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Viscoelastic Behavior of Granite and the Homogenization Analysis 花岗岩粘弹性特性及均匀化分析
Materials Science Research International Pub Date : 2000-09-15 DOI: 10.2472/JSMS.49.9APPENDIX_203
Y. Seo, N. Fujii, T. Seiki, Y. Ichikawa
{"title":"Viscoelastic Behavior of Granite and the Homogenization Analysis","authors":"Y. Seo, N. Fujii, T. Seiki, Y. Ichikawa","doi":"10.2472/JSMS.49.9APPENDIX_203","DOIUrl":"https://doi.org/10.2472/JSMS.49.9APPENDIX_203","url":null,"abstract":"Granite is a composite material of rock-forming minerals with discontinuous joints such as grain boundaries and microcracks. Studies of these microstructures are of increasing interest in geophysics and geotechnical engineering relating to underground space development. We first performed uniaxial compressive and relaxation tests for estimating physical properties of discontinuous joints by using three kinds of rocks that consist of quartz, quartz/feldspar and feldspar, respectively. Next a homogenization method is applied to analyze a viscoelastic behavior of granite including these joints.","PeriodicalId":377759,"journal":{"name":"Materials Science Research International","volume":"36 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127419812","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: 2
Inverse Analysis Procedure for Identifying Material Parameters of Hypoplastic Constitutive Model for Soils 土的欠塑性本构模型材料参数反演分析方法
Materials Science Research International Pub Date : 2000-09-01 DOI: 10.2472/JSMS.49.9APPENDIX_212
P. Dziadziuszko, Y. Ichikawa, Z. Sikora
{"title":"Inverse Analysis Procedure for Identifying Material Parameters of Hypoplastic Constitutive Model for Soils","authors":"P. Dziadziuszko, Y. Ichikawa, Z. Sikora","doi":"10.2472/JSMS.49.9APPENDIX_212","DOIUrl":"https://doi.org/10.2472/JSMS.49.9APPENDIX_212","url":null,"abstract":"In this paper we present an inverse analysis method for material parameter identification applied to the hypoplastic constitutive model for soils. The proposed method is classified as a direct-approach one, since the discrepancy between the material responses, measured and calculated by means of the finite element method is directly minimized. In the presented work this minimization is made up of the modified Levenberg-Marquardt optimization method based on the so-called trust region approach. We provide a numerical example of parameter identification for a triaxial test performed on a sand material, supplemented by the analysis of the influence of the initial guesses of the parameters to be identified, as well as the errors in the measured control data on the identification process.","PeriodicalId":377759,"journal":{"name":"Materials Science Research International","volume":"38 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-09-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"129100575","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
Effect of Rubber Particle Size and Graft Ratio on the Morphology and Tensile Properties of ABS Resins 橡胶粒径和接枝率对ABS树脂形貌和拉伸性能的影响
Materials Science Research International Pub Date : 2000-06-15 DOI: 10.2472/JSMS.49.6APPENDIX_104
H. Yamane, Z. Maekawa, Hajime Sakano
{"title":"Effect of Rubber Particle Size and Graft Ratio on the Morphology and Tensile Properties of ABS Resins","authors":"H. Yamane, Z. Maekawa, Hajime Sakano","doi":"10.2472/JSMS.49.6APPENDIX_104","DOIUrl":"https://doi.org/10.2472/JSMS.49.6APPENDIX_104","url":null,"abstract":"Tensile properties and the phase morphologies of ABS resins with various rubber particle sizes and graft ratios of SAN are examined. Large rubber particles disperse well in ABS resins irrespective of the graft ratio. On the other hand, the graft ratio affects the dispersion state of the small rubber particle, particles with high graft ratio disperse well and those with low graft ratio tend to coalesce into large aggregates. These differences of the morphology strongly alter the deformation mechanism, such as craze formation and cavitation in the rubber particles. The effects of mixing of ABS resins with various graft ratio and particle size on the mechanical properties and phase morphology are also discussed.","PeriodicalId":377759,"journal":{"name":"Materials Science Research International","volume":"49 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-06-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130264584","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: 2
