Subjects -> ENGINEERING (Total: 2918 journals)
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    - ENGINEERING (1464 journals)
    - ENGINEERING MECHANICS AND MATERIALS (476 journals)
    - HYDRAULIC ENGINEERING (60 journals)
    - INDUSTRIAL ENGINEERING (101 journals)
    - MECHANICAL ENGINEERING (121 journals)

ENGINEERING (1464 journals)                  1 2 3 4 5 6 7 8 | Last

Showing 1 - 200 of 1205 Journals sorted alphabetically
3 Biotech     Open Access   (Followers: 9)
3D Research     Hybrid Journal   (Followers: 22)
AAPG Bulletin     Hybrid Journal   (Followers: 11)
Abstract and Applied Analysis     Open Access   (Followers: 4)
Aceh International Journal of Science and Technology     Open Access   (Followers: 9)
ACS Nano     Hybrid Journal   (Followers: 448)
Acta Geotechnica     Hybrid Journal   (Followers: 7)
Acta Metallurgica Sinica (English Letters)     Hybrid Journal   (Followers: 10)
Acta Nova     Open Access   (Followers: 1)
Acta Polytechnica : Journal of Advanced Engineering     Open Access   (Followers: 4)
Acta Scientiarum. Technology     Open Access   (Followers: 3)
Acta Universitatis Cibiniensis. Technical Series     Open Access   (Followers: 1)
Active and Passive Electronic Components     Open Access   (Followers: 8)
Adaptive Behavior     Hybrid Journal   (Followers: 9)
Adsorption     Hybrid Journal   (Followers: 5)
Advanced Energy and Sustainability Research     Open Access   (Followers: 7)
Advanced Engineering Forum     Full-text available via subscription   (Followers: 14)
Advanced Engineering Research     Open Access  
Advanced Journal of Graduate Research     Open Access   (Followers: 4)
Advanced Quantum Technologies     Hybrid Journal   (Followers: 1)
Advanced Science     Open Access   (Followers: 13)
Advanced Science Focus     Free   (Followers: 7)
Advanced Science Letters     Full-text available via subscription   (Followers: 13)
Advanced Science, Engineering and Medicine     Partially Free   (Followers: 11)
Advanced Synthesis & Catalysis     Hybrid Journal   (Followers: 20)
Advanced Theory and Simulations     Hybrid Journal   (Followers: 5)
Advances in Catalysis     Full-text available via subscription   (Followers: 8)
Advances in Complex Systems     Hybrid Journal   (Followers: 12)
Advances in Engineering Software     Hybrid Journal   (Followers: 31)
Advances in Fuel Cells     Full-text available via subscription   (Followers: 20)
Advances in Fuzzy Systems     Open Access   (Followers: 5)
Advances in Geosciences (ADGEO)     Open Access   (Followers: 22)
Advances in Heat Transfer     Full-text available via subscription   (Followers: 30)
Advances in Human Factors/Ergonomics     Full-text available via subscription   (Followers: 27)
Advances in Magnetic and Optical Resonance     Full-text available via subscription   (Followers: 10)
Advances in Natural Sciences : Nanoscience and Nanotechnology     Open Access   (Followers: 36)
Advances in Operations Research     Open Access   (Followers: 14)
Advances in OptoElectronics     Open Access   (Followers: 6)
Advances in Physics Theories and Applications     Open Access   (Followers: 21)
Advances in Polymer Science     Hybrid Journal   (Followers: 53)
Advances in Porous Media     Full-text available via subscription   (Followers: 6)
Advances in Remote Sensing     Open Access   (Followers: 58)
Advances in Science and Research (ASR)     Open Access   (Followers: 8)
Aerobiologia     Hybrid Journal   (Followers: 4)
Aerospace Systems     Hybrid Journal   (Followers: 10)
African Journal of Science, Technology, Innovation and Development     Hybrid Journal   (Followers: 8)
AIChE Journal     Hybrid Journal   (Followers: 38)
Ain Shams Engineering Journal     Open Access   (Followers: 7)
Al-Nahrain Journal for Engineering Sciences     Open Access  
Al-Qadisiya Journal for Engineering Sciences     Open Access   (Followers: 2)
AL-Rafdain Engineering Journal     Open Access   (Followers: 3)
Alexandria Engineering Journal     Open Access   (Followers: 3)
AMB Express     Open Access   (Followers: 1)
American Journal of Applied Sciences     Open Access   (Followers: 27)
American Journal of Engineering and Applied Sciences     Open Access   (Followers: 12)
American Journal of Engineering Education     Open Access   (Followers: 20)
American Journal of Environmental Engineering     Open Access   (Followers: 16)
American Journal of Industrial and Business Management     Open Access   (Followers: 31)
Annals of Civil and Environmental Engineering     Open Access   (Followers: 3)
Annals of Combinatorics     Hybrid Journal   (Followers: 3)
Annals of Pure and Applied Logic     Open Access   (Followers: 6)
Annals of Regional Science     Hybrid Journal   (Followers: 10)
Annals of Science     Hybrid Journal   (Followers: 10)
Annual Journal of Technical University of Varna     Open Access   (Followers: 1)
Antarctic Science     Hybrid Journal   (Followers: 1)
Applicable Algebra in Engineering, Communication and Computing     Hybrid Journal   (Followers: 3)
Applicable Analysis: An International Journal     Hybrid Journal   (Followers: 2)
Applications in Energy and Combustion Science     Open Access   (Followers: 2)
Applications in Engineering Science     Open Access   (Followers: 1)
Applied Catalysis A: General     Hybrid Journal   (Followers: 8)
Applied Catalysis B: Environmental     Hybrid Journal   (Followers: 22)
Applied Clay Science     Hybrid Journal   (Followers: 6)
Applied Computational Intelligence and Soft Computing     Open Access   (Followers: 16)
Applied Engineering Letters     Open Access   (Followers: 4)
Applied Magnetic Resonance     Hybrid Journal   (Followers: 4)
Applied Nanoscience     Open Access   (Followers: 11)
Applied Network Science     Open Access   (Followers: 3)
Applied Numerical Mathematics     Hybrid Journal   (Followers: 6)
Applied Physics Research     Open Access   (Followers: 7)
Applied Sciences     Open Access   (Followers: 6)
Applied Spatial Analysis and Policy     Hybrid Journal   (Followers: 6)
Arab Journal of Basic and Applied Sciences     Open Access  
Arabian Journal for Science and Engineering     Hybrid Journal   (Followers: 5)
Archives of Computational Methods in Engineering     Hybrid Journal   (Followers: 6)
Archives of Thermodynamics     Open Access   (Followers: 13)
Arctic     Open Access   (Followers: 7)
Arid Zone Journal of Engineering, Technology and Environment     Open Access   (Followers: 2)
Arkiv för Matematik     Hybrid Journal   (Followers: 1)
ArtefaCToS : Revista de estudios sobre la ciencia y la tecnología     Open Access   (Followers: 1)
Asia-Pacific Journal of Science and Technology     Open Access  
Asian Engineering Review     Open Access  
Asian Journal of Applied Science and Engineering     Open Access   (Followers: 2)
Asian Journal of Applied Sciences     Open Access   (Followers: 2)
Asian Journal of Biotechnology     Open Access   (Followers: 9)
Asian Journal of Control     Hybrid Journal  
Asian Journal of Technology Innovation     Hybrid Journal   (Followers: 7)
Assembly Automation     Hybrid Journal   (Followers: 2)
