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International Journal of Materials and Structural Integrity最新文献

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Doping level effect on the luminescence efficiency of Sm3+-doped BaWO4 phosphors prepared by sol-gel process 掺杂水平对溶胶-凝胶法制备Sm3+掺杂BaWO4荧光粉发光效率的影响
International Journal of Materials and Structural Integrity Pub Date : 2016-10-10 DOI: 10.1504/IJMSI.2016.079652
H. He
{"title":"Doping level effect on the luminescence efficiency of Sm3+-doped BaWO4 phosphors prepared by sol-gel process","authors":"H. He","doi":"10.1504/IJMSI.2016.079652","DOIUrl":"https://doi.org/10.1504/IJMSI.2016.079652","url":null,"abstract":"The Sm-doped BaWO4 phosphor powders with Sm content of 0-7.5 at.% were fabricated with a sol-gel method. X-ray diffraction analysis, scanning electron microscopy, and photoluminescence spectra analysis were used to characterise the microstructural and photoluminescence efficiency. The effect of Sm doping level was studied. A granular particle morphology and decreased nanoscale average particles size with increasing Sm-doping level were observed. The matrix showed weak violet-blue emission. The Sm3+ in the BaWO4 matrix showed red emission that is obviously stronger than violet-blue emission of the matrix. A maximal doping level of Sm3+ cation was observed for a highest emission efficiency of Sm3+ cation.","PeriodicalId":39035,"journal":{"name":"International Journal of Materials and Structural Integrity","volume":"10 1","pages":"1"},"PeriodicalIF":0.0,"publicationDate":"2016-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/IJMSI.2016.079652","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66768096","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
Computer simulation for dynamic characteristics of proton exchange membrane fuel cell 质子交换膜燃料电池动态特性的计算机模拟
International Journal of Materials and Structural Integrity Pub Date : 2016-10-10 DOI: 10.1504/IJMSI.2016.079645
Tao Chen, Shuliang Liu, Hanxia Ruan
{"title":"Computer simulation for dynamic characteristics of proton exchange membrane fuel cell","authors":"Tao Chen, Shuliang Liu, Hanxia Ruan","doi":"10.1504/IJMSI.2016.079645","DOIUrl":"https://doi.org/10.1504/IJMSI.2016.079645","url":null,"abstract":"Mathematical modelling is essential to investigate the performance of proton exchange membrane fuel cell (PEMFC). In this paper, a system-level dynamic model of PEMFC is developed using the semi-empirical equations. The proposed model is implemented in MATLAB/SIMULINK software to simulate the dynamic characteristics of PEMFC. The dynamic response characteristics of PEMFC are conducted and analysed under multiple layers of step change in the fuel cell loads, which is defined as the input source. The research we have done suggests that is useful to improve the design and performance of PEMFC.","PeriodicalId":39035,"journal":{"name":"International Journal of Materials and Structural Integrity","volume":"10 1","pages":"108"},"PeriodicalIF":0.0,"publicationDate":"2016-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/IJMSI.2016.079645","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66768017","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
Evaluation of mode 1 stress intensity factor for edge crack using displacement extrapolation method 用位移外推法评价边缘裂纹的1型应力强度因子
International Journal of Materials and Structural Integrity Pub Date : 2016-10-10 DOI: 10.1504/IJMSI.2016.079651
L. Kirthan, R. Hegde, V. Girisha, R. G. Kumar
{"title":"Evaluation of mode 1 stress intensity factor for edge crack using displacement extrapolation method","authors":"L. Kirthan, R. Hegde, V. Girisha, R. G. Kumar","doi":"10.1504/IJMSI.2016.079651","DOIUrl":"https://doi.org/10.1504/IJMSI.2016.079651","url":null,"abstract":"Fracture is a failure mode due to unstable propagation of a crack due to applied stress. This paper aims towards evaluating stress intensity factor for mode 1 crack propagation using compact tension specimen using displacement extrapolation method and comparing it with analytical solutions. Compact tension specimen was tested for mode 1 crack propagation and stress intensity factor was evaluated for different crack lengths. Displacement extrapolation method was used to find the stress intensity factor by considering the displacements at the flagged nodes near the crack