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  Subjects -> ENGINEERING (Total: 2699 journals)
    - CHEMICAL ENGINEERING (230 journals)
    - CIVIL ENGINEERING (240 journals)
    - ELECTRICAL ENGINEERING (145 journals)
    - ENGINEERING (1394 journals)
    - ENGINEERING MECHANICS AND MATERIALS (427 journals)
    - HYDRAULIC ENGINEERING (62 journals)
    - INDUSTRIAL ENGINEERING (92 journals)
    - MECHANICAL ENGINEERING (109 journals)

MECHANICAL ENGINEERING (109 journals)                     

Showing 1 - 109 of 109 Journals sorted alphabetically
Acta Mechanica     Hybrid Journal   (Followers: 24)
Acta Mechanica et Automatica     Open Access   (Followers: 1)
Acta Mechanica Solida Sinica     Full-text available via subscription   (Followers: 9)
Acta Universitatis Sapientiae Electrical and Mechanical Engineering     Open Access  
Advanced Energy Materials     Hybrid Journal   (Followers: 29)
Advances in Mechanical Engineering     Open Access   (Followers: 134)
Advances in Tribology     Open Access   (Followers: 15)
American Journal of Mechanical Engineering     Open Access   (Followers: 55)
Archive of Mechanical Engineering     Open Access   (Followers: 69)
Archives of Civil and Mechanical Engineering     Full-text available via subscription   (Followers: 4)
Australian Journal of Mechanical Engineering     Hybrid Journal   (Followers: 6)
Bulletin of NTU - Dynamics and strength of machines     Open Access   (Followers: 2)
Bulletin of the Polish Academy of Sciences : Technical Sciences     Open Access   (Followers: 1)
Case Studies in Mechanical Systems and Signal Processing     Open Access  
Chinese Journal of Mechanical Engineering     Open Access   (Followers: 4)
Curved and Layered Structures     Open Access   (Followers: 3)
Emission Control Science and Technology     Hybrid Journal   (Followers: 2)
European Mechanical Science     Open Access   (Followers: 1)
Facta Universitatis, Series : Mechanical Engineering     Open Access   (Followers: 6)
Friction     Open Access   (Followers: 6)
Frontiers in Mechanical Engineering     Open Access   (Followers: 7)
Frontiers of Mechanical Engineering     Hybrid Journal   (Followers: 8)
High Speed Machining     Open Access   (Followers: 5)
Human Factors and Mechanical Engineering for Defense and Safety     Hybrid Journal  
Ingeniería Mecánica     Open Access   (Followers: 4)
Ingenieria Mecánica. Tecnologia y Desarrollo     Open Access   (Followers: 3)
International Journal of Applied Mechanics and Engineering     Open Access   (Followers: 8)
International Journal of Civil, Mechanical and Energy Science     Open Access   (Followers: 3)
International Journal of Dynamics and Control     Hybrid Journal   (Followers: 7)
International Journal of Engineering Materials and Manufacture     Open Access   (Followers: 1)
International Journal of Manufacturing, Materials, and Mechanical Engineering     Full-text available via subscription   (Followers: 17)
International Journal of Mechanical and Materials Engineering     Open Access   (Followers: 11)
International Journal of Mechanical Engineering Education     Full-text available via subscription   (Followers: 13)
International Journal of Mechanical Sciences     Hybrid Journal   (Followers: 14)
International Journal of Mechatronics and Automation     Hybrid Journal   (Followers: 6)
International Journal of Metrology and Quality Engineering     Full-text available via subscription   (Followers: 4)
International Journal of Microwave Engineering and Technology     Full-text available via subscription   (Followers: 2)
International Journal of Powertrains     Hybrid Journal   (Followers: 2)
Iranian Journal of Science and Technology, Transactions of Mechanical Engineering     Hybrid Journal  
JMST Advances     Hybrid Journal  
Journal of Aircraft     Hybrid Journal   (Followers: 305)
Journal of Applied Mechanical Engineering     Open Access   (Followers: 10)
Journal of Applied Mechanical Engineering and Green Technology     Open Access   (Followers: 1)
Journal of Biomechanical Engineering     Full-text available via subscription   (Followers: 12)
Journal of Computational and Applied Research in Mechanical Engineering     Open Access  
Journal of Energy, Mechanical, Material and Manufacturing Engineering     Open Access   (Followers: 1)
Journal of Mechanical Design     Full-text available via subscription   (Followers: 82)
Journal of Mechanical Engineering     Open Access   (Followers: 69)
Journal of Mechanical Engineering and Automation     Open Access   (Followers: 12)
Journal of Mechanical Engineering Research     Open Access   (Followers: 14)
Journal of Mechanical Engineering Science and Technology     Open Access  
Journal of Mechanical Science and Technology     Hybrid Journal   (Followers: 7)
Journal of Mechanics     Hybrid Journal   (Followers: 21)
Journal of Mechatronics, Electrical Power, and Vehicular Technology     Open Access   (Followers: 6)
Journal of Microelectromechanical Systems     Hybrid Journal   (Followers: 38)
Journal of Non-Equilibrium Thermodynamics     Hybrid Journal   (Followers: 7)
Journal of Statistical Mechanics: Theory and Experiment     Full-text available via subscription   (Followers: 4)
Journal of Strain Analysis for Engineering Design     Hybrid Journal   (Followers: 7)
Journal of the Brazilian Society of Mechanical Sciences     Open Access   (Followers: 2)
Journal of the Brazilian Society of Mechanical Sciences and Engineering     Hybrid Journal   (Followers: 3)
Journal of the Mechanical Behavior of Biomedical Materials     Hybrid Journal   (Followers: 13)
Journal of Theoretical and Applied Mechanics     Open Access   (Followers: 26)
Jurnal Energi Dan Manufaktur     Open Access  
Jurnal Taman Vokasi     Open Access  
Jurnal Teknik Mesin     Open Access  
Latin American Journal of Solids and Structures     Open Access   (Followers: 4)
Lubricants     Open Access   (Followers: 2)
Main Group Metal Chemistry     Open Access   (Followers: 2)
Material Design & Processing Communications     Hybrid Journal  
Mechanical Engineering and Design     Open Access   (Followers: 75)
Mechanical Engineering Research     Open Access   (Followers: 20)
Mechanical Sciences     Open Access   (Followers: 11)
Mechanical Systems and Signal Processing     Hybrid Journal   (Followers: 7)
Modern Mechanical Engineering     Open Access   (Followers: 58)
MTZextra     Full-text available via subscription  
Open Mechanical Engineering Journal     Open Access   (Followers: 2)
Periodica Polytechnica Mechanical Engineering     Open Access  
Proceedings of the Institution of Mechanical Engineers Part A: Journal of Power and Energy     Hybrid Journal   (Followers: 8)
Proceedings of the Institution of Mechanical Engineers Part B: Journal of Engineering Manufacture     Hybrid Journal   (Followers: 16)
Proceedings of the Institution of Mechanical Engineers Part C: Journal of Mechanical Engineering Science     Hybrid Journal   (Followers: 27)
Proceedings of the Institution of Mechanical Engineers Part D: Journal of Automobile Engineering     Hybrid Journal   (Followers: 16)
Proceedings of the Institution of Mechanical Engineers Part E: Journal of Process Mechanical Engineering     Hybrid Journal   (Followers: 3)
Proceedings of the Institution of Mechanical Engineers Part F: Journal of Rail and Rapid Transit     Hybrid Journal   (Followers: 15)
Proceedings of the Institution of Mechanical Engineers Part G: Journal of Aerospace Engineering     Hybrid Journal   (Followers: 44)
Proceedings of the Institution of Mechanical Engineers Part H: Journal of Engineering in Medicine     Hybrid Journal   (Followers: 3)
Proceedings of the Institution of Mechanical Engineers Part I: Journal of Systems and Control Engineering     Hybrid Journal   (Followers: 15)
Proceedings of the Institution of Mechanical Engineers Part J: Journal of Engineering Tribology     Hybrid Journal   (Followers: 37)
Proceedings of the Institution of Mechanical Engineers Part K: Journal of Multi-body Dynamics     Hybrid Journal   (Followers: 4)
Proceedings of the Institution of Mechanical Engineers Part L: Journal of Materials: Design and Applications     Hybrid Journal   (Followers: 12)
Proceedings of the Institution of Mechanical Engineers Part M: Journal of Engineering for the Maritime Environment     Hybrid Journal   (Followers: 6)
Proceedings of the Institution of Mechanical Engineers Part N: Journal of Nanoengineering and Nanosystems     Hybrid Journal   (Followers: 3)
Proceedings of the Institution of Mechanical Engineers Part O: Journal of Risk and Reliability     Hybrid Journal   (Followers: 6)
Proceedings of the Institution of Mechanical Engineers Part P: Journal of Sports Engineering and Technology     Hybrid Journal   (Followers: 4)
Quantitative InfraRed Thermography Journal     Hybrid Journal   (Followers: 1)
Recent Patents on Mechanical Engineering     Hybrid Journal  
Rekayasa Mesin     Open Access  
Research Papers Faculty of Materials Science and Technology Slovak University of Technology     Open Access   (Followers: 3)
Science China Physics, Mechanics & Astronomy     Hybrid Journal   (Followers: 4)
Scientific Bulletin of Valahia University - Materials and Mechanics     Open Access  
Simetris : Jurnal Teknik Mesin, Elektro dan Ilmu Komputer     Open Access  
Strojarstvo     Full-text available via subscription  
Strojn?cky casopis ? Journal of Mechanical Engineering     Open Access   (Followers: 1)
Technical Reports Mechanical Engineering     Open Access   (Followers: 5)
Trends in Mechanical Engineering & Technology     Full-text available via subscription   (Followers: 3)
Tribologia : Finnish Journal of Tribology     Open Access   (Followers: 2)
Universal Journal of Mechanical Engineering     Open Access   (Followers: 19)
Vestnik of Don State Technical University     Open Access  
Двигуни внутрішнього згоряння     Open Access   (Followers: 1)
Проблемы машиностроения - Mechanical Problems     Open Access   (Followers: 1)