ATZagenda     Hybrid Journal  
ATZextra worldwide     Hybrid Journal  
AURUM : Mühendislik Sistemleri ve Mimarlık Dergisi = Aurum Journal of Engineering Systems and Architecture     Open Access   (Followers: 1)
Australasian Journal of Engineering Education     Hybrid Journal   (Followers: 3)
Australasian Physical & Engineering Sciences in Medicine     Hybrid Journal   (Followers: 1)
Australian Journal of Multi-Disciplinary Engineering     Hybrid Journal   (Followers: 2)
Autocracy : Jurnal Otomasi, Kendali, dan Aplikasi Industri     Open Access  
Automotive and Engine Technology     Hybrid Journal  
Automotive Experiences     Open Access  
Automotive Innovation     Hybrid Journal   (Followers: 1)
Avances en Ciencias e Ingenierías     Open Access  
Avances: Investigación en Ingeniería     Open Access   (Followers: 6)
Balkan Region Conference on Engineering and Business Education     Open Access   (Followers: 2)
Bangladesh Journal of Scientific and Industrial Research     Open Access  
Basin Research     Hybrid Journal   (Followers: 6)
Batteries     Open Access   (Followers: 11)
Batteries & Supercaps     Hybrid Journal   (Followers: 7)
Bautechnik     Hybrid Journal   (Followers: 3)
Bell Labs Technical Journal     Hybrid Journal   (Followers: 29)
Beni-Suef University Journal of Basic and Applied Sciences     Open Access   (Followers: 3)
Beyond : Undergraduate Research Journal     Open Access  
Bhakti Persada : Jurnal Aplikasi IPTEKS     Open Access  
Bharatiya Vaigyanik evam Audyogik Anusandhan Patrika (BVAAP)     Open Access   (Followers: 1)
Bilge International Journal of Science and Technology Research     Open Access   (Followers: 1)
Biointerphases     Open Access   (Followers: 1)
Biomaterials Science     Full-text available via subscription   (Followers: 14)
Biomedical Engineering     Hybrid Journal   (Followers: 15)
Biomedical Engineering and Computational Biology     Open Access   (Followers: 13)
Biomedical Engineering Letters     Hybrid Journal   (Followers: 5)
Biomedical Engineering: Applications, Basis and Communications     Hybrid Journal   (Followers: 5)
Biomedical Microdevices     Hybrid Journal   (Followers: 8)
Biomedical Science and Engineering     Open Access   (Followers: 7)
Biomicrofluidics     Open Access   (Followers: 7)
Biotechnology Progress     Hybrid Journal   (Followers: 44)
Black Sea Journal of Engineering and Science     Open Access  
Botswana Journal of Technology     Full-text available via subscription   (Followers: 1)
Boundary Value Problems     Open Access   (Followers: 1)
Brazilian Journal of Science and Technology     Open Access   (Followers: 2)
Bulletin of Canadian Petroleum Geology     Full-text available via subscription   (Followers: 13)
Bulletin of Engineering Geology and the Environment     Hybrid Journal   (Followers: 15)
Bulletin of the Crimean Astrophysical Observatory     Hybrid Journal  
Cahiers Droit, Sciences & Technologies     Open Access   (Followers: 1)
Calphad     Hybrid Journal   (Followers: 2)
Canadian Geotechnical Journal     Hybrid Journal   (Followers: 30)
Canadian Journal of Remote Sensing     Full-text available via subscription   (Followers: 50)
Carbon Resources Conversion     Open Access   (Followers: 3)
Carpathian Journal of Electronic and Computer Engineering     Open Access  
Case Studies in Engineering Failure Analysis     Open Access   (Followers: 6)
Case Studies in Thermal Engineering     Open Access   (Followers: 8)
Catalysis Communications     Hybrid Journal   (Followers: 7)
Catalysis Letters     Hybrid Journal   (Followers: 3)
Catalysis Reviews: Science and Engineering     Hybrid Journal   (Followers: 9)
Catalysis Science and Technology     Hybrid Journal   (Followers: 13)
Catalysis Surveys from Asia     Hybrid Journal   (Followers: 4)
Catalysis Today     Hybrid Journal   (Followers: 8)
CEAS Space Journal     Hybrid Journal   (Followers: 6)
Cell Reports Physical Science     Open Access  
Cellular and Molecular Neurobiology     Hybrid Journal   (Followers: 2)
Central European Journal of Engineering     Hybrid Journal  
Chaos : An Interdisciplinary Journal of Nonlinear Science     Hybrid Journal   (Followers: 3)
Chaos, Solitons & Fractals     Hybrid Journal   (Followers: 3)
Chaos, Solitons & Fractals : X     Open Access   (Followers: 1)
Chinese Journal of Catalysis     Full-text available via subscription   (Followers: 3)
Chinese Journal of Engineering     Open Access   (Followers: 2)
Chinese Journal of Population, Resources and Environment     Open Access  
Chinese Science Bulletin     Open Access   (Followers: 1)
Ciencia e Ingenieria Neogranadina     Open Access  
Ciencia en su PC     Open Access   (Followers: 1)
Ciencia y Tecnología     Open Access  
Ciencias Holguin     Open Access   (Followers: 2)
CienciaUAT     Open Access   (Followers: 1)
Cientifica     Open Access  
CIRP Annals - Manufacturing Technology     Hybrid Journal   (Followers: 11)
CIRP Journal of Manufacturing Science and Technology     Hybrid Journal   (Followers: 14)
City, Culture and Society     Hybrid Journal   (Followers: 27)
Clay Minerals     Hybrid Journal   (Followers: 9)
Coal Science and Technology     Full-text available via subscription   (Followers: 4)
Coastal Engineering     Hybrid Journal   (Followers: 14)
Coastal Engineering Journal     Hybrid Journal   (Followers: 9)
Coastal Engineering Proceedings : Proceedings of the International Conference on Coastal Engineering     Open Access   (Followers: 2)
Coastal Management     Hybrid Journal   (Followers: 30)
Coatings     Open Access   (Followers: 4)
Cogent Engineering     Open Access   (Followers: 3)
Cognitive Computation     Hybrid Journal   (Followers: 3)
Color Research & Application     Hybrid Journal   (Followers: 4)
COMBINATORICA     Hybrid Journal  
Combustion Theory and Modelling     Hybrid Journal   (Followers: 17)
Combustion, Explosion, and Shock Waves     Hybrid Journal   (Followers: 20)
Communications Faculty of Sciences University of Ankara Series A2-A3 Physical Sciences and Engineering     Open Access  
Communications in Numerical Methods in Engineering     Hybrid Journal   (Followers: 2)
Components, Packaging and Manufacturing Technology, IEEE Transactions on     Hybrid Journal   (Followers: 28)
Composite Interfaces     Hybrid Journal   (Followers: 10)
Composite Structures     Hybrid Journal   (Followers: 334)
Composites Part A : Applied Science and Manufacturing     Hybrid Journal   (Followers: 276)
Composites Part B : Engineering     Hybrid Journal   (Followers: 311)
Composites Part C : Open Access     Open Access   (Followers: 3)
Composites Science and Technology     Hybrid Journal   (Followers: 245)
Comptes Rendus : Mécanique     Open Access   (Followers: 2)
Computation     Open Access   (Followers: 1)
Computational Geosciences     Hybrid Journal   (Followers: 20)
Computational Optimization and Applications     Hybrid Journal   (Followers: 11)
Computer Applications in Engineering Education     Hybrid Journal   (Followers: 6)
Computer Science and Engineering     Open Access   (Followers: 20)