Vital problems of nanocomposite structure and possibilities of their modular design 纳米复合材料结构的关键问题及其模块化设计的可能性
Materials Science Research International Pub Date : 2000-03-15 DOI: 10.2472/JSMS.49.3APPENDIX_22
P. An, N. A. Bulienkov
{"title":"Vital problems of nanocomposite structure and possibilities of their modular design","authors":"P. An, N. A. Bulienkov","doi":"10.2472/JSMS.49.3APPENDIX_22","DOIUrl":"https://doi.org/10.2472/JSMS.49.3APPENDIX_22","url":null,"abstract":"A general approach to the study of the structure of all known forms of the solid state and of biological structures is possible on the basis of the concept module that is more general and unambiguous than the lattice . The potentialities of modular design for the deliberate selection of structural components and the estimation of the opportunities of their self-organization due to formation of perfect coherent boundaries between their regularly oriented crystallites in nanocomposites were shown by the examples of two-dimensional Penrose mosaics and three-dimensional biomimetic composite amorphous-Al 2 O 3 - hydroxyapatite - collagen - bound water.","PeriodicalId":377759,"journal":{"name":"Materials Science Research International","volume":"97 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2000-03-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"127096794","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
CONNECTING MOLECULAR DYNAMICS AND DISLOCATION DYNAMICS TO CONTINUUM IN HIERARCHICAL SIMULATIONS OF MICROCRACKS IN SOLIDS(Special Issue on Hierarchical Estimations of Materials Strength) 结合分子动力学和位错动力学在固体微裂纹分层模拟中的连续统(材料强度分层估计专刊)
Materials Science Research International Pub Date : 1999-12-15 DOI: 10.2472/JSMS.48.12APPENDIX_241
A. Nakatani, H. Kitagawa, S. Yip
{"title":"CONNECTING MOLECULAR DYNAMICS AND DISLOCATION DYNAMICS TO CONTINUUM IN HIERARCHICAL SIMULATIONS OF MICROCRACKS IN SOLIDS(Special Issue on Hierarchical Estimations of Materials Strength)","authors":"A. Nakatani, H. Kitagawa, S. Yip","doi":"10.2472/JSMS.48.12APPENDIX_241","DOIUrl":"https://doi.org/10.2472/JSMS.48.12APPENDIX_241","url":null,"abstract":"Multiscale approach to crack tip plasticity involves length scales from electronic structure to the continuum, as well as deformation behavior from single dislocation nucleation to plastic-zone shielding. A current challenge is to connect the different levels and methods of simulation in order to study ductile fracture in a more holistic fashion, a goal that cannot be accomplished through any one single simulation. We present two specific examples of potentially useful connections, (1) using molecular dynamics to determine a stress-displacement relation for direct use in continuum-level analysis, and (2) a comparative study of dislocation microstructure evolution by discrete dislocation dynamics and finite-element method. Applications to understanding brittle-ductile behavior in an important metal, α-Fe, are particularly emphasized.","PeriodicalId":377759,"journal":{"name":"Materials Science Research International","volume":"18 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123314607","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
DEFORMATION ANALYSIS OF LASER PROCESSED GRAIN ORIENTED SILICON STEEL SHEET USING MOIRE INTERFEROMETRY(Special Issue on Hierarchical Estimations of Materials Strength) 激光加工晶粒取向硅钢片的莫尔干涉变形分析(材料强度层次估计专刊)
Materials Science Research International Pub Date : 1999-12-15 DOI: 10.2472/JSMS.48.12APPENDIX_291
H. Xie, S. Kishimoto, Jindong Li, D. Zou, F. Dai, N. Shinya
