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International Journal of Materials and Structural Integrity最新文献

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Optimisation design and structure analysis of large-scale prestressed rectangular aqueduct 大型预应力矩形渡槽优化设计与结构分析
International Journal of Materials and Structural Integrity Pub Date : 2018-08-09 DOI: 10.1504/IJMSI.2018.10014948
W. Ma, X. Bai
{"title":"Optimisation design and structure analysis of large-scale prestressed rectangular aqueduct","authors":"W. Ma, X. Bai","doi":"10.1504/IJMSI.2018.10014948","DOIUrl":"https://doi.org/10.1504/IJMSI.2018.10014948","url":null,"abstract":"In order to provide theoretical basis for the design of large-scale prestressed rectangular aqueduct, saving engineering investment, and ensuring the safety and reliability of aqueduct structure. This paper adopts mixed discrete variable optimisation design method to carry out optimisation design for Sha river aqueduct of the south-to-north water diversion project, the objective function of optimisation design is project cost. Calculated results show that, optimisation design scheme of rectangular aqueduct is economic and reasonable, aqueduct structure meets the strength condition and stiffness condition, wind load has little effect for stress and deformation distribution of aqueduct, but water pressure has great effect for stress and deformation distribution of aqueduct. When stress concentration phenomenon at the junction of the longitudinal beams and transverse ribs in the rectangular aqueduct occurs, local stress is higher.","PeriodicalId":39035,"journal":{"name":"International Journal of Materials and Structural Integrity","volume":"12 1","pages":"245"},"PeriodicalIF":0.0,"publicationDate":"2018-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43259382","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Experimental study on hardness property improved by PWHT of AA-7075-T6 welded by FSW process FSW焊接AA-7075-T6的PWHT提高硬度的试验研究
International Journal of Materials and Structural Integrity Pub Date : 2018-08-09 DOI: 10.1504/IJMSI.2018.10014933
M. Khatir, M. Temmar, H. Mohamed
{"title":"Experimental study on hardness property improved by PWHT of AA-7075-T6 welded by FSW process","authors":"M. Khatir, M. Temmar, H. Mohamed","doi":"10.1504/IJMSI.2018.10014933","DOIUrl":"https://doi.org/10.1504/IJMSI.2018.10014933","url":null,"abstract":"Heat treatment can sensibly change the properties and microstructure of the material. Nevertheless, few studies have addressed the effect of postweld heat treatment (PWHT) on the mechanical properties and microstructure change of the friction stir welded joints of AA7075-T6. The purpose of this study is to investigate the effect of several post-weld heat treatments. Using different solution heat treatment, followed by quenching in ambient water and different ageing treatment for a different ageing time to improve the mechanical properties of 3 mm aluminium alloy 7075-T6 plate welded by FSW processes. Hardness profile is obtained across the weld using destructive test 'Vickers's hardness test' for both as-welded and post-weld heat treatment. Microstructure is characterised by the optical microscope to compare both treated and non-treated welded plate. The experimental results prove that friction stir welding process resulted in a loss of hardness and change in microstructure on the joined zone, dependent mostly on welding parameters including: tool shape, rotation speed, velocity or travel speed and tool tilt. The post-weld heat treatments lead to a significant change of microstructure in the joint area and provide a remedy for the loss of hardness of the welded bead.","PeriodicalId":39035,"journal":{"name":"International Journal of Materials and Structural Integrity","volume":"12 1","pages":"44"},"PeriodicalIF":0.0,"publicationDate":"2018-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49275283","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Physiochemical characterisation of Malaysian white aggregate for use in sustainable concrete structure 用于可持续混凝土结构的马来西亚白骨料的物理化学特性
International Journal of Materials and Structural Integrity Pub Date : 2018-08-09 DOI: 10.1504/IJMSI.2018.10014932
M.Z.H. Khan, M. Z. Khan, M. R. Hasan, M. A. Rahman, Md. Abu Naser Shatez