           

Similar Journals
Journal Cover
Proceedings of the Institution of Mechanical Engineers Part L: Journal of Materials: Design and Applications
Journal Prestige (SJR): 0.279
Citation Impact (citeScore): 1
Number of Followers: 12  
 
  Hybrid Journal Hybrid journal (It can contain Open Access articles)
ISSN (Print) 1464-4207 - ISSN (Online) 2041-3076
Published by Sage Publications Homepage  [1084 journals]
  • Semi-active vibration control of SiC-reinforced Al6082 metal matrix
           composite sandwich beam with magnetorheological fluid core
    • Authors: Vipin Allien J, Hemantha Kumar, Vijay Desai
      Abstract: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Ahead of Print.
      Dynamic characterization of silicon carbide particles reinforced Al6082 alloy metal matrix composite sandwich beam with magnetorheological fluid core is experimentally investigated. The study is focused on determining the effect of magnetorheological fluid core on the dynamic behavior of the sandwich structure. The magnetorheological fluid core is enclosed between the top and bottom metal matrix composite beams. The metal matrix composite beams are cast with silicon carbide particles in Al6082 alloy varying from 0 to 20 wt%. The magnetorheological fluid is prepared in-house and contains 30 vol.% carbonyl iron powder and 70 vol.% silicone oil. The free vibration test is conducted to determine the natural frequencies and damping ratio. It is found that the natural frequencies and damping ratio of the sandwich beams increased with an increase in the applied magnetic flux density. The experimental forced dynamic response of sandwich beams is carried out using sine sweep excitation. Vibration amplitude suppression capabilities of the sandwich beams subjected to varying magnetic flux densities are determined. The experimental forced vibration results reveal that metal matrix composite–magnetorheological fluid core sandwich beams have excellent vibration amplitude suppression capabilities.
      Citation: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications
      PubDate: 2019-11-28T05:30:52Z
      DOI: 10.1177/1464420719890374
       
  • Investigation on crushing behavior of laminated conical absorbers with
           different arrangements under axial loading
    • Authors: Ali Akhavan Attar, Mahdi Kazemi
      Abstract: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Ahead of Print.
      AbstractsIn this paper, the crushing properties of conical tubes made of stainless steel 430 have been investigated with different arrangements under quasi-static axial load both experimentally and numerically. For numerical investigation, nonlinear finite element method simulation is conducted using LS-Dyna software. In the experimental tests, the specimens with the height, major diameter, minor diameter and thickness of 150, 70, 50 and 1 mm are considered, respectively. Different combinations of layers are prepared using different cross-sections. A total of seven different arrangements have been designed in three distinct groups with constant mass and the crushing behavior has been extracted for them. To ensure the validity of the simulation results, several specimens which have the thickness of 1 mm have been tested experimentally. Comparing the results indicates the consistency of the experimental and numerical data. According to the obtained results, it is observed that with increasing the number of layers, the energy absorption capacity is increased; moreover, the peak load is increased by 75.2%. In fact, with increasing the number of layers, increasing trend is observed in peak load, and contrary to the initial expectations, this trend is not linear. It is also observed that by changing the layer arrangement and the layer number, the mean crushing force can increase approximately three times.
      Citation: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications
      PubDate: 2019-11-26T07:18:44Z
      DOI: 10.1177/1464420719888237
       
