also discussed. New practical notes on the shaft failures with special focus on the axial loading and the fatigue effects are also presented.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 12 Issue 1 - New all aero-derivative gas turbine driven LNG modules
    • Abstract: Almasi, A
      Liquefi ed natural gas (LNG) plays a key role due to the growing demand for this energy source compared to other more polluting fossil fuels. Advantages of new aero-derivative gas turbines compared to old-fashion inefficient heavy frame gas turbines for large LNG units are described. The focus of article is on the gas turbine drivers for refrigeration compressors. New practical notes, modern developments and latest achievements on using large aero-derivative gas turbines in LNG units are discussed and a case study is also presented.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 12 Issue 1 - Instructions to authors submitting to Engineers
           Australia technical journals
    • PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 12 Issue 1 - Abstracts
    • PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 12 Issue 1 - A general articulation angle stability model for
           non-slewing articulated mobile cranes on slopes
    • Abstract: Wu, J; Guzzomi, AL; Hodkiewicz, M
      In recent years there have been reports of a number of non-slewing articulated mobile (NSAM) crane tipping accidents in Australia. Recent work by the authors explored the stability of NSAM cranes at two specific articulation configurations. This short note develops a general static model for the stability of NSAM cranes on slopes with various orientations.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 12 Issue 1 - Latest methods and new lessons learned for rotating
           machine piping
    • Abstract: Almasi, A
      Optimum piping design, new support arrangement and latest layout configuration for rotating machines are addressed. New practical notes and latest achievements on rotating machine piping, nozzle load optimisation, stress analysis and flexibility review are discussed. The piping designers always want higher allowable nozzle loads to simplify piping designs, while the rotating machine manufacturers want smaller allowable nozzle loads to ensure good alignment, higher reliability and fewer operation complaints. From an operator's point of view, where long-term reliability is a very important factor, the vote should go to the rotating machine manufacturer.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 12 Issue 3 - Analysis and finite element simulation of bimetallic
           backward rod extrusion
    • Abstract: Haghighat, H; Momeni-Khabisi, H
      In this paper, the process of bimetallic backward rod extrusion through a conical punch, by means of upper bound method and finite element method is investigated. An admissible velocity field is developed and then by calculating the internal, shear and frictional powers, the extrusion force is estimated. The extrusion process is also simulated by using the finite element code, ABAQUS. Analysis and simulations are done for two types of bimetallic rods: aluminium as core, copper as sleeve (Al-Cu) and copper as core, aluminium as sleeve (Cu-Al). The extrusion force from the upper bound method is compared with the finite element results. This comparison shows that the upper bound predictions are in good agreement with the finite element results. The results also show that, the extrusion force in the case of Cu-Al rod is smaller than Al-Cu rod and in both types of bimetallic rods, the aluminium leaves the deformation zone sooner than the copper. Finally the effects of various extrusion parameters, such as the friction factor, reduction in area and semi-punch angle upon the extrusion force are investigated and the optimum semi-punch angle is determined.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 12 Issue 3 - Predicting stiff ordinary differential equations with
           stiffness coefficient
    • Abstract: Aliyu, BK; Nwojiji, CU; Kwentoh, AO
      Stiff ordinary differential equations (ODEs) are present in engineering, mathematics, and sciences. Identifying them for effective simulation is imperative. This paper considers only linear initial value problems and brings to light the fact that stiffness ratio or coefficient of a suspected stiff dynamic system can be elusive as regards the phenomenon stiffness. Though, it gives the insight suggesting stiffness when the value is up to 1000 but is not necessarily so in all ODEs. Neither does a value less than 1000 imply non-stiffness. Here we put forward that a stiff ODE among other considerations should also require only a stiff solver to easily approximate its solution, otherwise it is non-stiff and experimenting with different solvers is invaluable. Since no single numerical method of solving a model suffices for all systems, choice of a suitable solver for simulation is of utmost important. Hence, experimenting with all the variable-step solvers in Matlab ODE suit for every problem is invaluable. Results point to the fact that stiffness coefficient of about 1000 does not always suggest that an ODE is stiff nor does a value less than 1000 suggest non-stiff. Also, Matlab and Maple results were compared graphically with no disparity.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 12 Issue 3 - Experimental study of friction coefficient and wear
           rate of turned and ground mild steel surfaces sliding against smooth and
           rough SS304 counterfaces
    • Abstract: Chowdhury, MA; Nuruzzaman, DM; Chowdhury, MAK; Roy, BK
      A series of experimental tests were carried out using turned and ground mild steel surfaces rubbing against smooth and rough stainless steel 304 (SS304) conterfaces under different operating conditions on a pin-on-disc test rig. During testing, the friction coefficient and wear rate were recorded. The topography of worn surfaces was also observed with optical microscope. The average surface roughness of turned and ground mild steel were measured after friction test. The result displays that normal load, sliding speed and the surface conditions of sliding pairs have a distinct effect on the friction and wear behaviour of turned and ground mild steel rubbing against smooth and rough SS304 conterfaces. During this study, the effects of duration of rubbing on friction coefficient are also observed. Friction coefficient and wear rate of four types of disc-pin combinations such as ground-smooth, turned-smooth, ground-rough and turned-rough are observed under different normal loads and sliding velocities. Experimental results reveal that friction coefficient of mild steel for all types of disc-pin combinations decreases with the increase in normal load and sliding velocity.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 12 Issue 3 - Vacuum glazing: Development, design challenges and
           commercialisation
    • Abstract: Simko, T; Collins, RE
