首页 > 最新文献

International Journal of Materials and Structural Integrity最新文献

英文 中文
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
Q4 Engineering Pub Date : 2018-08-09 DOI: 10.1504/IJMSI.2018.10014948
W. Ma, X. Bai
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.
为大型预应力矩形渡槽的设计提供理论依据,节省工程投资,保证渡槽结构的安全可靠。本文采用混合离散变量优化设计方法对南水北调沙河渡槽进行优化设计,优化设计的目标函数为工程造价。计算结果表明,矩形渡槽优化设计方案经济合理,渡槽结构满足强度和刚度条件,风荷载对渡槽应力和变形分布影响不大,而水压对渡槽的应力和形变分布影响较大。矩形渡槽中,当纵梁与横肋连接处出现应力集中现象时,局部应力较大。
{"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
Q4 Engineering Pub Date : 2018-08-09 DOI: 10.1504/IJMSI.2018.10014933
M. Khatir, M. Temmar, H. Mohamed
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.
热处理可以显著改变材料的性能和微观结构。然而,很少有研究涉及焊后热处理(PWHT)对AA7075-T6搅拌摩擦焊接头力学性能和微观结构变化的影响。本研究的目的是研究几种焊后热处理的效果。采用不同的固溶热处理,然后在环境水中淬火,并在不同的时效时间内进行不同的时效处理,以改善FSW工艺焊接的3mm铝合金7075-T6板的力学性能。使用焊接中和焊后热处理的破坏性试验“维氏硬度试验”获得整个焊缝的硬度分布。通过光学显微镜对微观结构进行表征,以比较经处理和未经处理的焊接板。实验结果表明,搅拌摩擦焊接过程会导致连接区硬度损失和微观组织变化,这主要取决于焊接参数,包括:刀具形状、转速、速度或行进速度以及刀具倾斜。焊后热处理导致接头区域微观结构的显著变化,并为焊缝硬度的损失提供了补救措施。
{"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
Q4 Engineering 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
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.
本研究的目的是通过测定白骨料的理化性质和表面形貌,探讨白骨料作为建筑原料的可行性。本文报告了一项旨在确定骨料的化学和矿物学特征及其对混凝土性能可能影响的实验室试验方案的结果。紫外可见光谱(UV-vis)、x射线荧光(ED-XRF)和x射线衍射(XRD)分析分别用于化学和矿物学表征。用扫描电子显微镜(SEM)测定表面形貌。观察到马来西亚白骨料含有大量粉砂质物质(约9%)。与其他天然团聚体相比,其sio2(62.5%)和K2O(6.94%)含量也较高。表面形貌分析清楚地表明,所研究的骨料中存在坡缕石和蒙脱石物质。
{"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
Q4 Engineering Pub Date : 2018-08-09 DOI: 10.1504/IJMSI.2018.10014935
B. Sahoo, S. K. Panigrahi, Shri R.K. Satpathy
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.
近年来,定向凝固涡轮叶片以其优异的抗蠕变性能在先进航空发动机中得到了广泛的应用。涡轮叶片上的铝涂层可防止高温氧化和腐蚀。军用燃气涡轮发动机的涡轮叶片在启动和停止循环期间受到低周疲劳(LCF)损伤。本文研究了定向凝固镍基超级合金MARM002的低周疲劳寿命。通过在900°C下进行应变控制LCF试验,评估了渗铝对DS合金MAR M002 LCF寿命的影响,应变幅度(Δet/2)分别为±0.3%、±0.5%和±0.8%,应变比(R)为-1。在低应变下,涂层有利于LCF寿命。循环加载过程中产生的累积塑性应变和拉伸应力以及刚度比被用来关联疲劳寿命。断口分析显示涂层中出现裂纹和多个二次裂纹。
{"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
Q4 Engineering Pub Date : 2017-10-16 DOI: 10.1504/IJMSI.2017.10008096
J. Gao, J. Chu, L. Guan, Ran Zhang
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.
研究了分布在猫头鹰翅膀表面的天鹅绒羽绒材料的无声飞行特性。为了促进猫头鹰特殊柔软细长的远侧倒钩的技术应用,我们对长耳猫头鹰初级羽毛上分支的倒钩的形态和力学特征进行了研究。在研制的微型拉伸试验机上对倒钩进行了拉伸试验,并用标准线性固体模型描述了倒钩的应力和应变的粘弹性响应。将Barbules的几何尺寸和力学性能与其他羽毛分级分支(轴、倒刺、barbicel)的几何大小和力学性能进行了比较。因此,对于整个长耳猫头鹰初级羽毛,建立了分支直径和机械性能相对于分支长度的比例关系。本研究的目的是为航空、航天、海洋等领域使用的仿生降噪部件的材料和结构设计提供依据。
{"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
Q4 Engineering Pub Date : 2017-10-16 DOI: 10.1504/IJMSI.2017.10008094
J. Correia, A. Jesus, A. S. Ribeiro, A. Fernandes
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.