  • Bioinspired structures for core sandwich composites produced by fused
           deposition modelling
    • Authors: J Bru, M Leite, AR Ribeiro, L Reis, AM Deus, M Fátima Vaz
      Abstract: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Ahead of Print.
      Sandwich panels are widely used in many engineering applications where saving weight while maintaining high strength and stiffness is required. The most common core structure in sandwich panels is the two-dimensional regular hexagonal cell shape, denoted as Honeycomb. In recent times, bioinspired materials and structures have become increasingly attractive to researchers, as they provide adequate functional properties. The goal of the present work is to study two new bioinspired structures aimed at improving the performance of sandwich panel cores. Among all the large amount of structures that nature provides, two novel cores inspired in the structures of enamel and of bamboo were chosen. The compressive and flexural properties of these two innovative cellular structures were assessed and compared with the classic honeycomb. All the arrangements were numerically simulated for different relative densities. The fused deposition modelling technique enables to print selected samples in polylactic acid that were experimentally tested in compression and in bending. Results show that the mechanical properties depend strongly on the core geometry, on the relative density and on the cell thickness distribution. A satisfactory agreement was found between finite element results and experimental data. For the same relative density, the bioinspired natural structures proposed in the present study are potential competitors with the traditional core structures in what concerns strength, stiffness and energy absorption.
      Citation: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications
      PubDate: 2019-11-23T05:50:12Z
      DOI: 10.1177/1464420719886906
       
  • Significance of material constitutive model and forming parameters on the
           crashworthiness performance of capped cylindrical tubular structures
    • Authors: Praveen Kumar A, Afdhal Akbar, Annisa Jusuf, Leonardo Gunawan
      Abstract: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Ahead of Print.
      An accuracy of crushing performance indicators is critical to evaluate in finite element crushing simulations particularly for the press-formed capped tubular energy absorbing structures. It is essential to select the appropriate material constitutive model and to incorporate the forming parameters into the finite element crushing model as a vital input. Hence in the present article, the influence of various material constitutive models and forming (multi-stage deep drawing) parameters on the axial crashworthiness characteristics of thin-walled capped cylindrical tubes were investigated numerically. Both forming and crushing simulations were executed by nonlinear finite element LS-DYNA® code. The forming parameters such as thickness distribution, residual stress, and effective plastic strain were mapped to a finite element crushing model of the tube. The numerical predictions of the thickness distribution and final deformed profiles of the capped cylindrical tubes are correlated with the experiments. The results revealed that the forming parameters have a substantial effect on the crushing performance of the deep drawn capped cylindrical tubes. As a result of these analyses, the thickness and strain predictions strengthens the tube and significantly influenced the crushing performance indicators such as initial peak crushing force, mean crushing force, and the energy absorbing capacity.
      Citation: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications
      PubDate: 2019-11-19T12:17:44Z
      DOI: 10.1177/1464420719887408
       
  • Size-dependent natural frequencies of functionally graded plate with out
           of plane material inhomogeneity using Eringen’s theory of nonlocal
           elasticity
    • Authors: Piyush Pratap Singh, Mohammad Sikandar Azam, Vinayak Ranjan
      Abstract: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Ahead of Print.
      Nonlocal effect is one of the critical reasons which cause an extraordinary vibration response in small-scale structures. In the present work, vibration characteristics of functionally graded nonlocal plate are studied using Eringen’s nonlocal classical elasticity theory. A computationally efficient numerical method has been proposed in this study by reformulating the classical plate theory and Rayleigh–Ritz method using nonlocal differential relationship of Eringen’s theory in conjugation with algebraic polynomial displacement functions. The reformulated method helps to evaluate the natural frequencies of functionally graded nonlocal plates subjected to all possible combinations of edge conditions. The material properties are assumed to vary through the thickness of the plate following the power law. The computed results of natural frequencies are first tested for convergence and then validated with the published one. A parametric study has been thoroughly conducted focusing on the effects of aspect ratio, nonlocal parameter, material property index and Young’s modulus ratio on the natural frequency parameters of the functionally graded nonlocal plate. It has been observed that the material property index and aspect ratio affect the vibration behaviour of the functionally graded plate. The study also establishes that nonlocal effect has a pronounced influence on the higher modes of vibration of functionally graded plate. 3D mode shapes of functionally graded material nonlocal plate have also been reported.
      Citation: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications
      PubDate: 2019-11-19T08:58:34Z
      DOI: 10.1177/1464420719886887
       
  • Paris law relations for an epoxy-based adhesive
    • Authors: AVM Rocha, A Akhavan-Safar, R Carbas, EAS Marques, R Goyal, M El-Zein, LFM da Silva
      Abstract: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Ahead of Print.
      Depending on the expression used in Paris law relation, crack growth rate can be a function of loading conditions. However, for design purposes, it is costly and time consuming to obtain a complete map for fatigue crack growth behavior of adhesives. Accordingly, using a damage parameter where the Paris law constants are similar for different loading conditions is very helpful. In this paper, mode I crack growth (FCG) tests were performed at different loading conditions. Results show that performing one experiment would be enough to obtain Paris law constants if the effect of R ratio is considered in the relations.
      Citation: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications
      PubDate: 2019-11-13T09:31:51Z
      DOI: 10.1177/1464420719886469
       
  • Effect of nano-sized particles on grain structure and mechanical behavior
           of friction stir welded Al-nanocomposites
    • Authors: Tanvir Singh, SK Tiwari, DK Shukla
      Abstract: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Ahead of Print.
      Weldability of heat-treatable 6061-T6 aluminum alloy results in deterioration of mechanical properties due to dissolution of strengthening precipitates in the nugget zone of friction stir welded joints. These properties were improved by addition of reinforcement particles in the weld joint line. In the present work, attempts were made to produce 6061-T6 Al-based nanocomposites using the friction stir welding process by incorporating titanium oxide nanoparticles into the aluminum matrix for microstructure refining of the nugget zone and prevent the grain growth in the heat-affected zone. The effect of addition of nanoparticles on the evolution of grains structure and mechanical behavior of friction stir welded samples based on different combinations of rotational and travel speed was studied and discussed. Results revealed that the unreinforced samples were successfully welded at both low and high heat inputs, whereas the reinforced samples are not feasible at tool rotational speed (ω)  70 mm/min, respectively. The significant refining of grains in the nugget zone is possible with addition of nanoparticles via the Zener-pinning effect. A more pronounced increment in tensile strength, microhardness, and wear properties was observed compared to sample without nanoparticles under the same processing parameters due to embedment of nano-sized particles in the weld nugget zone.
      Citation: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications
      PubDate: 2019-11-05T06:58:35Z
      DOI: 10.1177/1464420719885156
       