      Vacuum glazing is an innovative transparent thermal insulator that has applications in high performance windows. Two sheets of glass are separated by an evacuated space maintained by a regular array of support pillars, and the structure is sealed around the edges with solder glass or a metal bond. The evacuated internal gap reduces the heat transfer across the glazing by eliminating air conduction and convection between the glass sheets. This review paper traces the development of vacuum glazing from the initial proposal 100 years ago, to the first reported manufacture in 1989 by the University of Sydney, the subsequent commercialisation of that design in 1996 and recent advances. The various design challenges are discussed along with the innovative ways they were successfully addressed by two research groups. Several key non-technical factors that have been equally important to the commercialisation and acceptance of this new technology are also presented. The future prospects for vacuum glazing are discussed in the context of the growing interest in energy efficient buildings and higher standards for the thermal performance of windows.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 12 Issue 3 - Abstracts
    • PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 12 Issue 3 - Latest technologies and modern guidelines on gear
           units
    • Abstract: Almasi, A
      There are different configurations and designs available for gear units. The selection of correct design and arrangement of a gear unit for an industrial application to obtain an optimum performance, reliability, and efficiency based on machinery specific conditions and requirements presents challenges to mechanical engineers. Optimum design, manufacturing and configuration of gear units for industrial trains and packages are addressed. Practical notes on conventional gear units, planetary gear units, gear unit reliability and possible failure modes are discussed. Latest technologies and new achievements for gear units are also addressed. A case study for gear units of a fuel gas compressor in a power plant is presented.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 12 Issue 3 - Optimisation method of extrusion dies with a thin and
           complex shape
    • Abstract: Kathirgamanathan, P; Neitzert, T
      Extrusion dies are usually manufactured with a rectangular pocket in front of the actual die opening. Finite element simulations demonstrate that curved or slant shaped pockets can assist in a more homogenous material flow in terms of velocity and shear stresses. An efficient optimisation algorithm has been developed for different pocket widths of slant die pockets. The algorithm incorporates finite element simulations to predict improvements in material flow. An example of a die with a great aspect ratio is presented and compared with experimental results.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 11 Issue 2 - Bright future of micro-turbines: Nuclear emergency
           cooling and miniature generator
    • Abstract: Almasi, A
      Micro-turbines have many advantages over other drivers (for example, piston engine) such as higher power density, less footprint, lighter weight, low emissions, higher availability, better operation, higher reliability, easier maintenance, great fuel flexibility, low dynamic/shaking forces and fewer moving parts (usually only one moving assembly). Old fashion emergency diesel generators and battery systems have been used for decades in critical emergency units such as nuclear emergency cooling systems. They seem unreliable and unsuitable for modern facilities. Advanced micro-turbine is proposed as a reliable, lightweight and compact solution for emergency power supply applications. New applications and modern case studies of micro-turbines for nuclear facility emergency cooling system and miniature generator are explained.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 11 Issue 2 - Recent developments and latest mechanical issues on
           variable speed large electric motor drivers for compressor trains (>50 MW)
           
    • Abstract: Almasi, A
      Large variable speed electric motor drivers (above 50 MW) are required for the modern large compressor trains. Mechanical issues, latest technologies and modern developments for the large electric motors are described. New simulation procedures, findings, mitigation methods and lessons learned on the rotor-dynamic, vibration, torsional issues and coupled mechanicalelectrical effects for the large electric motor drivers are discussed. A case study is presented.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 11 Issue 2 - Modern compressor trains for new technology of
           offshore floating LNG units
    • Abstract: Almasi, A
      This article covers modern refrigeration compressor trains for new technology of offshore floating liquefied natural gas (LNG) units. Aero-derivative or multi-spool gas turbine driven centrifugal compressors, because of compact, light-weight, simple and reliable design, are the best and the optimum configuration for offshore LNG units. Latest achievements, advanced design and modern manufacturing notes of these compressor trains are presented. Case studies for 4, 2 and 0.5 Mt/a offshore LNG modules are discussed.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 11 Issue 2 - Design and development of a low-cost solar tracker
    • Abstract: Ribeiro, SC; do Prado, PPL; Goncalves, JB; de Souza Soares, AM
      To become competitive, ultimately, photovoltaics should have its costs reduced and use photovoltaic systems of greater efficiency. The main steps in this direction are the use of new materials, the improvement in the manufacture of modules and the adoption of techniques of maximum power point tracking and of solar tracking. This article aims at presenting the project and development of an azimuth and elevation solar tracker, based on a new conception of the positioning sensor, composed of an array of four photoresistors. The two direct current motors that operate in the vertical and horizontal axes are controlled by a proportional-integral microcontroller. The conditions of the project were low cost, small energy consumption and versatility. The microcontroller can also incorporate a maximum power point tracking algorithm. The performance of solar tracker prototype in the initial phase of field tests can be considered appropriate.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 11 Issue 2 - Microstructure and mechanical properties of friction
           stir welded 6082-T6 aluminium alloy
    • Abstract: Gopi, S; Manonmani, K
      Aluminium alloy 6082-T6 is vital in the fabrication of light weight structures requiring high strength-to-weight ratio and good corrosion resistance. In this work, investigation is carried out at three different heat energy inputs termed as hot weld (HW), cold weld (CW) and weld at optimum condition (WOC). Heat energy in friction stir welding depends on spindle speed and weld speed. The characteristic study of tensile strength, micro-hardness and metallographic structure at different weld conditions were carried out. Higher heat input, ie. HW, shows fine and harmonised grains, but softening occurred across the weld. Lower heat input, ie. CW, shows better mechanical properties compared with HW, but prone to brittle fracture. The WOC compromises the CW as well as HW and provides better results.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 11 Issue 2 - A quality and efficient tetrahedral mesh generation
           method
    • Abstract: Huang, C; Zhang, J; Liu, L; Li, G