tip and then was compared with the analytical results. Displacement extrapolation method showed good agreement with the analytical results. The results show that the SIF increased at a very slow rate in the beginning of the crack growth and increased rapidly later. This was because of the plastic zone at the crack tip getting increased. This increased the resistance offered by the crack to the propagation.","PeriodicalId":39035,"journal":{"name":"International Journal of Materials and Structural Integrity","volume":"10 1","pages":"11"},"PeriodicalIF":0.0,"publicationDate":"2016-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/IJMSI.2016.079651","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66768085","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: 3
Multi-domain unified modelling and control parameters optimisation of magnetorheological brake based on Modelica 基于Modelica的磁流变制动器多域统一建模及控制参数优化
International Journal of Materials and Structural Integrity Pub Date : 2016-10-10 DOI: 10.1504/IJMSI.2016.079639
Zhihua Li, Longhao Yuan, Chaoqun Nie
{"title":"Multi-domain unified modelling and control parameters optimisation of magnetorheological brake based on Modelica","authors":"Zhihua Li, Longhao Yuan, Chaoqun Nie","doi":"10.1504/IJMSI.2016.079639","DOIUrl":"https://doi.org/10.1504/IJMSI.2016.079639","url":null,"abstract":"In order to solve the problem of modelling, simulation and optimisation of magnetorheological brake (MR brake) which is a multi-domain coupling system, the braking performance and control parameters optimisation of MR brake were investigated under a quarter-car model. Firstly, based on Modelica/MWorks platform, using multi-domain unified modelling method, a multi-domain unified MR brake model with anti-lock braking system (ABS) was built. Then by using response surface method (RSM), the response surface function to express the relation between braking distance and three control parameters was formulated, and the optimisation problem of control parameters was solved at MWorks. Finally, according to the optimal control parameters and the structure parameters of MR brake designed by our group before, the simulation of the multi-domain unified MR brake model was done to analyse the change regularity of vehicle speed, slip ratio, braking distance, control current, braking time, etc. under the effect of controller. Results show that MR brake with optimal control parameters has a good braking performance and can meet the requirements of GB7258-2012 standard. This lays the foundation of application of MR brake in vehicles.","PeriodicalId":39035,"journal":{"name":"International Journal of Materials and Structural Integrity","volume":"10 1","pages":"81"},"PeriodicalIF":0.0,"publicationDate":"2016-10-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1504/IJMSI.2016.079639","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66767737","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
Elimination of boundary effect in silicon electrochemical etching via mechanical stress 利用机械应力消除硅电化学蚀刻中的边界效应
International Journal of Materials and Structural Integrity Pub Date : 2016-01-01 DOI: 10.1504/IJMSI.2016.10003022
D. Ge, Le Lu, Huang Xiukang, Z. Jinhua, Dongliang Qian, Liqiang Zhang, Zhibao Li
{"title":"Elimination of boundary effect in silicon electrochemical etching via mechanical stress","authors":"D. Ge, Le Lu, Huang Xiukang, Z. Jinhua, Dongliang Qian, Liqiang Zhang, Zhibao Li","doi":"10.1504/IJMSI.2016.10003022","DOIUrl":"https://doi.org/10.1504/IJMSI.2016.10003022","url":null,"abstract":"Application of thick macroporous silicon is always one of the hotspots in electrochemistry including micromachining and chemical sensing. One serious problem in macropore formation with high depth-width ratio is the boundary effect. In this work, we applied mechanical stress onto the boundary region of electrochemical etching, which helps to passivate the sidewall of macropore in boundary area, and therefore eliminate the boundary effect effectively. The CBM model was employed to explain the mechanism. Thick macroporous layers without boundary effect were successfully produced in both n-type and p-type silicon.","PeriodicalId":39035,"journal":{"name":"International Journal of Materials and Structural Integrity","volume":"10 1","pages":"170"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66767719","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