        1 2 3 4 5 6 7 8 | Last

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Journal Cover
Advanced Engineering Forum
Number of Followers: 14  
 
  Full-text available via subscription Subscription journal
ISSN (Print) 2234-9898 - ISSN (Online) 2234-991X
Published by Scientific.Net Homepage  [14 journals]
  • Effect of Aqueous Milling on the Total Carbon Content of Hard Metal
           Powders

    • Free pre-print version: Loading...

      Abstract: Publication date: 7 September 2021
      Source: Advanced Engineering Forum Vol. 42
      Author(s): Horea Florin Chicinaş, Darius Ovidiu Jucan, Glad Contiu, Cătălin Popa
      Materials consisting of a hard phase, usually WC, and a tough binder, traditionally Co, form the most successful class of composite materials, also known as Hard Metals (HM) or Cemented Carbides. Powder metallurgy routes are employed generally for the production of such [1]. The typical processing route of such materials involves mixing the components, kneading and consolidation. Alcohols, alkanes and alkenes are commonly used to limit any excessive heating and oxidation of powders during mixing the components. In this study, we report the results of milling in a more environmentally friendly aqueous milling media. The obtained results are presented comparatively with milling under a traditional media, such as isohexane and acetone. The characterization of the milled samples has been done from the structural, compositional and morphological point of view. Considering our previous results, an important aspect of the milled powder is the carbon content, which dictates the sintering behavior of such parts. The carbon balance investigation performed on a carbon analyzer has revealed no significant differences upon changing the milling media. This work emphasizes the influence of the milling media on the HM powder. HM powders with similar properties have been obtained both by traditional and aqueous milling. The comparative study has revealed that the substitution of the traditional milling media does not influence the carbon content in the HM powder.


      PubDate: Tue, 7 Sep 2021 00:00:00 +0200
       
  • The Masteralloy Concept for Sintered Steels - New Impetus for a Classical
           Approach

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      Abstract: Publication date: 7 September 2021
      Source: Advanced Engineering Forum Vol. 42
      Author(s): Herbert Danninger, Raquel de Oro Calderon, Stefan Geroldinger, Christian Gierl-Mayer, John J. Dunkley
      Among the various alloying techniques used in powder metallurgy, the masteralloy concept has been known for a long time. However, its use for production of ferrous precision parts has been hampered by several obstacles such as poor output of the useful fine fractions, high tool wear and slow homogenization kinetics of the alloy elements in the matrix. On the other hand, the masteralloy concept is particularly interesting for introducing cost-effective alloy elements such as Cr, Mn and Si since the masteralloy approach at least alleviates the problems caused by the high oxygen affinity of these elements. In the present study it is shown that recent developments have given a boost to this classical concept, one of these developments being powder manufacturing by high pressure water atomization which dramatically increases the yield of fine masteralloy fractions. The other progress is availability of thermodynamic software that enables defining masteralloy compositions with low melting range and thus fast homogenization also at moderate sintering temperatures. Combined, these new developments open the door for implementation of the masteralloy route in large scale PM parts production.