  • Analysis of thick-walled spherical shells subjected to external pressure:
           Elastoplastic and residual stress analysis
    • Authors: Mohsen Kholdi, Abbas Loghman, Hossein Ashrafi, Mohammad Arefi
      Abstract: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Ahead of Print.
      When cylindrical and spherical vessels are subjected to the internal pressure, tensile tangential stresses are created throughout the thickness, the maximum of which are located at the inner surface of the vessels. To improve the performance of these vessels, autofrettage process has been devised to produce beneficial compressive residual stresses at the inner part of such vessels. The question arises whether the process such as autofrettage can be useful for vessels such as submarines or other thick walled tanks, which are used in deep sea waters and, therefore, subjected to high external hydrostatic pressure causing both radial and tangential stresses to be compressive across the thickness. On the other hand, is the residual stresses created by unloading from an external pressure beyond elastic limit beneficial and enhance their performances' In this study, elastoplastic and residual stresses in a thick-walled spherical vessel under external hydrostatic pressure has been investigated. The material behavior is considered to be elastic-perfectly plastic. Von Misses yield criterion is used to obtain initial yield point and for the ideal elastoplastic regime analytical relations are presented. It has been found that by applying external hydrostatic pressure yielding process will start from inside of the sphere. Finally after unloading, residual tensile stresses are created at the inner part of the vessel which is useful for the vessel. The residual stresses and the condition of reverse yielding is studied in this paper.
      Citation: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications
      PubDate: 2019-10-22T06:00:21Z
      DOI: 10.1177/1464420719882958
       
  • Medical devices biomaterials – A review
    • Authors: AJ Festas, A Ramos, JP Davim
      Abstract: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Ahead of Print.
      Due to the increase in the life expectancy of world’s population, health care demands in terms of quality and accessibility are higher than ever before. Concerning the manufacturing of medical devices, the development of new biomaterials, new manufacturing methods and techniques have always been on researchers focus. In the development of a medical device, the choice of the proper material to be used is of the most importance, since its ability and capacity to fulfil the expected function will determine the success of the medical device itself. This work aims to do a review of those that are the most commonly used biomaterials. After an explanation on what are biomaterials and what defines them, a more in-depth approach is presented to each of the four major types of biomaterials: metal, polymer, ceramic, and composites, where their main characteristics and preferred applications in the area of medical devices are described.
      Citation: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications
      PubDate: 2019-10-21T05:23:23Z
      DOI: 10.1177/1464420719882458
       
  • Characterization and application of a selective coating for solar
           collectors from of the cashew nut shell liquid
    • Authors: Diego Caitano Pinho, Francisco Nivaldo Aguiar Freire, Felipe Alves Albuquerque Araújo, Kaio Hemerson Dutra, Edwalder Silva Teixeira, Maria Eugênia Vieira da Silva, Paulo Alexandre Costa Rocha
      Abstract: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Ahead of Print.
      Solar energy is the most promising energy source, due to its great availability and applicability in thermal energy applications. However, researchers still experience technological and economical challenge, since many systems that use this energy still have low efficiency and high cost. In this way, the development of new materials and technologies to increase the efficiency of solar thermal collectors is both a challenge and a necessity. In this context, the objective of this work is to obtain and analyze selective surfaces for solar thermal collectors, using cashew nut shell liquid. The cashew nut shell liquid can be classified as technical or natural, depending on the mode of extraction of cashew liquid. An experimental bench was built to simulate a flat plate solar collector under real operating conditions. For comparative purposes, the tests were performed between the cashew nut shell liquid and the commercial surface (MRTiNOX). In order to verify the structure morphology and the chemical composition of the surface, analyzes were performed by scanning electron microscopy. In order to identify the presence of components after the sintering process, the infrared analysis technique was used. To analyze the surface absorbance, the ultraviolet–visible spectroscopy absorbance technique was used. With the tests in real conditions, it was possible to perform the temperature measurements, and later, with the energy balance, the absorptivity, emissivity, and efficiency were calculated. The technical cashew nut shell liquid presented efficiency of 42.86%, while the MRTiNOX, 41.8%. In contrast, natural cashew nut shell liquid obtained efficiency of 31.28%. Thus, the use of technical cashew nut shell liquid, a low-cost regional product, was presented as a viable and satisfactory solution for cost reduction in solar thermal collectors.
      Citation: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications
      PubDate: 2019-10-17T06:58:01Z
      DOI: 10.1177/1464420719880935
       
  • Mechanical degradation model of porous magnesium scaffolds under dynamic
           immersion
    • Authors: Hasan Basri, Akbar Teguh Prakoso, Mohd Ayub Sulong, Amir Putra Md Saad, Muhammad Hanif Ramlee, Dian Agustin Wahjuningrum, Susan Sipaun, Andreas Öchsner, Ardiyansyah Syahrom
      Abstract: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Ahead of Print.
      A new generation of bone scaffolds incorporates features like biodegradability and biocompatibility. A combination of these attributes will result in having a temporary bone scaffold for tissue regeneration that mimics the natural cancellous bone. Under normal conditions, scaffolds will be gradually eroded. This surface erosion occurs due to the immersion and the movement of bone marrow. Surface erosion on bone scaffolds leads to changes of the morphology. The mechanical response of the scaffolds due to the surface erosion is not fully understood. The aim of this study is to assess the influence of the dynamic immersion condition on the degradation behaviour and mechanical properties of porous magnesium. In the present work, load-bearing biomaterial scaffolds made of pure magnesium are immersed in simulated body fluids (SBF) with a certain flow rate. Samples with different porosities are subjected to tomography and are used to develop virtual 3D models. By means of numerical simulations, the mechanical properties, for instance, elastic modulus, plateau stress, 0.2% offset yield stress and energy absorption of these degraded samples are collected. The findings are then validated with the values obtained from the experimental tests. Finite element method enables the study on the failure mechanism within the biomaterial scaffolds. The knowledge of how weak walls or thin struts collapsed under compressive loading is essential for future biomaterial scaffolds development. Results from the experimental tests are found in sound good agreement with the numerical simulations.
      Citation: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications
      PubDate: 2019-10-17T06:58:01Z
      DOI: 10.1177/1464420719881736
       
  • Evaluation of different strain-based damage criteria for predicting the
           fatigue life of friction stir spot-welded joints under multi-axial loading
           conditions
    • Authors: Mahya Aghabeigi, Soran Hassanifard, Seyed M Hashemi
      Abstract: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Ahead of Print.
      In this article, fatigue life of dissimilar friction stir spot welds in Cross-Tension and Lap-Shear specimens is predicted using a number of fatigue damage criteria. The results revealed a relatively good correlation between predicted fatigue crack initiation lives and experimental data. Also, it has been shown that in the whole range of applied load levels, the least discrepancy between predicted fatigue lives and experimental data is related to the Smith–Watson–Topper criterion. Finally, an excellent agreement was found in predicting the location of the crack tips using the Fatemi–Socie criterion in both types of specimens.
      Citation: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications
      PubDate: 2019-10-12T05:54:14Z
      DOI: 10.1177/1464420719881480
       