Research on comprehensive information model of complex flexible harness under virtual environment 虚拟环境下复杂柔性线束综合信息模型研究
International Journal of Materials and Structural Integrity Pub Date : 2016-01-01 DOI: 10.1504/IJMSI.2016.10003020
Y. Shang, Dan Liu, Yuan-Shin Lee, Chunquan Li, Ming Zhang, Hongyang Wang
{"title":"Research on comprehensive information model of complex flexible harness under virtual environment","authors":"Y. Shang, Dan Liu, Yuan-Shin Lee, Chunquan Li, Ming Zhang, Hongyang Wang","doi":"10.1504/IJMSI.2016.10003020","DOIUrl":"https://doi.org/10.1504/IJMSI.2016.10003020","url":null,"abstract":"For the disadvantage of production mode of harness manual measurement, harness automatic forming will become the development trend in the field of harness products. Among that, the information expression of harness plays an important role in harness automatic forming. Firstly, the complex flexible harness comprehensive information model (CFHCIM) is built and how to build the model is described. Then harness expression is described in detail from four aspects of auxiliary components information, electric information, connection information and harness structure information. Finally, the implementation of harness information expression from wiring model verifies the effectiveness of CFHCIM by the UG secondary development, which provides a new thought and method for information expression of harness. At the same time, CFHCIM carries out the preliminary exploration of providing information support for harness automatic forming.","PeriodicalId":39035,"journal":{"name":"International Journal of Materials and Structural Integrity","volume":"10 1","pages":"195"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66768153","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 of concrete using recycled coarse aggregate 再生粗骨料混凝土试验研究
International Journal of Materials and Structural Integrity Pub Date : 2016-01-01 DOI: 10.1504/IJMSI.2016.10003018
H. E. Opara, U. G. Eziefula, C. C. Ugwuegbu
{"title":"Experimental study of concrete using recycled coarse aggregate","authors":"H. E. Opara, U. G. Eziefula, C. C. Ugwuegbu","doi":"10.1504/IJMSI.2016.10003018","DOIUrl":"https://doi.org/10.1504/IJMSI.2016.10003018","url":null,"abstract":"An experimental study of recycled aggregate concrete (RAC) using recycled coarse aggregate (RCA) is reported. The RCA was obtained from construction and demolition waste (C&DW) and used as full replacement of natural coarse aggregate (NCA) for production of RAC. Crushed granite was used as NCA, while crushed concrete rubble from a demolished concrete building was used as RCA. Two groups of concrete mixtures were tested: 100% NCA as control and 100% RCA. Bulk density and compressive strength tests of concrete cubes were conducted at 7, 14, 21, and 28 curing days respectively. The results showed that bulk density and compressive strength of natural aggregate concrete (NAC) were higher than those of RAC for different ages of concrete. The bulk density and compressive strength of the 28-day RAC were 2,328 kg/m3 and 29.42 N/mm2 respectively which satisfied British Standards Institution (1997) BS 8110-1:1997 requirements for structural concrete.","PeriodicalId":39035,"journal":{"name":"International Journal of Materials and Structural Integrity","volume":"130 1","pages":"123"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66768106","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: 9
Influence of particle arrangement on the stiffness and thermal expansion coefficient of aluminium-epoxy composites 颗粒排列对铝-环氧复合材料刚度和热膨胀系数的影响
International Journal of Materials and Structural Integrity Pub Date : 2016-01-01 DOI: 10.1504/IJMSI.2016.10003025
E. Sideridis, E. K. Ioakeimidis, V. Kytopoulos