      PubDate: Tue, 7 Sep 2021 00:00:00 +0200
       
  • Applying the Masteralloy Concept for Manufacturing of Sinter Hardening PM
           Steel Grades

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      Abstract: Publication date: 7 September 2021
      Source: Advanced Engineering Forum Vol. 42
      Author(s): Stefan Geroldinger, Raquel de Oro Calderon, Christian Gierl-Mayer, Herbert Danninger
      Sinter hardening is a powder metallurgy processing route that combines the sintering and the heat treating processes in one step by gas quenching the components immediately after they have left the high temperature zone of the furnace. It is both economically attractive and ecologically beneficial since it renders deoiling processes unnecessary. The slower cooling rates associated with gas compared to oil quenching however requires special alloy concepts different to those known from wrought steels. In the present study it is shown that by admixing atomized masteralloy powders consisting of suitable combinations of Mn, Cr, Si, Fe and C to base iron or pre-alloyed steel powders, sinter hardening PM steel grades can be produced that transform to martensitic microstructure at cooling rates of 2-3 K/s as typical for industrial sinter hardening. This is confirmed by CCT diagrams and hardness measurements. However, metallographic investigations are also necessary because in sintered steels, the cores of the largest base powder particles are alloyed very slowly during sintering and therefore tend to result in soft spots in the sinter hardened microstructure which are mostly not discernible in the CCT diagrams. Here, even slight pre-alloying of the base powder with Mo and/or Cr is helpful, both increasing the hardenability of the steels compared to base plain iron and avoiding soft spots in the microstructure.


      PubDate: Tue, 7 Sep 2021 00:00:00 +0200
       
  • Researches about the Dynamic Behavior of Green Composites Reinforced with
           Rush and Bulrush

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      Abstract: Publication date: 7 September 2021
      Source: Advanced Engineering Forum Vol. 42
      Author(s): Alexandru Ioan Rădoi, Cosmin Mihai Miriţoiu, Mihaela Bogdan, Marius Marinel Stănescu, Dumitru Bolcu, Ionuţ Daniel Geonea
      The paper presents some researches about the dynamic mechanical properties for some green composites made as follows: the reinforcement is made from rush and bulrush and the matrix is from epoxy resin Resoltech 1050 with its hardener Resoltech 1055. The dynamic parameters were determined from the bars free vibrations. In the first part of the paper, there are presented the mathematical calculus formulas used for the dynamic parameters determination based on the experimental recordings for the free vibrations. The next experimental montage was used: the bars were clamped at one end and were left free at the other end. At the free end, a Bruel&Kjaer accelerometer with 0.04 pC/ms-2 sensitivity was placed in order to record the beams dynamic response. A force was applied at the free end to bend the beams and after bending, the force was cancelled and the beams were left to freely vibrate. The accelerometer was connected to a signal conditioner Nexus and the signal conditioner was connected to a data acquisition system SPIDER 8 made by Hottinger Baldwin Messtec. The acquisition system was connected to a notebook ant the experimental parameters were obtained through CATMAN EASY software. From the free vibrations recording, the following mechanical parameters were determined: the eigenfrequency of the first eigenmode and the damping factors per unit mass. With these values, we have determined some direct calculus formulas for the damping factor per unit mass.


      PubDate: Tue, 7 Sep 2021 00:00:00 +0200
       
  • About the Mechanical Properties for Composites Reinforced with Felt

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      Abstract: Publication date: 7 September 2021
      Source: Advanced Engineering Forum Vol. 42
      Author(s): Alexandru Ioan Rădoi, Cosmin Mihai Miriţoiu, Alexandru Bolcu, Valeriu Ionică, Alina Elena Romanescu, Adriana Paula Pădeanu
      In this paper we present some researches about the static mechanical properties for some composites made in this way: the reinforcement is made from two types of felt and the matrix is from epoxy resin Resoltech 1050 with its hardener Resoltech 1055. There are built some plates from felt/epoxy resin and from these plates there are cut some samples. The samples are tensile loaded on an universal testing machine Instron 1000 HDX which is assisted by a BlueHill software. There are determined the next mechanical properties: Young modulus, yield strength, elongation at break and breaking strength. By using an optical microscope, there are presented some images with the breaking sections.


      PubDate: Tue, 7 Sep 2021 00:00:00 +0200
       
  • Influence of the Shape of Composites Materials on the Stability of
           Microwave Heating Processes

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      Abstract: Publication date: 7 September 2021
      Source: Advanced Engineering Forum Vol. 42
      Author(s): Robert Cristian Marin, Iulian Ştefan, Mihaela Cristina Predescu, Sorin Vasile Savu
      This paper aims to present preliminary researches on the influence of the shape and dimensions of composites materials on the stability of microwave heating. The research was focused on cordierite composite material, which is used as ceramic substrate in selective catalytic reaction for reduction of nitrogen oxide emissions from combustion engines. For experimental program were used different shapes for cordierite material, such as cubic, cylindrical, sphere and rectangular. Based on previous researches where it was demonstrated that an injected microwave power between 600 W and 1200 W, the samples were heated in order to establish which shape is more suitable for fast heating, thermal stability in terms of thermal runaway as well as for avoiding the unwanted microwave plasma initiation.


      PubDate: Tue, 7 Sep 2021 00:00:00 +0200
       
  • Investigating the Effect of α-Fe2O3 Oxides on the BaFe2O4 Pyrosynthesis
           Temperature - The Digital Processing of TG and DTA Curves

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      Abstract: Publication date: 7 September 2021
      Source: Advanced Engineering Forum Vol. 42
      Author(s): Iulian Ştefan, Gabriel Constantin Benga, Ionel Dănuț Savu, Sorin Vasile Savu, Bebe Adrian Olei
      In the research activities on the barium monoferrite pyrosynthesis, an important place is occupied by TG and DTA analysis. The effects of different hematite (α-Fe2O3) granulations on the BaFe2O4 pyrosynthesis temperature were followed. Four types of commercial hematite powders were used, the difference between them being the fineness of the powder granules and the purity. Only one type of commercial barium carbonate (BaCO3) powder was also used as a barium additive in the BaFe2O4 pyrosynthesis. Each of the 4 types of α-Fe2O3 with BaCO3 were subjected to the homogenization process in a planetary mill for a more intimate mixing of the powders in order to obtain error-free results regarding the pyrosynthesis reaction. To determine BaFe2O4 pyrosynthesis temperature, a derivatograph device was used. All the data obtained with this thermal device were digitally processed in order to extract the two TG and DTA curves. The protective atmosphere in the furnace was nitrogen. BaFe2O4 pyrosynthesis temperatures recorded different values for the four mixtures, depending on the particle size of the α-Fe2O3 powders, protective atmosphere from furnace and the mixing conditions. The effects of Fe2O3 oxides on the BaFe2O4 pyrosynthesis temperature is observed when are used very fine hematite powders in mixtures, obtaining a reduction of pyrosynthesis temperature up to 16% compared to the mixture where the size of the hematite is coarser.