      A method of unstructured tetrahedral mesh generation for general three-dimensional domain of arbitrary shape is presented. The method consists of two steps. First, generating the boundary tetrahedral mesh by the classic Delaunay method, then, using the advancing front method to create internal points and inserting them into the mesh by the Delaunay kernel procedure. The algorithm combines the advantages of the high point placement quality of the advancing front method and the high efficiency and convergence guaranty of the Delaunay algorithm. To get better efficiency, a new front identification and field point generation method is proposed and applied. Several examples have demonstrated the computational efficiency of our method and the high quality of meshes that generated within a reasonable time limit.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 11 Issue 2 - An upper bound analysis of tube extrusion process
           through rotating conical dies
    • Abstract: Haghighat, H; Moradmand, M
      In this paper, an upper bound approach is used to analyse the tube extrusion process through steadily rotating conical dies. The material under deformation in the die and inside the container is divided into four deformation zones. In each deformation zone, a kinematically admissible velocity field is developed to evaluate the internal power, the power dissipated on frictional and velocity discontinuity surfaces and the twist moments generate on frictional surfaces. By equating the total power with the required external power, the extrusion pressure is determined. The tube extrusion process through rotating die is also simulated by using the fi nite element code, ABAQUS. Analytical results are compared with the results given by the fi nite element method. These comparisons show a good agreement.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 11 Issue 2 - Validation of KIVA II simulation results with
           experimental data
    • Abstract: Anetor, L
      A combined study based on laser Doppler velocimetry measurements and numerical simulation was undertaken in order to validate the KIVA II numerical code. A rapid intake and compression machine was used for the experimental studies, while the numerical calculations were performed with the KIVA II computational fluid dynamics code. The k-epsilon turbulence model was used to represent the effects of turbulence. The measured mean radial and tangential velocities were found to be generally higher than their computed counterparts. The differences between these velocities range from 3.5% to 7% in magnitude for the re-entrant bowl chamber while they vary from 5% to 11% for the bowl-in-piston combustion chamber configuration. The measured values of the turbulence intensity close to the bowl axis in the re-entrant bowl chamber configuration were fairly accurately predicted, but the quality of the prediction diminishes as the bowl entrance region was approached. The values of the turbulence intensity were however, poorly reproduced near the axis of the bowl-in-piston chamber assembly. The experimental and predicted values of turbulence were found to differ by between 7% to 20% (re-entrant chamber) and 13% to 20% (bowl-in-piston). The results of the experimental data that were obtained from this study show that the random uncertainties in the mean radial and tangential velocities for both chamber configurations range from +/-13.2% to +/-19.2%, while the uncertainties in the root mean square velocities were about +/-14.1%.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 11 Issue 2 - Finite element modelling to predict cutting parameters
           for milling on titanium alloy (Ti-6Al-4V)
    • Abstract: Ali, MH; Khidhir, BA; Ansari, MNM; Mohamed, B
      Finite element modelling (FEM) is considered a very important tool for estimating the cutting forces and stress-strain analysis because it can produce very accurate results, minimise the costs of manufacturing, and machining time saving as well. The present work predicts the cutting parameters by FEM after conducting the experimental process of titanium alloy (Ti-6Al-4V) by using a face milling operation. In addition, finite element modelling has been proven in simulation of titanium alloy (Ti-6Al-4V) dry cutting. The experimental tests were performed at several axial depths of cut while the feed rate and cutting speed remained constant. The test results led to the conclusion that the axial depth of cut directly affects cutting parameters during the machining process of titanium alloy (Ti-6Al-4V) and thus surface finish during production. The effects on cutting force components are more obvious than on stress and strain components. Besides that, it was found that the axial depth of cut affects the main cutting force more than the feed cutting force.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 11 Issue 2 - Chatter stability and tool wear predictions in the
           presence of chatter vibrations for orthogonal turning process
    • Abstract: Siddhpura, M; Paurobally, R
      The paper focuses on the stability of chatter vibrations and tool wear prediction. Chatter-free (stable) cutting parameters are obtained analytically for a sharp and a worn tool considerations and stability lobes of an orthogonal turning operation are constructed using simulations. The effects of the tool wear on chatter vibrations have been studied widely, but the study of the effects of chatter vibration on tool life is very limited. Tool wear tests are mainly conducted under stable cutting conditions, which really cannot explain the wear behaviour under vibratory cutting conditions. An attempt is made to predict the wear and life of a turning tool under chatter vibrations. A tool wear equation is derived which investigates the effects of self-excited chatter vibrations on tool wear in order to predict the tool life. This new tool wear equation clearly indicates that the tool wear increases very rapidly in the presence of chatter. The proposed analytical model and the tool wear equation have been validated with the orthogonal turning experimental results.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 11 Issue 2 - Preface
    • Abstract: Wittek, Adam
      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 11 Issue 1 - The extrapolation methods for computing Cauchy
           principal value integral on intervals
    • Abstract: Li, J
      The generalised composite rectangle (constant) rule for the computation of Cauchy principle value integral with kernel 1/(x - s) is discussed, and the asymptotic expansion of error function is obtained. Based on the asymptotic expansion, a series is constructed to approach the singular point. An extrapolation algorithm is presented and the convergence rate is proved. At last, some examples are also illustrated to confirm the theoretical results and show the efficiency of the algorithms.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 11 Issue 1 - Chebyshev wavelet method for hypersingular integrals
           on circles and its applications
    • Abstract: Chen, Y; Yi, M; Chen, C