{"title":"DEFORMATION ANALYSIS OF LASER PROCESSED GRAIN ORIENTED SILICON STEEL SHEET USING MOIRE INTERFEROMETRY(Special Issue on Hierarchical Estimations of Materials Strength)","authors":"H. Xie, S. Kishimoto, Jindong Li, D. Zou, F. Dai, N. Shinya","doi":"10.2472/JSMS.48.12APPENDIX_291","DOIUrl":"https://doi.org/10.2472/JSMS.48.12APPENDIX_291","url":null,"abstract":"In this study, the residual deformation of silicon steel sheets with lowered core loss by strong power laser was investigated in combination of two deposited metal layers grating for high temperature with laser moire interferometry method. The silicon steel sheet was processed with different processing parameters under a CO2 and a YAG laser, respectively. The distributions of residual deformation in x and y axes were obtained. The experimental results showed that the silicon steel sheet was under the state of compressive residual strain, and were analyzed in detail.","PeriodicalId":377759,"journal":{"name":"Materials Science Research International","volume":"126 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"114824485","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: 2
ATOMIC-LEVEL DESCRIPTION OF MATERIAL STRENGTH OF α-Fe(Special Issue on Hierarchical Estimations of Materials Strength) α-Fe材料强度的原子水平描述(材料强度的层次估计专刊)
Materials Science Research International Pub Date : 1999-12-15 DOI: 10.2472/JSMS.48.12APPENDIX_225
Y. Shibutani, G. Krasko, M. Šob, S. Yip
{"title":"ATOMIC-LEVEL DESCRIPTION OF MATERIAL STRENGTH OF α-Fe(Special Issue on Hierarchical Estimations of Materials Strength)","authors":"Y. Shibutani, G. Krasko, M. Šob, S. Yip","doi":"10.2472/JSMS.48.12APPENDIX_225","DOIUrl":"https://doi.org/10.2472/JSMS.48.12APPENDIX_225","url":null,"abstract":"Considering the current developments in multiscale materials modeling and longstanding interest in the mechanical behavior in Fe, we propose a new atomistic description of α-Fe which is an improvement over existing models that do not consider explicitly the magnetic interactions. The proposal is to combine a many-body potential fitted to a database of ab-initio electronic structure calculations with a Stoner model treatment of itinerant ferromagnetism. Using selected results on deformation behavior from the literature, we illustrate the kind of material strength studies that can benefit from the new description, as well as other significant applications which are beyond the capabilities of first-principles approach.","PeriodicalId":377759,"journal":{"name":"Materials Science Research International","volume":"9 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"115865522","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
COOPERATIVE DISLOCATION GENERATION AT FINITE TEMPERATURES IN LOADED SOLIDS : Transition from Brittle to Ductile Regime(Special Issue on Hierarchical Estimations of Materials Strength) 加载固体有限温度下协同位错的产生:从脆性到延性的转变(材料强度等级估计专刊)
Materials Science Research International Pub Date : 1999-12-15 DOI: 10.2472/JSMS.48.12APPENDIX_234
M. Khantha, M. Ling, V. Vítek
{"title":"COOPERATIVE DISLOCATION GENERATION AT FINITE TEMPERATURES IN LOADED SOLIDS : Transition from Brittle to Ductile Regime(Special Issue on Hierarchical Estimations of Materials Strength)","authors":"M. Khantha, M. Ling, V. Vítek","doi":"10.2472/JSMS.48.12APPENDIX_234","DOIUrl":"https://doi.org/10.2472/JSMS.48.12APPENDIX_234","url":null,"abstract":"This paper describes a theoretical model and a Monte Carlo simulation of cooperative dislocation generation in loaded crystals at finite temperatures. The theoretical work, employing a mean-field approach, is presented for the three-dimensional case when dislocation loops are formed. It describes how extensive plasticity can be initiated in dislocation-free crystals above a critical temperature due to 'homogeneous' cooperative nucleation and expansion of many dislocation loops. The Monte Carlo simulation is carried out to demonstrate the feasibility of the theoretical model. It is performed for a two dimensional case when dislocation dipoles are formed on an underlying lattice under applied loads. The application of this model to the brittle-to-ductile transition and the yielding of whiskers is discussed.","PeriodicalId":377759,"journal":{"name":"Materials Science Research International","volume":"65 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"123377208","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
CHARACTERIZATION OF INTEGRATED DATA ON INHERENT FLAWS IN ENGINEERING CERAMICS(Special Issue on Hierarchical Estimations of Materials Strength) 工程陶瓷固有缺陷的综合数据表征(材料强度层次估计专刊)