      PubDate: Tue, 7 Sep 2021 00:00:00 +0200
       
  • Influence of the Polymer Addition in Quenching Water on the Deformation
           and Residual Stresses of Aluminum Alloy Sheets

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      Abstract: Publication date: 7 September 2021
      Source: Advanced Engineering Forum Vol. 42
      Author(s): Maria Stoicănescu, Gheorghe Popa, Marin Petre, Alexandra Valerica Achim
      The quenching is one of the most used mechanisms for increase the strength of aluminium alloys sheets. The purpose of quenching is to keep the super-saturated solid solution formed during the solution heat treatment as intact by rapid cooling. In order to establish the influence of the addition of polymer in the quenching water on the distortion and residual stresses of the aluminium alloy sheets, several tests were performed with different concentrations of the polymer in demineralized water. The experiments were performed on 6082 aluminium alloy sheets with a thickness of 5 mm. The quenching of the samples was done by immersion in a stainless steel vessel with a capacity of 10 liters. The obtained results show that the addition of polymer in demineralized water positively influences the deformation of aluminium alloy sheets. In this way, a correlation between the polymer concentration and the deformation of the plates was established. Regarding the internal stresses, no correlation was identified with the level of polymer used in demineralized water.


      PubDate: Tue, 7 Sep 2021 00:00:00 +0200
       
  • Study on the Effects of Heat Treatments on the Physical and Mechanical
           Characteristics of 1.4301 Stainless Steel

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      Abstract: Publication date: 7 September 2021
      Source: Advanced Engineering Forum Vol. 42
      Author(s): Maria Stoicănescu
      The 1.4301 stainless steel is part of the category of austenitic stainless steels, steels which do no undergo heat treatments in general, as they are intended for hot plastic deformation in particular. The aim of the research presented in this paper was to obtain significantly improved characteristics of the resistance properties in relation to the values obtained under classical conditions, by applying heat treatments. Samples taken from the delivery state material underwent annealing, quenching and ageing heat treatments. Subsequently, the samples thus treated were subjected to tests enabling the determination of the correlations between the heat treatment parameters, the structure and the properties.


      PubDate: Tue, 7 Sep 2021 00:00:00 +0200
       
  • Digital Technologies for Analysis of Restoration of Serial Numbers

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      Abstract: Publication date: 7 September 2021
      Source: Advanced Engineering Forum Vol. 42
      Author(s): Mihai Ursu, Gabriel Benga
      In daily activities, serial numbers represent one way to range finished products of different types of production fields and also tracking those objects during their lifetime – ever since their exit of the production site until their recycling. In this paper are presented several types of imprinting techniques as well as a case study for restoration of a modified serial number.


      PubDate: Tue, 7 Sep 2021 00:00:00 +0200
       
  • Analysis on the Dynamic Performance of Vehicles

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      Abstract: Publication date: 7 September 2021
      Source: Advanced Engineering Forum Vol. 42
      Author(s): Oana Victoria Oțăt, Ilie Dumitru, Laurenţiu Racilă, Dragoș Tutunea, Lucian Matei
      The current accelerated developments within the automotive sector have triggered a series of performance, comfort, safety and design-related issues. Hence, oftentimes manufacturers are challenged to combine various elements so as to achieve an attractive design, without diminishing the vehicle’s dynamic performance. In order to determine the vehicle dynamic performances we carried out an analysis by two methods. In the first part of the paper, we have used the analytical method to establish the dynamic performances of a vehicle. The second part of our study addresses another method to determine the star performances of the vehicle by means of computerized simulations. The first test aimed to determine vehicle starting performances for two vehicle models, with similar technical configuration, but with the same initial data. In the second test, we aimed at determining the start performance for the same car model, with the same initial data, but for different adhesion coefficients


      PubDate: Tue, 7 Sep 2021 00:00:00 +0200
       
  • Experimental Stand to Investigate the Injection Process in Diesel Engines

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      Abstract: Publication date: 7 September 2021
      Source: Advanced Engineering Forum Vol. 42
      Author(s): Dragoș Tutunea, Ilie Dumitru, Laurenţiu Racilă
      The objective of this paper is to investigate the fuel injection system in diesel engines by using inline pumps. In a diesel engines, the fuel injection pressure plays an important role in the combustion process in order to obtain high performance and low fuel consumption. The experiments in this paper are been performed on a 6 cylinder inline pump which is actioned by an electric motor with variable r.p.m.-s The quantity of the fuel injected by each injector is measured function of time and the speed of electric motor. The experiments show the degree of non-uniformity of the fuel delivered by the pump to injectors.


      PubDate: Tue, 7 Sep 2021 00:00:00 +0200
       
  • Microwave Technology for Hybrid Fabrication Processes

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      Abstract: Publication date: 7 September 2021
      Source: Advanced Engineering Forum Vol. 42
      Author(s): Daniel Cristian Ghelsingher, Ionel Dănuț Savu, Sorin Vasile Savu
      This paper aims to present how the microwave technology can be used in the development of hybrid joining and microjoining technologies for composites materials in order to increase productivity and quality of the welds. The paper is mainly focused on conceptualization of various types of hybrid processes by coupling a microwave beam with conventional thermal source such as arc welding, laser welding, 3D printing and others. The concepts presented in this paper will be completed with sensing solution for sensing and automation of the processes.