  • Investigation on the effective parameters of through-the-width crack
           propagation in ceramic coatings due to substrate tension using discrete
           element method
    • Authors: MA Ghasemi, SR Falahatgar
      Abstract: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Ahead of Print.
      This paper aims to simulate surface cracking and interfacial delamination in ceramic coatings due to their application in different industries. For this purpose, one of the most widely used ceramics, yttrium-stabilized zirconia, which is used as a thermal insulator for superalloy substrate is considered as a case study. Discrete element method was used, due to its great ability to capture the damages at the microscale, to investigate the effect of crack spacing and coating thickness on crack initiation and propagation. Discrete element method solver code is provided by the authors. To investigate damages, a unit cell of the structure between two successive surface cracks was considered. The length of the unit cell represents the crack density in the structure. In addition, for each unit cell length, three coating thicknesses were considered. The results of the current study were compared and validated with those experiments and numerical simulation results presented in the open literature. Good agreement was found. Finally, the effect of interface roughness on stress distribution and damage initiation was examined.
      Citation: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications
      PubDate: 2019-10-02T05:17:23Z
      DOI: 10.1177/1464420719876314
       
  • Influence of multiple laser impacts on thin leading edges of turbine blade
    • Authors: M Ayeb, M Frija, R Fathallah
      Abstract: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Ahead of Print.
      Laser shock peening is a mechanical surface improvement treatment used to enhance the fatigue life of critical components. This paper investigates the influence of multiple square laser impacts to study their special effect on the diverse mechanical behaviours of the thin leading edge surface of turbine blades. Most works existing in the literature have presented experimental investigations. The originality of our paper is to validate and numerically simulate the proposed model. Indeed, a 3D finite element method of a thin leading edge specimen, Ti–6Al–4V, of a turbine blade is numerically simulated using the ABAQUS software. The mechanical surface modifications (residual stresses, equivalent plastic strains and Johnson–Cook superficial damage) induced by the multiple square laser impact are examined in detail. The main purpose of this investigation is to determine the effects of single-sided and double-sided laser shock peening.
      Citation: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications
      PubDate: 2019-09-26T05:45:11Z
      DOI: 10.1177/1464420719873936
       
  • Transient dynamic finite element simulation for prediction of surface
           integrity induced by waterjet peening
    • Authors: Rihem Amri, Adnen Laamouri, Sondes Manchoul, Raouf Fathallah
      Abstract: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Ahead of Print.
      This paper aims to develop and validate the transient dynamic finite element three-dimensional simulation of a waterjet peening process to predict surface properties (residual stresses, plastic strains, surface roughness, and superficial damage). The finite-element model considers an impingement of multisets of droplets, which strike the treated surface by impact pressures over the corresponding contact regions at high velocities. The impact pressures and their durations are modelled by using the liquid impact theory combined with an impact velocity law depending on the main parameters of the process. The behavior law of the material is an elastoviscoplastic law coupled to the Johnson–Cook damage criterion. The effectiveness of this simulation is discussed in two cases: (i) a linear mono-set of droplets and (ii) multisets of droplets using the experimental results of a waterjet-peened Al7075-T6 aluminum alloy. The predictive results of surface properties obtained by simulation with multi-sets of droplets appear more realistic than those obtained by simulation with a single set of droplets and more close to the experimental surface properties.
      Citation: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications
      PubDate: 2019-09-18T03:13:17Z
      DOI: 10.1177/1464420719874389
       
  • Mechanical joining of sheets to tubes by squeeze-grooving
    • Authors: LM Alves, RM Afonso, PAF Martins
      Abstract: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Ahead of Print.
      The purpose of this paper is to present a mechanical joining process to produce sheet-tube connections in a single stroke, at room temperature. The proposed solution is an enhancement of a previous joining by squeeze-grooving process that makes use of two independent mandrels and a customized spacer to control the inner joint radius and to improve its overall aesthetics. The presentation is illustrated with selected examples retrieved from experimentation and finite element modeling. Results show that the new proposed sheet-tube connections are characterized by a better redistribution of material within the joints and a very significant improvement of the pull-out strength. The proposed process also allows connecting a sheet to a tube close to the tube ends, which is impossible to achieve by means of the original joining by squeeze-grooving process.
      Citation: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications
      PubDate: 2019-09-18T03:13:17Z
      DOI: 10.1177/1464420719876965
       
  • Fatigue life evaluation of an ultrafine-grained pure aluminum
    • Authors: Alireza Babaei, Firooz Esmaeili-Goldarag, Hossein Jafarzadeh
      Abstract: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Ahead of Print.
      The aim of this study is an experimental and numerical investigation of the fatigue behavior of a notched ultrafine-grained pure aluminum processed by strip cyclic extrusion-compression method. In this regard, the fatigue experiments were conducted for the unprocessed and strip cyclic extrusion-compression processed specimens under various cyclic loads. In the numerical analyses, a dislocation dynamic constitutive material model which tracks the microstructure evolution was implemented for numerical estimation of the values of fatigue strength reduction factor via the volumetric approach. Considering the three-dimensional effect near the plate hole, the variation of the fatigue notch factor through the thickness of the plate was investigated and the obtained results showed that maximum fatigue strength reduction factor was occurred in the middle of the plate due to the symmetry of specimen geometry and loading condition. The investigation reveals a good agreement between the numerical and experimental lives. The results showed although the smooth processed specimens have higher fatigue strength in comparison of the unprocessed ones, the notched processed specimens have lower fatigue strength in comparison of the unprocessed ones.
      Citation: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications
      PubDate: 2019-09-17T04:50:48Z
      DOI: 10.1177/1464420719870558
       
  • A review on the properties of natural fibres and its bio-composites:
           Effect of alkali treatment
    • Authors: Parul Sahu, MK Gupta
      Abstract: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Ahead of Print.
      Due to the dominating advantages of natural fibres such as biodegradability, eco-friendliness, nominal cost, low density and high specific strength, they are being used opposite to synthetic fibres in many industrial applications. Despite many advantages, these fibres face some limitations such as higher moisture uptake, quality variations, low thermal stability, and poor compatibility with polymeric matrix. To overcome these limitations, chemical treatments of these fibres were found to be the most suitable method to improve adhesion with polymers, increase their strength and water absorption resistance, and improve their composite properties also. Among chemical treatments, alkali treatment is the most widely used and versatile surface modification method of the natural fibres. A good number of research works have been carried out on effect of alkali treatment on the properties of natural fibres and its composites, which motivated for this review. In this paper, the effect of alkali treatment on the properties of natural fibres has been reviewed. In addition, the physical and mechanical properties, thermal analysis and tribological behaviour of its biocomposites are also reviewed. It was concluded that alkali treatment of natural fibres could provide enhanced properties of various bio-composites up to a great extent.
      Citation: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications
      PubDate: 2019-09-13T01:18:46Z
      DOI: 10.1177/1464420719875163
       