Materials Science Research International Pub Date : 1999-12-15 DOI: 10.2472/JSMS.48.12APPENDIX_285
T. Hoshide, Hidehiko Hiramatsu
{"title":"CHARACTERIZATION OF INTEGRATED DATA ON INHERENT FLAWS IN ENGINEERING CERAMICS(Special Issue on Hierarchical Estimations of Materials Strength)","authors":"T. Hoshide, Hidehiko Hiramatsu","doi":"10.2472/JSMS.48.12APPENDIX_285","DOIUrl":"https://doi.org/10.2472/JSMS.48.12APPENDIX_285","url":null,"abstract":"Integrated data on inherent flaws in engineering ceramics were characterized for quantitative analyses of them. For this purpose, a ceramic strength database utilized on a personal computer was temporarily constructed so that collected data on flaws could be compiled as records in the database. It was clarified that distributions of the equivalent crack length l for several ceramics were nearly fitted to normal distribution functions. The distribution of l was investigated for every type of flaw, and it was found to shift toward a longer length region in the order of embedded, surface, and corner flaws. The flaw data were also correlated with strength and microstructural parameters. In the relation to the strength, the strength was reduced as a whole with the decrease in the crack length, while the lower bound of strength scatter was predicted by a modified relation of the fracture mechanics criterion for long cracks. It was revealed that the flaw size increased with the increase in the grain size or the porosity. The relation of a Petch-Hall type was observed between the grain size and the mean strength estimated by using the mean value of l. Some useful suggestions were offered for the improvement of ceramic strength.","PeriodicalId":377759,"journal":{"name":"Materials Science Research International","volume":"5 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"130271408","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: 2
MESOSCOPIC DYNAMICS ON DISLOCATION PATTERNING IN FATIGUED MATERIAL BY CELLULAR AUTOMATA(Special Issue on Hierarchical Estimations of Materials Strength) 基于元胞自动机的疲劳材料位错模式的介观动力学(材料强度层次估计专刊)
Materials Science Research International Pub Date : 1999-12-15 DOI: 10.2472/JSMS.48.12APPENDIX_258
Y. Shibutani
{"title":"MESOSCOPIC DYNAMICS ON DISLOCATION PATTERNING IN FATIGUED MATERIAL BY CELLULAR AUTOMATA(Special Issue on Hierarchical Estimations of Materials Strength)","authors":"Y. Shibutani","doi":"10.2472/JSMS.48.12APPENDIX_258","DOIUrl":"https://doi.org/10.2472/JSMS.48.12APPENDIX_258","url":null,"abstract":"A typical pattern formation of collective dislocations under cyclic loading, the persistent slip bands (PSBs), is simulated by the cellular automata (CA) method. The local rule of CA taken in the present paper is the weighted addition modulo two rule. Each weight is chosen referring to the reaction-diffusion coupled differential equations with respect to immobile and mobile dislocation densities. The mesoscopic evolution of the immobile dislocation density is driven by the space-oriented bifurcation (Turing instability) and results in the ladder-type self-organization. Instability related to the space- and the time-oriented bifurcations is in detail discussed in a one-dimensional model. A stress amplitude-like parameter and two diffusion coefficients of the immobile and mobile dislocation densities highly affect the sequential evolution process. Finally, a two-dimensional hexagonal cell model representing a {111} glide plane of the fcc crystal is proposed. The same local rule is applied along the three preferential sliding directions for easy description of mutual interaction between cells. The evolution yields a localized isotropic and a one-directional anisotropic flow patterns of dislocation densities according to the combination of the three diffusion coefficients.","PeriodicalId":377759,"journal":{"name":"Materials Science Research International","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"1999-12-15","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"121740903","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: 5
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