      PubDate: Tue, 7 Sep 2021 00:00:00 +0200
       
  • Comparative Analysis for the Anti-Vibration Isolation of a Foundation in
           the Case of an Elevating Mechanism

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      Abstract: Publication date: 7 September 2021
      Source: Advanced Engineering Forum Vol. 42
      Author(s): Carmen Elisabeta Radu, Edward Rășchitor, Iosif Tempea
      To study the vibrations of a Multiparker lift lift model, use various models for the lifting mechanism. In order to increase the number of parking spaces in the center of the Romanian capital, it is intended to design a parking lot on several levels above the Dâmbovița river, which would include two elevators for lifting and lowering cars. One of the elevators works as a system of translating cam and roller translating follower and thus, due to transmitting the torque from the electric drive motor to the cam, respectively changing the travel direction at the end of the route, upon starting and stopping, vibrations may occur within the elevator. This system must be supported on a foundation in order to achieve anti-vibration isolation. There are several possibilities to achieve this anti-vibration isolation, among which one can mention the elastic suspensions mounted on springs, rubber mats or standardized elastic rubber elements


      PubDate: Tue, 7 Sep 2021 00:00:00 +0200
       
  • Calculation of the Collapsing Critical Load of a Translating Cam Mechanism
           and Roller Translating Follower Actuating an Elevator

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      Abstract: Publication date: 7 September 2021
      Source: Advanced Engineering Forum Vol. 42
      Author(s): Carmen Elisabeta Radu, Edward Rășchitor, Iosif Tempea
      The above-ground parking lot above Dâmbovița river has stemmed from the need to cover the lack of parking lots in Bucharest. The parking lot may be serviced, in case of emergency, by auxiliary elevators that are operated by mechanisms provided with translating cams and roller translating followers. In this paper, a calculation of the collapsing critical load shall be performed. One shall also analyze here the rod model and the model with several rods of the mechanism provided with a translating cam and roller translating follower. In order for the rods to resist collapsing, one must be found in the elastic field, thus verifying Euler’s formula.


      PubDate: Tue, 7 Sep 2021 00:00:00 +0200
       
  • Portable Abdominal Insufflation Device for Stopping Uncontrolled Abdominal
           Bleeding in Trauma Cases

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      Abstract: Publication date: 7 September 2021
      Source: Advanced Engineering Forum Vol. 42
      Author(s): Daniela Coman, Lucian Gheorghe Gruionu
      Needle insertion in biological tissue has attracted considerable attention due to its application in minimally invasive procedures such as laparoscopy or transcutaneous biopsy. In this paper the force of the Veress needle insertion into the abdominal wall and the von Mises stress were studied, demonstrating the ability of finite element models to provide additional understanding of the processes taking place. Veress needle insertion force may cause complications during surgery, the most common being vascular lesions, thus affecting the precision and duration of surgery assisted by a portable abdominal insufflation device. This study was the first step in developing a force feedback for needle insertion into the abdominal wall assisted by a portable abdominal insufflation device. The CAD model of the prototype of a portable abdominal insufflation device was made. Then the prototype of a portable abdominal insufflation device was developed. For testing purposes an artificial silicone model was made. The paper also includes the experimental results obtained by measuring the maximum pressure inside the artificial silicone model after the penetration of the wall.


      PubDate: Tue, 7 Sep 2021 00:00:00 +0200
       
  • Development of the Car Seat through a Wider Range of Active Elements
           Implementation

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      Abstract: Publication date: 7 September 2021
      Source: Advanced Engineering Forum Vol. 42
      Author(s): Anca Giorgiana Barbu, Marian Gheorghe
      Car seats represent a constructive - functional system including a variety of elements, assembled on a specific frame, among those the main components are the seat pan, the seat backrest, and the seat headrest. In order to improve the comfort of the driver and passengers, as well vehicle general safety, the car seats are under of intensive research and implementation of advanced developments.Thus, through of variety of sensors integrated into the seat, some important parameters are analysed for keeping the drivers alert and comfortable while driving semi-autonomous or autonomous cars. For adjustment of the seat linear and angular positions, a special system has been implemented, comprising electric, electronic, and pneumatic elements. Also, seat micro-adjustments are possible through the action of specific actuators. The car seat design and manufacture take into consideration a diverse array of data, based on a large range of parameters to face the diversity of drivers requirements. The present paper is advancing a conceptual development of car complex seat, integrating a number of active elements, with multiple possible adjustments. The new seat model is designed to satisfy a larger diversity of people both in terms of comfort and safety.


      PubDate: Tue, 7 Sep 2021 00:00:00 +0200
       
  • Human Upper Limb Experimental Analysis for Assistive Devices in Feeding
           Process

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      Abstract: Publication date: 7 September 2021
      Source: Advanced Engineering Forum Vol. 42
      Author(s): Cristian Copilusi, Ionut Geonea, Alexandru Margine, Adrian Rosca
      This research addresses attention to human upper limb experimental analysis during feeding process aiding disabled persons. The research core is focused on the experimental process of obtaining the angular amplitudes and trajectories developed by the human upper arm during feeding process. The research originality consists on the obtained results which can be used in further researches for command and control of robotic assisting devices.


      PubDate: Tue, 7 Sep 2021 00:00:00 +0200
       
  • Research Regarding the Effects of 120 mm HE Mortar Bombs on Advanced
           Materials

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      Abstract: Publication date: 7 September 2021
      Source: Advanced Engineering Forum Vol. 42
      Author(s): Daniela Pintilie, Iuliana Florina Pană, Adrian Malciu, Constantin Puică, Cristina Pupăză
      High Explosive Mortar bombs are used on the battlefield for destroying the manpower, non-armoured equipment and shelters. The paper describes an original experimental and numerical approach regarding the potential threats caused by the detonation of 120 mm HE mortar bombs. The evaluation of the bomb effect presumes the fulfillment of experimental trials that focus on two physical mechanisms which appear after the detonation of the cased high explosive. These mechanisms are the shock wave generation and the fragments propulsion, which were also studied by a numerical model that provides results over the bomb fragmentation mode. The novelty of the paper consists in the calibrated 3D numerical model confirmed by the experimental data, which provides information over the fragmentation process of the case and the initial velocity of its fragments, proving that the main threat of this type of ammunition is the effect through metal fragments. The results of numerical simulation and experimental data are used for their comparative analysis and the assessment of the phenomena.