      The numerical algorithm of hypersingular integral is always an important topic in recent years. According to the different definitions of singular integral, we would get the different numerical methods. In this paper, we mainly discuss the approximate value of hypersingular integrals on circle by using the Chebyshev wavelet. A quadrature formula is given by making use of the orthogonality of Chebyshev wavelet and the important formula in generalised function. Then we apply the method to approximate the singular integrals with the Hilert kernel. Two numerical examples are included to demonstrate the validity and applicability of the approach.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 11 Issue 1 - Non-linear quadrature element analysis of composite
           beams with partial interaction
    • Abstract: Shen, ZQ; Zhong, HZ
      Quadrature element formulation for material non-linear analysis of composite beams with partial interaction is derived on the basis of the Newmark kinematical model. The quadrature element method is characterised by direct evaluation of the integrals involved in the variational description of a problem. The number of integration points in a quadrature element is adjustable in accordance with convergence requirement. A representative case is studied and results are compared with finite element solutions. It is shown that high computational accuracy and efficiency are achieved using the quadrature element method.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 11 Issue 1 - Development of complex-variable differentiation method
           and its application in isogeometric analysis
    • Abstract: Hu, JX; Gao, XW
      The complex-variable differentiation method (CVDM) is a very promising method to compute derivatives of complicated functions and is free from cancellation errors which often occur in the finite difference method. In this paper, CVDM is developed for the two-variable situation and is first applied to the isogeometric analysis method in which the computation of derivatives of rational functions represented by non-uniform rational B-splines (NURBS) method is very complicated. An example about h-refinement is given and the computational results show that the derived formulations in the paper is correct and the computation of derivatives using CVDM in isogeometric analysis is much simpler than using the traditional NURBS derivative formula.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 11 Issue 1 - Application of the pFFT algorithm to the hybrid-domain
           boundary element method for acoustic problems
    • Abstract: Yan, ZY; Gao, XW
      The pre-corrected fast Fourier transform (pFFT) algorithm is applied to accelerate the hybrid-domain boundary element method (BEM) for acoustic problems. Based on the previous successful applications of this algorithm to the BEMs for the exterior domain and interior domain acoustic problems, the implementation of this algorithm in the hybrid-domain BEM for acoustic problems is studied in detail. To validate the present method, the simulation on a spherical Helmholtz resonator is carried out. The numerical results are compared with those obtained by the direct multi-domain BEM and the resonance frequency is compared with the corresponding approximate solution. As expected, the present results agree well with those found by the direct BEM. But the remaining problem is that the GMRES solver without a pre-conditioner converges very slowly for the hybrid-domain BEM.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 11 Issue 1 - Application of the boundary face method to solve the
           3D acoustic wave problems
    • Abstract: Wang, X; Zhang, J; Zhou, F
      The boundary face method based on the Burton-Miller equation is applied in this paper to solve radiation and scattering problem of acoustic waves. The present method is referred to as CHBFM. In the CHBFM, the boundary integration and field variables approximation are both performed in the parametric space of each boundary face exactly the same as the B-rep data structure in standard solid modelling packages. The geometric data, such as coordinates and the outward normals at Gaussian integration points are calculated directly from the faces rather than from element interpolation, thus the geometric errors are avoided. The CHBFM has been integrated into the widely used commercial CAD package UG-NX, and thus able to handle problems with complicated geometries. Numerical examples were presented to illustrate the accuracy and validity of the CHBFM. The results have shown that our method has better accuracy than the traditional method with almost the same CPU time when using the same number of elements. In addition, the CAD models, even with complicated geometry, are directly converted into the CHBFM models, thus the present method provides a new way toward automatic simulation.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 11 Issue 1 - Application of the boundary face method for thermal
           analysis in dam construction
    • Abstract: He, J; Zhou, F; Zhang, J; Liu, L; Li, G
      This paper applies the boundary face method (BFM) to solve both steady-state and unsteady-state heat conduction problems in the dam construction. Instead of employing the isoparametric elements as in the boundary and finite element methods, the BFM uses directly geometric models from CAD packages to avoid geometric errors for any complex structures. Moreover, the variable approximations and the boundary integration are all performed in the parametric space of the boundary surfaces, which means that the elements and integral patches are defined in the parametric space. A numerical example of steady-state analysis presented in this paper is a concrete dam structure which consists of several blocks. The example of unsteady-state analysis, which concerns a single block with several holes in it, has also been presented to illustrate the validity and the efficiency of the proposed method.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 11 Issue 1 - Numerical solution of stress intensity factors of
           multiple cracks in great numbers with eigen crack opening displacement
           boundary integral equations
    • Abstract: Ma, H; Guo, Z; Yan, C; Dhanasekar, M
      Based on the eigen crack opening displacement (COD) boundary integral equations (BIEs), a newly developed computational approach is proposed for the analysis of multiple crack problems. The eigen COD particularly refers to a crack in an infinite domain under fictitious traction acting on the crack surface. With the concept of eigen COD, the multiple cracks in great number can be solved by using the conventional displacement discontinuity BIEs in an iterative fashion with a small size of system matrix. The interactions among cracks are dealt with by two parts according to the distances of cracks to the current crack. The strong effects of cracks in adjacent group are treated with the aid of the local Eshelby matrix derived from the traction BIEs in discrete form. While the relatively week effects of cracks in far-field group are treated in the iteration procedures. Numerical examples are provided for the stress intensity factors of multiple cracks, up to several thousands in number, with the proposed approach. By comparing with the analytical solutions in the literature as well as solutions of the dual BIEs, the effectiveness and the efficiencies of the proposed approach are verified.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 11 Issue 1 - Meshless and boundary element methods