  • Assessment of compacted-cementitious composites as porous restrictors for
           aerostatic bearings
    • Authors: Zélia Maria Velloso Missagia, Júlio Cesar dos Santos, Leandro José da Silva, Túlio Hallak Panzera, Juan Carlos Campos Rubio, Carlos Thomas
      Abstract: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Ahead of Print.
      Cementitious composites reinforced with silica, silicon carbide or carbon microfibres are designed, manufactured, characterised and tested as porous restrictor for aerostatic bearings. Carbon microfibres are residues obtained from the cutting process of carbon fibre-reinforced polymers. Porosity, permeability, flexural strength and stiffness are quite relevant in the design of aerostatic porous bearings. A 3141 full factorial design is carried out to identify the effects of particle inclusion and water-to-cement ratio(w/c) factors on the physical and mechanical properties of cementitious composites. Higher density material is achieved by adding silicon carbide. Higher porosity is obtained at 0.28 w/c level when silica and silicon carbide are used. Carbon microfibres are not effective under bending loads. Higher compressive strength is reached especially when silica particles are combined with 0.33 or 0.35 w/c. According to the permeability coefficient values the cementitious composites consisted of CMF (0.28 w/c), silica (0.30 w/c) or silicon carbide (0.30 w/c) inclusions are promising as porous restrictor; however, carbon microfibre porous bearings achieved the lowest air gap variation under the tested working conditions.
      Citation: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications
      PubDate: 2019-09-13T01:18:44Z
      DOI: 10.1177/1464420719874434
       
  • Prediction of fatigue damage accumulation of defective materials under
           variable amplitude loading
    • Authors: Maroua Saggar, Anouar Nasr, Haifa Sallem, Chokri Bouraoui
      Abstract: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Ahead of Print.
      The main goal of this attempt is to explore and analyze the behavior of a material containing artificial surface defect and solicited under variable amplitude cyclic loading. The observation and the follow-up of the loading history and the characterization of the damage accumulation were evaluated in the presence of an artificial surface defect. The results made it possible to highlight a strong nonlinearity of the damage accumulation. However, the absence of sequence effects encountered in a defect-free material has been found. In the perspective of developing an approach to evaluate the influence of the defects on cumulative damage under variable amplitude loading, this work consists of coupling a multiaxial fatigue criterion adapted to defective materials with a law of uniaxial damage solicited under variable amplitudes loading. A cumulative damage law has been used to analyze the validity of the proposed method. Introducing the equivalent multiaxial fatigue stress due to the presence of the defect allowed us to predict the residual lifetime of a defective material, and to find the effects of sequences usually observed for variable amplitude loading for the defect-free material. A coherent agreement is observed between the results predicted by the improved model and those obtained from the experimental investigations on specimens containing artificial surface defect subjected to purely alternating tension and torsion under increasing and decreasing load levels.
      Citation: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications
      PubDate: 2019-09-12T01:17:48Z
      DOI: 10.1177/1464420719874486
       
  • Experimental analysis of composite scarf adhesive joints modified with
           multiwalled carbon nanotubes under bending and thermomechanical impact
           loads
    • Authors: UA Khashaba, Ramzi Othman, IMR Najjar
      Abstract: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Ahead of Print.
      Scarf adhesive joints have attracted an increasing attention in joining/repairing of carbon fiber reinforced epoxy composite structures due to their zero eccentricity, which provides lower stress distribution across the adhesive layer and better aerodynamic surfaces compared to other bonded joints. The main objective of this study is to evaluate the performance of the scarf adhesive joints in carbon fiber reinforced epoxy composites under thermomechanical impact loads, which is very important for the aerospace and automotive industries. The adhesive was modified with optimum percentage of multiwalled carbon nanotubes. The impact tests were performed at 25 ℃, 50 ℃, and 75 ℃. The residual flexural properties of the unfailed impacted joints were measured using three-point bending test. Results from impact tests at 25 ℃, 50 ℃, and 75 ℃ showed improvement in the impact bending stiffness of the modified scarf adhesive joints by 8.3%, 7.4%, and 11.8% and maximum contact force by 15.6%, 21.3%, and 18.9%, respectively. The energy at failure of the modified scarf adhesive joints with multiwalled carbon nanotubes was improved by 15.2% and 16.4% respectively at 25 ℃ and 50 ℃. At test temperature of 75 ℃, the scarf adhesive joints have hysteresis load–displacement behavior and energy–time curve with rebound energy of 35% and absorbed (damage) energy of 65%. The residual flexural strength of the modified and unmodified scarf adhesive joints is 98.2% and 86.1% respectively, while their residual moduli have remarkable decrease to 71.7% and 81.3%.
      Citation: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications
      PubDate: 2019-08-31T11:21:45Z
      DOI: 10.1177/1464420719873122
       
  • Modified couple stress-based free vibration behavior of pre-twisted
           tapered BFGM rotating micro beam considering spin-softening and Coriolis
           effects
    • Authors: Sujash Bhattacharya, Debabrata Das
      Abstract: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Ahead of Print.
      An improved mathematical model of pre-twisted tapered rotating micro beams made of bidirectional functionally graded material (BFGM) is presented to study its free vibration behavior. The effects of spin-softening and Coriolis acceleration are incorporated, and modified couple stress theory is employed to address the size effect. The mathematical formulation is based on first-order shear deformation theory and is developed in a global non-inertial frame incorporating appropriate transformations between the global inertial frame and the local non-inertial frame. Two different but interrelated steps are employed, where the first step determines the centrifugally deformed configuration using minimum potential energy principle, and the second step determines the free vibration behavior through tangent stiffness of the deformed rotating beam using Hamilton's principle. The direct use of tangent stiffness considers the centrifugal stiffening effect through von Kármán non-linearity and bypasses the need of strain energy functional for the vibrating beam. The governing equations are transformed to an eigenvalue problem through state-space approach and solved following Ritz method. The effects of spin-softening, Coriolis acceleration, and pre-twist angle are shown and discussed. The effects of different parameters such as size-dependent parameter, aspect ratio, material gradation indices, operating temperature, FGM constituent, taperness parameters, and slender parameter are discussed.
      Citation: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications
      PubDate: 2019-08-31T11:21:44Z
      DOI: 10.1177/1464420719870822
       