      PubDate: Tue, 7 Sep 2021 00:00:00 +0200
       
  • Characteristics of Wastewater from Different Pretreatments of Flax/Cotton
           Fabrics

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      Abstract: Publication date: 7 September 2021
      Source: Advanced Engineering Forum Vol. 42
      Author(s): Mihaela Dochia, Simona Gavrilaş
      To be properly used in the textile industry, the natural materials are subject to different pretreatments. During the scouring, the non-cellulosic attendants (wax, pectin, pigments) are removed. The enzymes have proved their efficiency in this regard but also in terms of being friendly with the environment. The textile industry is a water large consumer, comprising many wet processes: bioscouring, bleaching, mercerizing, and dyeing. The water quantity needed for each step is very high. The resulted wastewater comprises different types of chemicals, most of them non-biodegradable: acids, sodium hydroxide, hypochlorites, peroxides, etc. The actual trends and legislation require the change of classical methods used with ecological ones. One particular reason for this tendency is also related to the economic issue, the use of eco-friendly treatments leading to significant economical savings. The present study was focused on enzymatic treatments with the use of two chelating agents (sodium citrate and EDTA) to remove the flax/cotton fabric impurities. The new proposed scouring treatment, with sodium citrate as a chelating agent, presents less aggressivity to the environment compared with the classical one. The temperature used was lower (55 °C), the pH close to the neutral point, and biodegradable chemicals were used. The chosen technology included a series of independent steps which they assumed: washing of flax/cotton fabric at 100 °C for dust and physically linked impurities removing, dried at room temperature, and conditioning at 105 °C in the oven for 2h. Afterward, the samples were immersed in the reaction bath which contained a mixture of pectinolytic products, the chelating agents (sodium citrate or EDTA), and the surfactant. The hydrolytic reaction was optimised following the influence of a pair of parameters: enzyme concentration/exposure time. Water samples from each reaction bath were collected and different physicochemical parameters were analysed: pH, salinity, TDS, conductivity, DO, CCOMn, turbidity and dry residue. The results obtained were following the legislation. In the case of the classical treatment, the data was up to 100 % higher compared with the new proposed treatment were complexing agent sodium citrate was used. Analysing from different points of view the results obtained, we can say that the considered treatment could be a promising alternative to the current one. It might contribute to less wastewater pollution and technological economical improvement.


      PubDate: Tue, 7 Sep 2021 00:00:00 +0200
       
  • Sustainable Remediation of Soils Contaminated with Petroleum Products

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      Abstract: Publication date: 7 September 2021
      Source: Advanced Engineering Forum Vol. 42
      Author(s): Madalina Albu
      In nature, it acts, simultaneously or successively, synergistically or antagonistically, on small or larger spaces, for a long or very short time, numerous natural or artificial processes that pollute, leading to the alteration of the quality of the environment. The basic activity carried out within the oil scaffolding consists in the extraction of crude oil and gases from the deposits in their exploitation, their collection, separation of phases (crude oil, reservoir water, gas), crude oil treatment, storage and sending to users. Contamination of the field related to drilling-extraction wells with crude oil, heavy petroleum products, salt water, various chemicals, etc. has a random character, but with undesirable implications on soil, surface water and / or groundwater, depending on the nature of the pollutant, its quantity and area of spread Pollution sources in the oil industry, both systematic and accidental, have a greater or lesser spread, depending on the size of the field, the type and composition of the extracted fluids, the extraction technology used, the age of oil exploitation in the area, relief and hydrographic network. Having available the data provided by the pollution diagnosis, it is possible to assess the risk that the investigated pollution represents for the people on the site and for the natural environment. If it turns out that the risk is significant, then the decision is made to switch to depollution works. The choice of an appropriate depollution path is made on the basis of relevant technical and economic criteria, which is a feasibility study. The proposed depollution technology must be the most appropriate for the case at hand and, at the same time, be available on the technology market. The most important part of the paper is dedicated to presenting the results of an experimental study on the depollution of soils contaminated with liquid petroleum products by sparging technologies, in order to ensure a sustainable remedy. The results of the soil analysis used in the experimental determination are presented, as well as the physic - chemical characteristics of the main soil pollutants. In the experimental part, laboratory decontamination of systems consisting of polluted soils was performed at the laboratory level, using air as a depollution agent. The processing of the data obtained from the experimental determinations allowed obtaining qualitative and quantitative information related to the decontamination speed depending on the nature of the soil, the nature and concentration of the pollutant and the temperature of the decontamination air. Estimating the cost places this technology at a low level compared to thermal technologies and slightly higher than microbiological technologies.


      PubDate: Tue, 7 Sep 2021 00:00:00 +0200
       
  • Aspects Regarding Polluting Emissions to the Stack of Clincher Ovens in
           Romanian Cement Factories

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      Abstract: Publication date: 7 September 2021
      Source: Advanced Engineering Forum Vol. 42
      Author(s): Cristian Ciobanu, Gheorghe Voicu, Irina Aura Istrate, Paula Tudor
      The paper presents an analysis of the flow of flue gases and dust in the area of the clinker kiln and in the area of the flour mill, as well as emission data for the last three consecutive years at the flour mill stack - clinker kiln, from some cement factories in Romania. In general, both emissions of dust (total powders) and pollutant gases (SOx, NOx, CO, dioxins and furans, VOC, heavy metals, etc.) were within the permissible limits set out in the Integrated Environmental Permit of the individual plants.