    • Abstract: Yao, Zhenhan
      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 10 Issue 2 - Latest gas compressor technologies for modern floating
           production storage and offloading vessels and offshore platforms
    • Abstract: Almasi, A
      A large number of compressors are installed on floating production storage and offloading (FPSO) vessels, offshore platforms and offshore floating production units (FPUs). This article covers latest achievements, modern designs and manufacturing aspects of centrifugal compressor packages for offshore applications. Modern and compact integrally geared compressor applications for FPSO vessels are discussed. Case studies are also presented.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 10 Issue 2 - Monitoring methods to identify damaged, cracked and
           worn rotating machine components
    • Abstract: Almasi, A
      The latest methods, new developments and modern recommendations regarding monitoring of the loose stationary parts (such as loose foundation bolts), the loose rotating parts, the problematic (or worn) bearing, and the cracked rotor using the vibrational data are described. Practical notes and concepts are presented for engineers to quickly understand the key impacts and consequences without numerous graphs and complex mathematics. Three case studies based on the actual field data are also discussed.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 10 Issue 2 - An investigation on gearbox fault detection using
           vibration analysis techniques: A review
    • Abstract: Aherwar, A
      Gears are critical element in a variety of industrial applications such as machine tool and gearboxes. An unexpected failure of the gear may cause significant economic losses. For that reason, fault diagnosis in gears has been the subject of intensive research. Vibration analysis has been used as a predictive maintenance procedure and as a support for machinery maintenance decisions. As a general rule, machines do not breakdown or fail without some form of warning, which is indicated by an increased vibration level. By measuring and analysing the machine's vibration, it is possible to determine both the nature and severity of the defect, and hence predict the machine's failure. The vibration signal of a gearbox carries the signature of the fault in the gears, and early fault detection of the gearbox is possible by analysing the vibration signal using different signal processing techniques. This paper presents a review of a variety of diagnosis techniques that have had demonstrated success when applied to rotating machinery, and highlights fault detection and identification techniques based mainly on vibration analysis approaches. The paper concludes with a brief description of a new approach to diagnosis using neural networks, fuzzy sets, expert system and fault diagnosis based on hybrid artificial intelligence techniques.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 10 Issue 2 - Investigations of surface roughness and flank wear
           behaviour in machining of Inconel 718
    • Abstract: Thirumalai, R; Senthilkumaar, JS; Selvarani, P; Arunachalam, RM; Senthilkumaar, KM
      This paper describes the development of response models such as surface roughness and flank wear for machining Inconel 718. Several experiments are conducted by varying the cutting speed, feed, and depth of cut as machining parameters based on the design of experiments. The surface roughness and flank wear are measured as responses against these parameters. Response optimisation has been presented showing the global solutions for the factors cutting speed, feed and depth of cut and their predicted responses along with the composite desirability of the machining process. Contour plots and surface plots for the responses are also presented. Also this paper is an attempt to Taguchi optimisation technique to study the machinability performances of Inconel 718. Taguchi approach is an efficient and effective experimental method in which a response variable can be optimised, given various control and noise factors, using fewer experiments than a factorial design. An orthogonal array of L27 was used. Signal-to-noise ratio and ANOVA analyses were carried out to identify the significant factors.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 10 Issue 2 - A study of the effects of friction on flank wear and
           the role of friction in tool wear monitoring
    • Abstract: Siddhpura, A; Paurobally, R
      Tool wear is the most commonly observed and unavoidable aspect of metal cutting. The worn tools adversely affect the surface finish of the workpiece, and they can be replaced in time if a tool wear monitoring system is used. During turning, the freshly generated workpiece surface comes into contact with the flank face and friction takes place at the interface. As a result of friction, flank wear occurs. Increasing flank wear results in an increase in the contact area at the flank-workpiece interface. This in turn increases the coefficient of friction, and due to this, stick slip vibration is likely to occur. The modelling of such a system is carried out in this paper. The friction at the flank-workpiece interface is still considered as complex, but the occurrence of stick-slip as a result of flank wear can be utilised to develop tool wear monitoring systems. Most studies regarding friction in metal cutting are limited to the tool-chip interface. This paper outlines a method to correlate flank wear and friction. The equations of motion of the cutting tool are derived considering stick-slip friction taking place at the flank-workpiece interface, and the resulting forces acting on the tool flank are correlated with flank wear. The effect of friction on the tool flank wear is studied using MATLAB simulations and an increase in the amplitude of tool vibration, worn tool cutting forces and coefficient of friction with increasing flank wear were observed. The relationship between the friction and the tool wear derived here can be used to carry out effective tool condition monitoring and tool life prognosis.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 10 Issue 2 - Study of friction stir welding parameters in
           conventional milling machine for 6082-T6 aluminium alloy
    • Abstract: Gopi, S; Manonmani, K
      A conventional milling (CM) machine is capable of inducing the same axial force parameter as that of a friction stir welding (FSW) machine. In a CM machine, tool shoulder penetration, an alternate parameter instead of axial force of FSW machines, was used to carry out FSW joints. The process parameters such as spindle speed, welding speed, shoulder penetration, pin profile and shoulder profile at five levels were studied. With Taguchi orthogonal array, the process parameters were optimised to maximise the tensile strength of the FSW joint. From the investigation, it was found that the 1100 rpm spindle speed, hexagonal pin profile and 0.15 mm shoulder penetration reveals good results. Metallographic studies were carried out with a scanning electron microscope and energy dispersive x-ray spectrometer.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 10 Issue 2 - Comparative study of engine oil tribology, wear and