{"title":"Physiochemical characterisation of Malaysian white aggregate for use in sustainable concrete structure","authors":"M.Z.H. Khan, M. Z. Khan, M. R. Hasan, M. A. Rahman, Md. Abu Naser Shatez","doi":"10.1504/IJMSI.2018.10014932","DOIUrl":"https://doi.org/10.1504/IJMSI.2018.10014932","url":null,"abstract":"The purpose of this study is to investigate the feasibility of using white aggregate as a construction raw material by determining its physiochemical properties, as well as its surface morphology. The results of a laboratory experimental programme aimed at establishing chemical and mineralogical characteristics of aggregate and its likely influence on concrete performance are reported in this paper. UV visible spectroscopy (UV-vis), X-ray fluorescence (ED-XRF) and X-ray diffraction (XRD) analyses were used for chemical and mineralogical characterisation, respectively. Surface morphology was determined by using scanning electron microscopy (SEM) instrument. It was observed that Malaysian white aggregate contains large amount of silt materials (about 9%). It also contains high amount of SiO3 (62.5%) and K2O (6.94%) compared with other natural aggregates. The surface morphology analysis clearly revealed the existence of palygorskite and smectite materials in the studied aggregate.","PeriodicalId":39035,"journal":{"name":"International Journal of Materials and Structural Integrity","volume":"12 1","pages":"36"},"PeriodicalIF":0.0,"publicationDate":"2018-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47369392","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Effect of aluminising on the low cycle fatigue life of a directionally solidified nickel-base alloy used for manufacturing turbine blade 渗铝对涡轮叶片用定向凝固镍基合金低周疲劳寿命的影响
International Journal of Materials and Structural Integrity Pub Date : 2018-08-09 DOI: 10.1504/IJMSI.2018.10014935
B. Sahoo, S. K. Panigrahi, Shri R.K. Satpathy
{"title":"Effect of aluminising on the low cycle fatigue life of a directionally solidified nickel-base alloy used for manufacturing turbine blade","authors":"B. Sahoo, S. K. Panigrahi, Shri R.K. Satpathy","doi":"10.1504/IJMSI.2018.10014935","DOIUrl":"https://doi.org/10.1504/IJMSI.2018.10014935","url":null,"abstract":"In the recent years, directionally solidified (DS) turbine blades are found widely in advanced aero-engines owing to their excellent creep resistance properties. Aluminising coating on turbine blades protects against high temperature oxidation and corrosion. Turbine blades of a military gas turbine engine are subjected to low cycle fatigue (LCF) damage during START and STOP cycles. The present investigation deals with the low cycle fatigue (LCF) life of a directionally solidified nickel-base super alloy MAR M 002. Influence of aluminising on LCF life of the DS alloy MAR M002 has been evaluated by carrying out strain controlled LCF test at 900°C with strain amplitudes (Δet/2) of ±0.3%, ±0.5%, and ±0.8% at a strain ratio (R) of –1. At low strain, coating favours LCF life. Accumulated plastic strain and tensile stress developed during cyclic loading and stiffness ratio are being used to correlate fatigue life. Fractography revealed initiation of cracks in the coating and multiple secondary cracks.","PeriodicalId":39035,"journal":{"name":"International Journal of Materials and Structural Integrity","volume":"12 1","pages":"58"},"PeriodicalIF":0.0,"publicationDate":"2018-08-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45949007","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Mechanical properties and size scaling of long-eared owl primary feather 长耳猫头鹰原羽的力学性能及尺寸尺度
International Journal of Materials and Structural Integrity Pub Date : 2017-10-16 DOI: 10.1504/IJMSI.2017.10008096
J. Gao, J. Chu, L. Guan, Ran Zhang
{"title":"Mechanical properties and size scaling of long-eared owl primary feather","authors":"J. Gao, J. Chu, L. Guan, Ran Zhang","doi":"10.1504/IJMSI.2017.10008096","DOIUrl":"https://doi.org/10.1504/IJMSI.2017.10008096","url":null,"abstract":"Velvety down material distributed over the owl wing surface has been investigated for the silent flight characteristics. In order to promote the technical application of the owl's special soft elongated distal barbules, we presented a study on the morphological and mechanical characterisation of the barbules branched on the long-eared owl primary feather. Tensile experiments of the barbules were conducted on a developed micro-tensile tester, and viscoelastic response of their stress and strain was described by the standard linear solid model. Barbules' geometry sizes and mechanical properties were compared with those of other feather hierarchical branches (rachis, barb, barbicel). Consequently, for the whole long-eared owl primary feather, scaling relationships of both the branching diameters and mechanical properties with respect to the branching lengths were established. The purpose of this investigation was to provide a basis for the material and structure design of bionic noise reduction components used in aviation, aerospace, marine and other fields.","PeriodicalId":39035,"journal":{"name":"International Journal of Materials and Structural Integrity","volume":"11 1","pages":"32"},"PeriodicalIF":0.0,"publicationDate":"2017-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"42397733","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Strain-based approach for fatigue crack propagation simulation of the 6061-T651 aluminium alloy 基于应变的6061-T651铝合金疲劳裂纹扩展模拟