      PubDate: Tue, 7 Sep 2021 00:00:00 +0200
       
  • The Role of Innovative Projects for Sustainable Development of Enterprises

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      Abstract: Publication date: 7 September 2021
      Source: Advanced Engineering Forum Vol. 42
      Author(s): Andreea Maria G. Militaru, Bogdan Fleacă, Cristina Simion, Mirona Popescu
      Today, sustainability is identified more than just an environmental issue, being part of the enterprise strategies for a connected and efficient structure. More and more enterprises become aware of the challenges of sustainability in society. The purpose of this paper is to determine and discuss the role of projects for the sustainable development of enterprises by researching the existing literature. This paper focuses on what means sustainable development within the enterprises, the main characteristics and examples of innovative projects leading towards sustainable development inside/outside the enterprise.


      PubDate: Tue, 7 Sep 2021 00:00:00 +0200
       
  • Considerations Regarding Pollution Caused by Ships in the Romanian Danube
           Sector

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      Abstract: Publication date: 7 September 2021
      Source: Advanced Engineering Forum Vol. 42
      Author(s): Ionel Baloșin, Constantin Florescu, Ion Mirel
      In this paper we present the current situation related to the legislative framework on the definition of generated waste by ships in the field of maritime navigation and inland waterway navigation, their management on board ships, handover to port facilities and results in the development of proposals to support participants in the shipping activity in the field of pollution prevention of the Romanian Danube sector. The purpose of the paper is to contribute to the improvement of the current measures that are applied in the field of prevention of pollution of the Romanian Danube sector by ships.


      PubDate: Tue, 7 Sep 2021 00:00:00 +0200
       
  • A New Educational Requirement: Forming Specialists in the Field of Green
           Procurement

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      Abstract: Publication date: 7 September 2021
      Source: Advanced Engineering Forum Vol. 42
      Author(s): Olimpia Ghermec, Christian Ghermec, Ionela Gabriela Bucşe
      The social responsibility of companies has an increasingly important role in their relationship with the environment, regardless of the object of activity. Green procurement plays an important role in achieving these objectives. Department of Engineering and Management of Technological Systems Drobeta Turnu - Severin organizes or participates periodically in meetings with employers or collaborators, in order to identify new educational requirements regarding the competencies and abilities of graduates. It was thus found that qualified personnel are needed in making green procurement. In order to meet this requirement, our department aims to form specialists in the field of green procurement. The introduction of the new syllabus in the master's degree programs requires the completion of research steps to strengthen the curriculum by diversifying professional and transversal skills, in accordance with the generic skills of the study program.


      PubDate: Tue, 7 Sep 2021 00:00:00 +0200
       
  • Sustainable Development and Liveability Concepts

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      Abstract: Publication date: 7 September 2021
      Source: Advanced Engineering Forum Vol. 42
      Author(s): Cristian Oliviu Burada, Andreea Gabriela Trif
      At its core, the concept of sustainable development refers to reconciling “development” and “environment” (McGranahan and Satterthwaite, 2003). Development, ie meeting people's needs, requires the use of resources and involves the generation of waste. The environment has finite resources, which impose limits on the ability of ecosystems to absorb or decompose waste or make it harmless on a local, regional and global scale. Basically, urban sustainability has been defined in various ways, with different criteria and emphasis, but its goal should be to promote and enable the long-term well-being of people and the planet, through the efficient use of natural resources and waste production in a region. of the city, simultaneously improving the capacity for life, through social facilities, economic opportunities and health, so that it can better fit into the capacities of local, regional and global ecosystems. In our study we critically observe strategies to analyze the buildings quality requirements and the links between environment, investments and buildings time frame. Methods dedicated to establishing procedures to evaluate the buildings evolution through time represent key features to maintaining good relations between elements and the environment.


      PubDate: Tue, 7 Sep 2021 00:00:00 +0200
       
  • Study Regarding Water Management in Mehedinţi County

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      Abstract: Publication date: 7 September 2021
      Source: Advanced Engineering Forum Vol. 42
      Author(s): Ionela Gabriela Bucşe, Mariana Ciobanu, Olimpia Ghermec
      There is a crucial need to achieve a more sustainable management of the world's water resources due to serious water scarcity and water pollution. A whole series of problems are related to these needs, but the problem of water resources is one of the most prominent. This paper aims to point out certain solutions to address these issues, such as providing a framework for the concept of integrated management of water resources in Mehedinţi County. Water quality protection should be a permanent concern; therefore, every member of society must bring out his own conscious and responsible contribution. To this end, by all means of information or education, it is necessary to debate the social, economic and ecological importance of problems and actions in order to prevent and combat pollution of water resources.


      PubDate: Tue, 7 Sep 2021 00:00:00 +0200
       
  • Mineral Water Quality Influencing Factors in their Selection for Use

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      Abstract: Publication date: 7 September 2021
      Source: Advanced Engineering Forum Vol. 42
      Author(s): Mihai Demian, Gabriela Demian
      The paper presents a way of selecting flat or carbonated mineral waters depending on the purpose for which it wishes to be used. A good mineral water must meet certain physical and chemical qualities at certain temperatures and have the appropriate pH to have the desired therapeutic effect. The analysis of the purpose for which the selection of mineral waters is desired results in the characteristics of the water to be analyzed, compared, and for which a weight of their influence in the decision-making is established. For selected waters, the characteristics receive scores that will in turn influence the selection of the recommended type of mineral water. The conclusions of the paper allow the establishment of a certain type of mineral water for the characteristics imposed by the desired purpose.


      PubDate: Tue, 7 Sep 2021 00:00:00 +0200
       
  • Aspects about the Environmental Quality Assessment in Urban Areas by
           Applying Multi-Criteria Analysis Methods

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      Abstract: Publication date: 7 September 2021
      Source: Advanced Engineering Forum Vol. 42
      Author(s): Luminița Grecu
      The aim of this paper is to make an assessment of the quality of the environment in urban areas based on multi-criteria analysis methods. Three important aspects of the quality of the environment in urban areas are considered in this paper, and an integrated AHP-SAW method is used to assess the quality of the environment. An indicator associated with the quality of the urban environment is proposed. This indicator is used to make a hierarcy of the environmental quality of an urban area over two periods of time. For the case study a city from the south - west region of Romania is chosen.


      PubDate: Tue, 7 Sep 2021 00:00:00 +0200
       
 
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