           combustion characteristics of direct injection compression ignition engine
           fuelled with castor oil biodiesel and diesel fuel
    • Abstract: Arumugam, S; Sriram, G
      In the present work the tribological evaluation of engine oil characteristics, engine wear and engine performance was carried out on a four-stroke single cylinder direct injection diesel engine operated using B20 castor oil biodiesel and diesel fuel separately. The castor biodiesel has very low cloud and pour point that show that this fuel is very suitable for using in extreme winter temperature. Both the engines were subjected to 150-hour long-term endurance test. The engine oil samples collected from the engine at regular intervals of 25 hours were subjected to tribological analyses, namely viscosity, flash and fire point, total acid number (TAN), soot, ash content, water content and wear debris analysis. It was observed that the castor oil methyl ester with diesel blend up to 20% (B20) does not affect the engine oil performance with respect to viscosity, TAN, soot and wear. The performance of castor oil biodiesel is found to be comparable to that of diesel fuel, and the additional lubricity of biodiesel fuel due to higher viscosity as compared to diesel fuel resulted in lower wear of moving parts and thus improved the engine durability.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 10 Issue 2 - Microstructural evolution and mechanical behaviour of
           AA6063/SiCp bulk composites fabricated using friction stir processing
    • Abstract: Puviyarasan, M; Senthil Kumar, VS
      Friction stir processing (FSP) is a simple and effective technique to fabricate aluminium metal matrix composites with uniform particle distribution. In this investigation, AA6063/SiCp bulk composites were fabricated using FSP. Experiments were conducted to study the effect of the feed rate on particle dispersement, hardness and tensile properties. The fabricated composites were observed to have increased micro-hardness and decreased yield strength. Optical and scanning electron microscopy revealed that particles in the matrix are uniformly and widely dispersed, and this contributes to the uniform strength of the composite.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 10 Issue 2 - Effect of lifting device and biomechanical force
           assessment during lifting in steel rolling mill
    • Abstract: Singh, S; Kumar, S
      This paper reports on the investigation of the effect of lifting parameters on compressive and shear forces at the lower back (about the L5/S1 region of the spine). The experimental study is conducted under varying load weights, horizontal location of load from L5/S1 and lifting technique (stoop, full squat and lifting device). For this, the design of experiments approach using Taguchi's orthogonal array is used. The level of importance of the parameters on compressive and shear force is determined using analysis of variance. In the study 8% to 18% reduction in spinal disc compression and 25% to 28% reduction in shear force is observed after applying lifting device.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 10 Issue 2 - Pairing of intelligent design concept method and Kano
           model for product development
    • Abstract: Senthil Kumar, PS; Balasubramanian, S; Suresh, RK
      The deployment of scientific approach to customers' voice by means of customer science to achieve a good product development process. This model means implementing Customer Kano Model for turning the design perception into a precise knowledge as more creative activities from the hidden knowledge of designing using statistical science. The model has been applied to product design process and the results obtained are shown. An application of Kano CAGE model has further given the option of customer centric evaluations and which leads to an optimum product development process. A concept is arrived at and importance is given to Kano model.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 10 Issue 2 - Preface
    • Abstract: Wittek, Adam
      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 10 Issue 1 - Latest techniques and practical notes on anti-surge
           systems for centrifugal compressors
    • Abstract: Almasi, A
      The operating range of process centrifugal compressors is limited by an instability range commonly called "surge", which occurs during low flow or high head conditions and can result in extensive damage. There are high expectations to improve anti-surge systems of process compressors to increase reliability as well as energy efficiencies and performance. Practical recommendations on anti-surge system sizing, selection, configuration and design are presented. Considerations regarding stall, choke, dynamic studies, anti-surge loop configuration, recycle cooling, anti-surge valve, instruments and anti-surge system parameters are also discussed. Case studies are presented.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 10 Issue 1 - Practical notes and latest technologies on modern
           centrifugal compressor component and system selection
    • Abstract: Almasi, A
      Practical recommendations on modern compressor casing, impellers, shaft, internals, material selection, control system, surge prevention systems, diaphragms, casing connections, nozzle loads, bearing, and balance piston are explained. This article highlights the lessons learned from several industrial experiences in relation to the selection, design and manufacturing of compressor components especially critical parts such as dry gas seals, seal support systems, control units and surge prevention systems for the centrifugal compressors. Particularly the tandem type seal is discussed in detail. Case studies are presented.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 10 Issue 1 - Process analysis of abrasive jet micromachining for
           brittle materials
    • Abstract: Li, HZ
      Abrasive jet micromachining (AJM) is a non-traditional machining process based on the erosion of substrates by an abrasive-laden air jet. It is a promising machining technique for the cost effective fabrication of micro-devices from brittle and hard materials. For the machining process to be more efficient and better predictable, mathematical models for the AJM process are necessary. This paper presented an analysis of the AJM process for brittle materials. The analysis is based on a fundamental erosion model of solid particle impact for brittle materials, and a recently developed model for the particle velocity in micro-abrasive jet, to form a mathematical basis for AJM process modelling and optimisation. Experimental study on the flow characteristics and the effects of some important process parameters are also given.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 10 Issue 1 - Effect of cross-sectional geometry on superelasticity
           of helical nanobelts
    • Abstract: Li, N; Cui, Y; Fu, D