  • Numerical study of mode I fracture toughness of carbon-fibre-reinforced
           plastic under an impact load
    • Authors: JJM Machado, PDP Nunes, EAS Marques, RDSG Campilho, Lucas FM da Silva
      Abstract: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Ahead of Print.
      The main objective of this work is, by using cohesive zone modelling, to compute the fracture toughness behaviour in mode I of unidirectional carbon-fibre-reinforced plastic subjected to an impact load at 4.7 m/s. To perform this task, double-cantilever beam specimens were simulated, with its opening displacement and crack propagation being assessed, as well as the evolution of strain rate through the test. Therefore, by plotting the crack propagation, it was possible to calculate the fracture toughness in mode I (GIC). A comparison of the numerical results with experimental tests previously performed by using a drop weight falling-wedge impact test equipment was made, allowing to infer that the numerical approach, based on a triangular cohesive zone modelling, is capable to predict the behaviour of such specimens under impact, accurately obtain GIC, and to determine the value of strain rate achieved through the test.
      Citation: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications
      PubDate: 2019-08-28T04:42:46Z
      DOI: 10.1177/1464420719871390
       
  • Finite element analysis of an elbow tube in concrete anchor used in water
           supply networks
    • Authors: Sorin Vlase, Daniel Scarlătescu, Marin Marin, Andreas Öchsner
      Abstract: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Ahead of Print.
      This paper aims to analyze the stress and strain states appearing in the elbow of a tube, such as those commonly used in a city’s water supply network. The stress field is characterized by the fact that there is a significant stress increase when compared to a straight tube. As a result, the strength of such an elbow must be investigated and guaranteed for such a network to be well designed. A practical solution used is to anchor the elbow in a massive concrete block. The paper compares the stress field that occurs in the elbow when it is free, buried in the ground, and when it is anchored in a massive concrete block. Furthermore, we investigate how a crack appears and propagates in the elbow. This happens especially for the elbow buried in the ground where the stress and strain are higher than when the elbow is anchored in concrete. The results obtained can be used in the current practice in the case of water supply networks made by high-density polyethylene pipes.
      Citation: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications
      PubDate: 2019-08-25T11:29:52Z
      DOI: 10.1177/1464420719871690
       
  • Modeling and optimization of multi-component materials selection and
           sizing problem
    • Authors: Fabio Giudice, Giovanna Fargione, Riccardo Caponetto, Guido La Rosa
      Abstract: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Ahead of Print.

      Citation: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications
      PubDate: 2019-02-08T04:44:46Z
      DOI: 10.1177/1464420719826172
       
  • Multiscale analysis of the low-velocity impact behavior of ceramic
           nanoparticle-reinforced metal matrix nanocomposite beams by micromechanics
           and finite element approaches
    • Authors: M Rasoolpoor, R Ansari, MK Hassanzadeh-Aghdam
      First page: 2419
      Abstract: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Ahead of Print.
      An efficient multiscale analysis is proposed to investigate the dynamic behavior of metal matrix nanocomposite beams reinforced by SiC nanoparticles under low-velocity impact loads. First, an analytical micromechanics model is developed to obtain the effective elastic properties of ceramic nanoparticle-reinforced metal matrix nanocomposite, and then the finite element method is used to predict the dynamic response of beams made of this nanocomposite material. Two important microstructural features, including size effect and agglomeration of nanoscale particles, are incorporated into the micromechanical analysis. The present simulation results for the elastic modulus and low-velocity impact response show good agreement with previously published results. The effects of volume percent, diameter and dispersion type of ceramic nanoparticles, geometrical features and boundary conditions of nanostructure, velocity and size of projectile on the contact force, and center deflection time histories of metal matrix nanocomposite beams are extensively examined. Analysis shows that homogenously distributed SiC nanoparticles into the metal matrix nanocomposites can obviously increase the nanostructure/projectile contact force and decrease both the beam center deflection and impact duration which is due to the enhancement of elastic properties. However, the ceramic nanoparticle agglomeration has an effect on the decrease of contact force and the increase of both the center deflection and impact duration. Also, it is concluded that decreasing nanoparticle size can increase the contact force and decrease the beam center deflection.
      Citation: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications
      PubDate: 2019-07-16T05:17:09Z
      DOI: 10.1177/1464420719861993
       
  • Analysis of wear behavior and surface properties of detonation gun-sprayed
           composite coating of Cr3C2–NiCr–CeO2 on boron steel
    • Authors: Jimmy Mehta, J. S. Grewal, Kishor Kumar Sadasivuni, Pallav Gupta
      First page: 2433
      Abstract: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Ahead of Print.
      The present paper reports the analysis of wear behavior and surface properties of detonation gun-sprayed composite coating of chromium carbide–nichrome–cerium oxide (Cr3C2–NiCr–CeO2) on boron steel. Experiments were performed to have complete understanding of wear rate and volume loss for the worn out surfaces. X-ray diffraction and scanning electron microscopy analysis were used for phase detection and microstructural characterization. Addition of rare earth metal improves the stickiness and avoids corrosion in the coating. Pin on disc test rig was used for the experimental purpose, and wear rate was calculated at three loads (30 N, 60 N and 90 N) in both dry and lubricating conditions. These tests were done for different cycles (to completely understand the wear behavior). From the results, it could be concluded that in lubrication state when the applied load is less, Cr3C2–NiCr+10% CeO2 coated sample shows the better result as compared to Cr3C2–NiCr+5% CeO2 and uncoated samples.
      Citation: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications
      PubDate: 2019-07-19T01:20:04Z
      DOI: 10.1177/1464420719862300
       
  • Investigation on the microstructure and mechanical properties of a
           dissimilar friction stir welded joint of magnesium alloys
    • Authors: Kulwant Singh, Gurbhinder Singh, Harmeet Singh
      First page: 2444
      Abstract: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Ahead of Print.
      In the current scenario, the light-weighting concept is the most important strategy to decrease fuel consumption as well as emissions of greenhouse gases. Magnesium alloys are attractive to various industries including transportation industry for their inherent light-weight. The friction stir welding is proficient to join magnesium alloys. In this article, a dissimilar friction stir welding butt joint between AZ31 and AZ61 magnesium alloys was fabricated, and microstructure and mechanical properties have been examined. The tool rotation speed of 1400 r/min and tool transverse feed rate of 25 mm/min was found quite suitable to fabricate a perfect joint of these dissimilar magnesium alloys. The stir zone was composed of fine and equiaxed grains and showed the highest microhardness value. In the advancing side, heat affected zone was composed of both equiaxed and elongated grains; however, in the retreating side, heat affected zone has relatively smooth grains. The tensile strength of the joint was about 138.37 ± 6.6 MPa. The efficiency of the joint was 51.25% with respect to AZ61 Mg alloy. The average impact toughness of friction stir welding joint was deteriorated by 16.67% and 28.5% with respect to base materials AZ31 and AZ61, respectively.
      Citation: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications
      PubDate: 2019-07-20T02:52:15Z
      DOI: 10.1177/1464420719865292
       