提出了基于弹塑性应力-应变历史的疲劳裂纹扩展模型、裂纹尖端附近的疲劳裂纹扩展模型和应变-寿命损伤模型。UniGrow模型是疲劳裂纹扩展模型的一个特例。裂纹尖端的残余应力在这些模型中起着核心作用,因为它们被用来评估实际的疲劳裂纹驱动力,同时考虑了平均应力和加载的顺序效应。基于现有的6061-T651铝合金恒幅裂纹扩展实验数据,对UniGrow模型的性能进行了评估。讨论了利用UniGrow模型进行疲劳裂纹扩展预测的关键问题,特别是残余应力的演化。利用现有的应变寿命数据,考虑应力r比效应,可以对AA6061-T651的疲劳裂纹扩展行为进行建模。预测结果与实验裂纹扩展数据吻合较好。
{"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
Q4 Engineering Pub Date : 2017-10-16 DOI: 10.1504/IJMSI.2017.10008107
Xiaolin Deng, Wangyu Liu
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.
利用Abaqus/Explicit设计并分析了一种新型的夹层多胞锥形管。比较了三种不同锥形管,即普通锥形管、四孔锥形管和SMC管的性能。研究了影响耐撞性能的因素。然后,根据该调查确定了优化目标和设计变量。采用最优拉丁超立方体设计方法来定义用于建立和评估代理模型的样本点。最后,利用Abaqus/Explicit对样本点进行了数值模拟。利用克里格方法和仿真结果,建立了具有比能量吸收、最大挤压力和挤压力效率三个不同指标的替代模型。使用四种不同的方法来评估代理模型的准确性。最后,利用非支配排序遗传算法II对多目标问题进行了优化。
{"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
Q4 Engineering Pub Date : 2017-10-16 DOI: 10.1504/IJMSI.2017.10008166
Yan Li, Q. Fang, C. Lin, D. Guo, Miao Wang
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.
温度裂缝的存在严重影响了填充墙的使用。本文报道了这方面的有限元数值模拟分析。讨论了壁面温度应力的计算方法,找到了确定温度裂缝位置的方法。在此基础上,对基于温度效应的墙体裂缝设计理论进行了研究。通过实时结构试验,研究了影响墙体开裂的温度收缩的主要因素。研究发现,温度收缩在早期发展迅速,然后逐渐减缓,28天后,每个试样的收缩几乎稳定。与标准养护条件相比,自然养护条件下的温度收缩更为明显。水泥砂浆在降低温度收缩方面的收缩效果也优于混合砂浆。这些结论为控制墙体开裂提供了参考。
{"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
Q4 Engineering Pub Date : 2017-10-16 DOI: 10.1504/IJMSI.2017.10008097
M. Manouchehrian
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.
采用热蒸发技术从Te粉末中沉积了不同温度(400、450和500°C)的TeO2薄膜。XRD图谱表明,随着温度的升高,结晶度提高。观察SEM获得的图像,可以看出晶粒尺寸随着温度的升高而减小。通过透射光谱和反射光谱测定了薄膜的光学能隙。随着温度的升高,光学能隙从3.95eV连续下降到3.80eV。研究沉积温度对NH3气体测量的影响,发现随着沉积温度的升高,灵敏度增加,响应时间和恢复时间减少。
{"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
Q4 Engineering Pub Date : 2017-10-16 DOI: 10.1504/IJMSI.2017.10008104
Zhixiang Liu, Daojun Zang, Shuai Xu, Yan Wang, Chunhui Xu, Ping Yang
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.
由于太阳能电池具有无污染、可再生和清洁的能源,越来越多的无机材料被用于太阳能电池的研究。本文研究了氧化锌、砷化镓、钙钛矿和石墨烯材料作为无机化合物或材料的代表;讨论了能带结构、掺杂态密度、材料结构等参数对光电转换效率的影响。研究结果将为进一步设计和制造太阳能电池提供一些参考。
{"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
期刊
International Journal of Materials and Structural Integrity
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1