      The shape memory effect (SME) and the superelasticity make nanoscale chiral structures such as helical ZnO nanobelts promising for a wide range of important applications. In this paper, based on the non-linear rod model with surface effect (Wang et al, 2011), the effects of surfaces and geometrical size of the cross-section on the superelasticity of the helical nanobelts have been investigated quantitatively. Our results demonstrate the superelasticity of helical nanobelts exhibit a distinct size effect, depending on the cross-sectional geometry. We also show the efficiency of the energy storage and retrieval of the helical nanobelts induced by the superelasticity depends strongly on the cross-sectional geometry.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 10 Issue 1 - Improving accuracy of opening-mode stress intensity
           factor in two-dimensional media using fundamental solution based finite
           element model
    • Abstract: Wang, H; Qin, Q-H; Yao, W
      A hybrid finite element method (FEM) is developed for determining stress intensity factor of opening-mode cracks. The model is based on fundamental solutions and higherorder displacement extrapolation. In the present formulation, linear combination of fundamental solutions and shape functions are respectively used to approximate the element interior and frame fields. The equality of the two approximations is enforced through a hybrid functional and element boundary integrals are involved only. Numerical examples are considered to investigate effects of element size, number of elements and crack length on crack tip singularity. Results show that the proposed approach can achieve better numerical accuracy than conventional FEM.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 10 Issue 1 - Combustion chamber geometry effects in spark ignition
           engine exhaust emissions
    • Abstract: Zefaan, H
      The paper presents experimental results showing the effect of hemispherical, cylindrical and oval bowls-in-piston on exhaust gases within the cylinder of spark ignition engines. Results indicate that bowls increase both heat transfer and flame speed. Consequently, flame ability must become wide to reduce both engine emissions and cycle combustion variability. Hemispherical effect ranked first on hydrocarbon and carbon monoxide emissions, followed by cylindrical then oval. Nitrogen oxides are in opposite direction, with oval ranked first, followed by cylindrical then hemispherical.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 10 Issue 1 - Mathematical approach for optimal machining fixture
           layout and clamping forces
    • Abstract: Selvakumar, S; Arulshri, KP; Padmanaban, KP; Sasikumar, KSK
      Machining fixtures are used to locate and constrain a workpiece during machining operation. An ideal fixture design exhibits minimal moment while machining. The purpose of this work is to design an optimum fixture layout in order to reduce the maximum elastic deformation of the workpiece by reducing the moment caused by the clamping and machining forces acting on the workpiece while machining. This can be achieved by selecting the optimal locations of fixturing elements such as locators and clamps. The objective equations are formed based on equilibrium conditions and are solved for minimum value of clamping force condition for various fixture layouts. The required equations are formulated based on the equilibrium conditions of forces, moments and stick/slip conditions. Then these equations are solved for several fixture layouts and the corresponding clamping force sets are found. Thus the clamping forces satisfying constraints, along with its respective layout are solved for deformation values using ANSYS software. Layout providing minimum deformation value is selected as the optimal one.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 10 Issue 1 - Experimental investigation on the effect of applied
           pressure on microstructure and mechanical properties of squeeze cast AC2A
           aluminium alloy
    • Abstract: Senthil, P; Amirthagadeswaran, KS
      This investigation focuses on the attempt made to prepare AC2A castings of a non-symmetrical component through squeeze casting process. Samples were produced to study the effect of squeeze pressures (0.1, 25, 50, 75, 100 and 125 MPa) on microstructure and mechanical properties of the alloy. Results of hardness and tensile tests indicated that squeeze cast specimens exhibited higher mechanical properties than gravity die cast specimens. This was mainly due to applied pressure which resulted in effective filling of the melt into die cavity, microstructural refinement and good heat transfer between the melt and the die. Pressure of 50 MPa was found to be sufficient for pore free castings and pressure of 100 MPa was noted for sound castings. From this study, the squeeze casting process is noted to be suitable for processing this alloy.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 10 Issue 1 - Anomalous sub-diffusion equations by the meshless
           collocation method
    • Abstract: Gu, YT; Zhuang, P
      Recently, many new applications in engineering and science are governed by a series of fractional ordinary differential equations or fractional partial differential equations (FPDEs), in which the differential order is with a fractional order. The anomalous sub-diffusion equation (ASDE) is a typical FPDE. The current dominant numerical method for modelling ASDE is finite difference method, which is based on a pre-defined grid leading to inherited issues or shortcomings. Because of its distinguished advantages, the meshless method has good potential in simulation of ASDE. This paper aims to develop an implicit meshless collocation technique based on the moving least squares (MLS) approximation for numerical simulation of ASDE. The discrete system of equations is obtained by using the MLS meshless shape functions and the meshless collocation formulation. The stability and convergence of this meshless approach related to the time discretisation are investigated theoretically and numerically. The numerical examples with regular and irregular nodal distributions are used to validate and investigate accuracy and efficiency of the newly developed meshless formulation. It is concluded that the present meshless formulation is very effective for the modelling and simulation of ASDEs.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 9 Issue 2 - Latest technologies of rotating machine lubrication and
           lubricant selection
    • Abstract: Almasi, A
      Practical notes and latest achievements on lubrication of rotating machines, including reciprocating compressors, screw compressors, centrifugal compressors, axial compressors, steam turbines, gas turbines, engines, pumps, electrical motors and generators, are discussed. Also recommendations about mineral oils, synthetic oils, synthesised hydrocarbon lubricants, gear unit lubrication and bearing lubrication are presented. Moreover, practical recommendations on correct lubrication oil selection, modern lubrication oil systems and effective lubricant change-over are described. Some case studies are also presented.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 9 Issue 2 - Advanced methods for shop performance tests of process
           centrifugal compressors
    • Abstract: Almasi, A