  • Numerical simulation of ductile fracture in polyethylene pipe with
           continuum damage mechanics and Gurson-Tvergaard-Needleman damage models
    • Authors: Yi Zhang, P-Y Ben Jar, Shifeng Xue, Lin Li
      First page: 2455
      Abstract: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Ahead of Print.
      A phenomenon-based hybrid approach of experimental testing and finite element simulations is used to describe the fracture behavior of pipe-grade polyethylene. The experimental testing adopts a modified D-split test method to stretch the pipe ring (notched pipe ring) specimens that have symmetric, double-edged flat notches along the pipe direction. Two series of experimental testing were conducted: (1) monotonic loading till fracture and (2) monotonic loading to a predefined strain level, keeping constant displacement for a period of time, and then unloaded. Crosshead speeds of 0.01, 1, and 100 mm/min were used in both series of tests. Likewise, two series of finite element simulation were conducted to establish the constitutive equations, either with or without considering damage evolution during the deformation process. The constitutive equation without the consideration of damage was established using results from the first series of experimental testing, and that with damage was inspired from the second series which showed the decrease in unloading modulus with the increase of crosshead speed or the predefined strain level. The results show that with the consideration of damage evolution, the constitutive equations enable the finite element simulation to determine the whole stress–strain relationship during both necking and fracture processes.
      Citation: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications
      PubDate: 2019-07-25T09:15:52Z
      DOI: 10.1177/1464420719863458
       
  • Preparation and characterization of pulsed electrodeposited
           cobalt–graphene nanocomposite coatings
    • Authors: R Raveen, J Yoganandh, S SathieshKumar, N Neelakandeswari
      First page: 2469
      Abstract: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Ahead of Print.
      Cobalt–graphene nanocomposite coatings possess unique mechanical and tribological properties which attract researchers to explore its potential for various industrial applications. This research work presents the investigation on cobalt–graphene nanocomposite coatings, with two different graphene compositions cobalt–graphene (0.15 and 0.45 wt%) prepared by pulsed electrodeposition from aqueous bath involving cobalt chloride, trisodium citrate, and citric acid on low carbon steel substrate. Studies on coating morphology, microhardness, tribological characteristics such as wear and corrosion for the cobalt–graphene nanocomposite coatings were reported. Cobalt–graphene (0.45 wt%) nanocomposite coating which exhibits low wear rate in all load conditions due to the self-lubricating property of graphene and cobalt–graphene (0.15 wt%) nanocomposite coating shows higher corrosion resistance due to its layered cauliflower surface morphology.
      Citation: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications
      PubDate: 2019-07-25T09:15:52Z
      DOI: 10.1177/1464420719863462
       
  • Vibration and stability analysis of functionally graded CNT-reinforced
           composite beams with variable thickness on elastic foundation
    • Authors: Ali Mohseni, M Shakouri
      First page: 2478
      Abstract: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Ahead of Print.
      The free vibration and buckling of functionally graded carbon nanotube reinforced composite beams with variable thickness resting on elastic foundations are investigated in the present paper. To account rotary inertia and transverse shear deformation effects, the Timoshenko beam theory is employed and governing equations are derived using Hamilton's principle. The obtained equations are solved using generalized differential quadrature method. Different carbon nanotube distributions through the thickness are considered, and the rule of mixture is used to describe the effective material properties of the functionally graded reinforced beams. The results are validated with available investigations, and the effects of boundary conditions, nanotube volume fraction and distribution, foundation and thickness ratio on both natural frequency and buckling load are studied. Finally, due to the weight optimization in aerospace and turbomachinery applications, the optimum beam shape and nanotube distribution are suggested to achieve the most capacity of bearing axial loads with fixed weight.
      Citation: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications
      PubDate: 2019-07-30T04:36:46Z
      DOI: 10.1177/1464420719866222
       
  • Optimisation of hybridised cane wood–palm fruit fibre frictional
           material
    • Authors: CH Achebe, EN Obika, JL Chukwuneke, OE Ani
      First page: 2490
      Abstract: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Ahead of Print.
      A brake pad has been developed employing a hybrid of cane wood and palm fruit fibre as filler material. The filler materials were extracted and processed; however, the palm fruit fibre was further treated with NaOH to remove oil remnants. After proper drying, the filler materials were ground and sieved into 150 µm particle size. The experimental design was set up using Central Composite Design in Design Expert software. The design varied the percentage composition of the filler materials and the binder. At constant press time of 8 min, press temperature of 160 ℃ and curing time of 2 h, 20 test samples were produced and tested for mechanical and physical properties. These include hardness, wear rate and water absorption. The Fourier transform infrared analyses showed that both cane wood and palm fruit fibres have active alcohol (O–H) and amine (C–N) functional groups. The experimental results were analysed and optimised using response surface methodology and validated using the analysis of variance tool of the Design Expert software. An optimal 30% resin, 3.48% palm fruit fibre and 6.52% cane wood composition by mass was developed, which gave a product with 98.25 MPa hardness, 4.13 mg/m wear rate and 0.494% water absorption. This result indicated that hybridised cane wood–palm fruit fibre is a good filler material for brake pad production.
      Citation: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications
      PubDate: 2019-07-30T04:36:46Z
      DOI: 10.1177/1464420719863445
       
  • Experimental and empirical study of large transverse deformation of
           triangular plates subjected to water hammer shock loading
    • Authors: Mojtaba Haghgoo, Mohammad Rezasefat, Ali Mahmoudi, Hashem Babaei
      First page: 2498
      Abstract: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications, Ahead of Print.
      In this paper, the dynamic plastic response of isosceles triangular plates under hydrodynamic loads was investigated experimentally using a drop hammer machine. To do this, a series of experimental tests were carried out on mild steel triangular plates with different thicknesses to bring insight into the effect of geometry and mechanical properties of the plate on the deformation of specimens, which were impacted by a piston-induced pressure wave inside a water tube. The effects of various impact loads originated from different drop hammer standoff distances, and hammer weights concerning variations of deflection of the center of mass were described. The experimental results were presented in terms of deflection of the center of mass of the plates and deflection profiles. The experimental results showed that the plate with lower thickness experienced higher deflection-to-thickness ratio. An empirical model was also proposed based on new dimensionless numbers for triangular plates in order to predict the ratio of deflection of the center of mass to thickness. The dimensionless numbers considered the effects of plate geometry, hydrodynamic applied load, and mechanical properties of materials. Comparison between the experimental results and empirical predictions demonstrated that the suggested model is accurate enough to predict of the response of isosceles triangular plates under hydrodynamic loads.
      Citation: Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications
      PubDate: 2019-08-15T07:12:43Z
      DOI: 10.1177/1464420719869748
       
 
 
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