{"title":"Influence of particle arrangement on the stiffness and thermal expansion coefficient of aluminium-epoxy composites","authors":"E. Sideridis, E. K. Ioakeimidis, V. Kytopoulos","doi":"10.1504/IJMSI.2016.10003025","DOIUrl":"https://doi.org/10.1504/IJMSI.2016.10003025","url":null,"abstract":"The stiffness and thermal expansion coefficient of periodic polymer composites containing identical spherical particles are studied using micromechanics principles. A cubic unit cell has been considered to predict thermomechanical properties of particulate polymeric composites. This model takes into account the influence of the distribution (arrangement) of spherical inclusions on the thermomechanical constants of the composite material consisting of matrix and filler. A composite model derived from the cubic and face-centred cubic model representing the basic cell of the composite at a microscopic scale was transformed into a five-phase spherical representative volume element (which will be referred henceforth as R.V.E.), in order to apply the classical theory of elasticity to it. Theoretical values arising from this proposed model were compared with experimental results carried out with epoxy resin composites filled with aluminium particles and also with those obtained from other theoretical formulas derived by other scientists.","PeriodicalId":39035,"journal":{"name":"International Journal of Materials and Structural Integrity","volume":"10 1","pages":"133"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66767802","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
A CAD/CAE integration method based on Excel 一种基于Excel的CAD/CAE集成方法
International Journal of Materials and Structural Integrity Pub Date : 2016-01-01 DOI: 10.1504/IJMSI.2016.10003021
Li Xiujuan, Fuyun Liu, Lu Han, L. Renshun, Kuan Li
{"title":"A CAD/CAE integration method based on Excel","authors":"Li Xiujuan, Fuyun Liu, Lu Han, L. Renshun, Kuan Li","doi":"10.1504/IJMSI.2016.10003021","DOIUrl":"https://doi.org/10.1504/IJMSI.2016.10003021","url":null,"abstract":"The parametric design technology, parametric CAE analysis technology and Excel unique functions were analysed, and a CAD/CAE integration method based on Excel was proposed. The proposed method can implement CAD/CAE integration automatically and efficiently. In the whole design analysis process, it needs no manual processing. As an example, an output shaft part was used to verify the accuracy and efficiency of the method. Results show that the proposed method has the characteristics of high universality and strong practicability. The proposed method will provide key technology support for us to realise product design efficiently, and to realise variant designs can satisfy engineering constraints.","PeriodicalId":39035,"journal":{"name":"International Journal of Materials and Structural Integrity","volume":"10 1","pages":"181"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66767695","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
Low-temperature fabrication of superhydrophobic surfaces with switchable adhesion property based on ZnO nanorod arrays 基于ZnO纳米棒阵列的具有可切换粘附特性的超疏水表面的低温制备
International Journal of Materials and Structural Integrity Pub Date : 2016-01-01 DOI: 10.1504/IJMSI.2016.10003024
Jiyuan Zhu, Xiaofang Hu, Yongli Li, J. Xiong
{"title":"Low-temperature fabrication of superhydrophobic surfaces with switchable adhesion property based on ZnO nanorod arrays","authors":"Jiyuan Zhu, Xiaofang Hu, Yongli Li, J. Xiong","doi":"10.1504/IJMSI.2016.10003024","DOIUrl":"https://doi.org/10.1504/IJMSI.2016.10003024","url":null,"abstract":"A facile route is reported in this paper to develop superhydrophobic surfaces with controllable water adhesion property based on ZnO nanostructure arrays on metal copper substrate. The rough structure was obtained at normal atmospheric pressure at 35°C. Modified by perfluorooctanoic acid (PFOA), the surfaces were endowed with good superhydrophobic property, showing a static contact angle of water ranging from 151.2° to 154.9° and rolling angle ranging from 5° to 88.5°. The surface adhesion could be adjusted within a wide range. The morphology and crystalline structures of ZnO nanorods were characterised by scanning electron microscopy (SEM), X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). The adhesion mechanism of the superhydrophobic surfaces is also discussed and the resulting surfaces are subject to several tests to prove the stability of the surfaces and the feasibility of the research method.","PeriodicalId":39035,"journal":{"name":"International Journal of Materials and Structural Integrity","volume":"10 1","pages":"157"},"PeriodicalIF":0.0,"publicationDate":"2016-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"66767761","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
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