International Journal of Materials and Structural Integrity Pub Date : 2017-10-16 DOI: 10.1504/IJMSI.2017.10008094
J. Correia, A. Jesus, A. S. Ribeiro, A. Fernandes
{"title":"Strain-based approach for fatigue crack propagation simulation of the 6061-T651 aluminium alloy","authors":"J. Correia, A. Jesus, A. S. Ribeiro, A. Fernandes","doi":"10.1504/IJMSI.2017.10008094","DOIUrl":"https://doi.org/10.1504/IJMSI.2017.10008094","url":null,"abstract":"Fatigue crack growth models based on elastic-plastic stress-strain histories, at the crack tip vicinity, and strain-life damage models have been proposed. The UniGrow model is a particular case of fatigue crack propagation models. The residual stresses developed at the crack tip play a central role in these models, since they are used to assess the actual fatigue crack driving force, taking into account mean stress and loading sequential effects. The performance of the UniGrow model is assessed based on available experimental constant amplitude crack propagation data, derived for the 6061-T651 aluminium alloy. Key issues in fatigue crack growth prediction, using the UniGrow model, in particular the residual stresses evolution, are discussed. Using available strain-life data, it was possible to model the fatigue crack propagation behaviour for the AA6061-T651, taking into account the stress R-ratio effects. A satisfactory agreement was found, between the predictions and the experimental crack propagation data.","PeriodicalId":39035,"journal":{"name":"International Journal of Materials and Structural Integrity","volume":"11 1","pages":"1"},"PeriodicalIF":0.0,"publicationDate":"2017-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47345388","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 15
Crashworthiness research and optimisation design of sandwich multi-cell conical tube under axial impact 夹层多单元圆锥管轴向碰撞耐撞性研究与优化设计
International Journal of Materials and Structural Integrity Pub Date : 2017-10-16 DOI: 10.1504/IJMSI.2017.10008107
Xiaolin Deng, Wangyu Liu
{"title":"Crashworthiness research and optimisation design of sandwich multi-cell conical tube under axial impact","authors":"Xiaolin Deng, Wangyu Liu","doi":"10.1504/IJMSI.2017.10008107","DOIUrl":"https://doi.org/10.1504/IJMSI.2017.10008107","url":null,"abstract":"A novel sandwich multi-cell conical (SMC) tube was designed and analysed by using Abaqus/Explicit. The performances of three different conical tubes, i.e., ordinary conical tube, four cell conical tube and SMC tube, were compared. The variables that influence the performances of crashworthiness were investigated. Then, according to this investigation the optimisation goal and design variables are determined. Optimal Latin hypercube design method was adopted to define the sample points for establishing and evaluating the surrogate model. Finally, a numerical simulation on the sample points was performed by utilising Abaqus/Explicit. The surrogate model with three different indicators, i.e., the specific energy absorption, the maximum crush force, and the crush force efficiency, was constructed by using kriging method and the simulation results. The accuracy of surrogate model was evaluated with four distinct methods. Finally, the non-dominated sorting genetic algorithm-II was utilised to optimise the multi-objective problem.","PeriodicalId":39035,"journal":{"name":"International Journal of Materials and Structural Integrity","volume":"11 1","pages":"82"},"PeriodicalIF":0.0,"publicationDate":"2017-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41595345","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
Thermodynamic analysis of temperature shrinkage effect of wall filled frame structure 填充墙框架结构温度收缩效应的热力学分析
International Journal of Materials and Structural Integrity Pub Date : 2017-10-16 DOI: 10.1504/IJMSI.2017.10008166
Yan Li, Q. Fang, C. Lin, D. Guo, Miao Wang