      Centrifugal compressor purchasers and end-users realise the value and payback of accurate and proper shop performance test and shop mechanical run test. Shop test is a necessary step for centrifugal compressor future reliability and trouble free operation. Procedures and methods to correctly implement shop performance test and shop mechanical run test of process centrifugal performance are discussed. ASME-PTC-10 type 1 performance test should be done wherever possible. Otherwise arrangement and details of ASME-PTC-10 type 2 performance test, as close to specified operating condition as possible, should be fixed before machine order.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 9 Issue 2 - Reducing non-stick on pad for wire bond: A review
    • Abstract: Sethu, RS
      One of the largest losses in semiconductor assembly operations is non-stick on pad (NSOP) failures. NSOP failures are costly as the entire device will need to be rejected if there is one such failure on any bond pad. The review is aimed to look at the failure modes associated with poor bond pad quality, its causes and effects, and the known detection/prevention methods.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 9 Issue 2 - Construction of the marginal abatement cost curve:
           Retrofitting carbon capture and storage in Australia
    • Abstract: West, J
      Marginal abatement cost curves are a principal tool used for measuring the relative economic impact of emissions abatement mechanisms. Abatement curves can be constructed using either a top-down approach based on aggregated microeconomic models or using a bottom-up approach based on an engineering assessment that analyses different technical potentials for emission reductions. While top-down models offer simplicity and ease of interpretation, they are not as robust as the bottom-up approach, particularly for assessing the implications of new technologies such as carbon capture and storage (CCS). Using a bottom-up approach and incorporating real options analysis, this study redefines the relative abatement costs for retrofitting post-combustion CCS technology to coal-fired generators and then reconstructs the Australian marginal emissions abatement curve. The revised curve provides power generators and other industry sectors with more accurate and stable abatement cost estimates for these technologies relative to alternate abatement options.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 9 Issue 2 - A simple CAD method for constructing sand-heap
           formations as an analogous means of determining the fully plastic torque
           capacity of various structural sections
    • Abstract: Bardell, NS; Evans, GJ
      A brief review is presented of the sand-heap analogy as a means of determining the ultimate plastic torque capacity of a ductile metallic prismatic bar of known cross-section. A novel method using an industry-standard computer-aided design (CAD) tool is then described for determining the shape and corresponding sand-heap volume for a general cross-section that can include the presence of keyways, fillets, rebates, and holes. Existing solutions for simple regular cross-section shapes are used as a benchmark for the solutions from the new method, and perfect agreement is found. Subsequent examples are presented which demonstrate the ease with which sand-heap formations and their corresponding volumes can be found for more general cross-sections that are more representative of those used in practical engineering applications.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 9 Issue 2 - Simulation of viscous and viscoelastic flows using a
           RBF-galerkin approach
    • Abstract: Ho-Minh, D; Mai-Duy, N; Tran-Cong, T
      In this paper, two-dimensional flows of viscous and viscoelastic fluids are simulated using radial-basis-function networks (RBFNs) and Cartesian grids. To solve the governing equations, high-order approximations based on one-dimensional integrated-RBFNs are employed to approximate the field variables and the Galerkin discretisation formulation is utilised to transform the differential equation into a set of algebraic equations. The main distinguishing feature of the above combination is that two processes, namely the representation of the field variables and the discretisation of the governing equations, are both based on integration. In sharp contrast to conventional Galerkin methods, derivative boundary conditions are presently imposed in an exact manner. Two test problems, namely natural convection of a Newtonian fluid in a concentric annulus and fully-developed flow of an Criminale-Ericksen-Filbey (CEF) fluid in a rectangular duct, are studied. Results obtained are compared with published data in the literature.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 9 Issue 2 - Characteristics of interlaminar stresses for damages in
           adhesively-bonded composite single lap joints
    • Abstract: Panigrahi, SK; Zhang, YX
      In this paper three-dimensional non-linear finite element analyses are carried out to evaluate accurately the stresses over the different critical surfaces for adhesion failure, cohesion failure and delamination damages of an adhesively-bonded fibre-reinforced polymer (FRP) composite single lap joint (SLJ) subjected to an in-plane loading. The top and bottom adherends of the SLJ are formed by eight layers of unidirectional graphite FRP composite and the material of the adhesive is epoxy. The out-of-plane stresses and their distribution over the critical surfaces are presented, and conclusions about the damages and failures for the adhesively-bonded composite SLJ are drawn.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 9 Issue 1 - New technology of subsea and offshore direct drive
           compressor with magnetic bearing
    • Abstract: Almasi, Amin
      Subsea compressor offers tremendous potentials, but also some obstacles. Using magnetic bearings can eliminate lubrication oil system as well as seal system. High-speed permanentmagnet electrical-motor direct-drive technology allows centrifugal compressor to meet optimum speed, eliminating gear box. This design offers inherent machinery health monitoring features and very compact and reliable train. New technology of hermetically sealed direct drive centrifugal compressor for offshore and subsea applications are reviewed and discussed. Latest technologies and modern achievements on direct drive compressor designs, magnetic bearings, permanent magnet motors, cooling systems and train arrangements are reviewed. Case studies for horizontal and vertical compressor trains are presented.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
  • Volume 9 Issue 1 - Advances in driver selection and compressor
           arrangements of LNG plants
    • Abstract: Almasi, Amin
      This article presents practical notes and guidelines on driver type, power management and compressor train arrangement for LNG plants. Electrical motor driven refrigeration trains are used successfully in small and medium size LNG facilities and many operators are investigating to use this technology for large LNG modules. Optimum compressor and driver arrangement for LNG plants are discussed. Evaluations show overall installation and operation costs of the gas turbine driven refrigeration system and electrical motor driven trains is close to each other. Case studies are presented.

      PubDate: Thu, 2 Nov 2017 11:47:41 GMT
       
 
 
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