{"title":"Thermodynamic analysis of temperature shrinkage effect of wall filled frame structure","authors":"Yan Li, Q. Fang, C. Lin, D. Guo, Miao Wang","doi":"10.1504/IJMSI.2017.10008166","DOIUrl":"https://doi.org/10.1504/IJMSI.2017.10008166","url":null,"abstract":"The existence of temperature cracks seriously affects the use of infilled walls. This paper reports on the analysis of finite element numerical simulation about this. The calculation method of wall temperature stress had been discussed, and found the determining method for location of temperature crack. And on this basis, it studied on the wall crack design theory based on temperature effect. Though the real-time substructure test, research the main factors of temperature shrinkage that affect wall cracking. It was found that the temperature contraction developed rapidly in the early stage, and then slowed down gradually, after 28 days, the shrinkage of each specimen was almost stable. Compared with the standard curing condition, the temperature shrinkage was more obvious under natural curing condition. Also the cement mortar shrinkage effect is better than that of mixed mortar in reducing temperature shrinkage. These conclusions provide a reference for controlling the cracking of wall.","PeriodicalId":39035,"journal":{"name":"International Journal of Materials and Structural Integrity","volume":"11 1","pages":"131"},"PeriodicalIF":0.0,"publicationDate":"2017-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49594824","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Temperature effect on structural, optical and NH3 gas sensing properties of TeO2 thin films 温度对TeO2薄膜结构、光学和NH3气敏性能的影响
International Journal of Materials and Structural Integrity Pub Date : 2017-10-16 DOI: 10.1504/IJMSI.2017.10008097
M. Manouchehrian
{"title":"Temperature effect on structural, optical and NH3 gas sensing properties of TeO2 thin films","authors":"M. Manouchehrian","doi":"10.1504/IJMSI.2017.10008097","DOIUrl":"https://doi.org/10.1504/IJMSI.2017.10008097","url":null,"abstract":"TeO2 thin films with different temperatures (400, 450 and 500°C) were deposited on glass substrates by thermal evaporation technique from a Te powder. XRD patterns indicate that as the temperature increases, the crystallisation improves. Observing the images obtained by SEM, it is seen that the grain size decreases as the temperature increases. The optical energy gap of the films was determined from transmittance and reflectance spectra. The optical energy gap decreased continuously from 3.95 eV to 3.80 eV with increasing temperature. Studying the effect of deposition temperature on NH3 gas measurement, it became obvious that as the deposition temperature increases, the sensitivity increases and the response and recovery times decrease.","PeriodicalId":39035,"journal":{"name":"International Journal of Materials and Structural Integrity","volume":"11 1","pages":"51"},"PeriodicalIF":0.0,"publicationDate":"2017-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41847886","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
An exploratory review on some inorganic materials and structure of solar cells 太阳能电池的一些无机材料和结构研究进展
International Journal of Materials and Structural Integrity Pub Date : 2017-10-16 DOI: 10.1504/IJMSI.2017.10008104
Zhixiang Liu, Daojun Zang, Shuai Xu, Yan Wang, Chunhui Xu, Ping Yang
{"title":"An exploratory review on some inorganic materials and structure of solar cells","authors":"Zhixiang Liu, Daojun Zang, Shuai Xu, Yan Wang, Chunhui Xu, Ping Yang","doi":"10.1504/IJMSI.2017.10008104","DOIUrl":"https://doi.org/10.1504/IJMSI.2017.10008104","url":null,"abstract":"Because of the pollution-free, renewable and clean energy of solar cells, more and more inorganic materials are used for solar cell research. Zinc oxide, gallium arsenide, perovskite and graphene materials are studied in this paper as the representatives of inorganic compounds or materials; we discuss the parameters such as band structure, density of states of doping and structure of materials, and their effects on the photoelectric conversion efficiency are also reviewed. Study results will provide some reference for further designing and manufacturing solar cells.","PeriodicalId":39035,"journal":{"name":"International Journal of Materials and Structural Integrity","volume":"11 1","pages":"62"},"PeriodicalIF":0.0,"publicationDate":"2017-10-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47645281","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 4
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