| 断裂力学及边界元法在有限体应变局部化问题中的应用 |
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| 引用本文： | 师自海,堀井秀之. 断裂力学及边界元法在有限体应变局部化问题中的应用[J]. 力学学报, 1992, 24(1): 71-81. DOI: 10.6052/0459-1879-1992-1-1995-713 |
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| 作者姓名： | 师自海 堀井秀之 |
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| 作者单位： | 中国科学院力学研究所 |
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| 摘 要： | 微裂纹模型是研究砂土变形中应变局部化问题的微观力学模型。本文在前文的基础上建立了有限平面的徽裂纹模型的基本方程。数值解析表明,微裂纹模型可再现应变局部化及应变软化现象。同时,本文简要地讨论了边界约束、尺寸效应及侧压对应变局部化的影响。
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| 关 键 词： | 应变局部化 断裂力学 边界元法 |
APPLICATION OF FRACTURE MECHANICS AND BEM TO STRAIN LOCALIZATION PROBLEMS IN A FINITE BODY |
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| Shi Zihai. APPLICATION OF FRACTURE MECHANICS AND BEM TO STRAIN LOCALIZATION PROBLEMS IN A FINITE BODY[J]. chinese journal of theoretical and applied mechanics, 1992, 24(1): 71-81. DOI: 10.6052/0459-1879-1992-1-1995-713 |
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| Authors: | Shi Zihai |
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| Abstract: | The microslip model is a new approach to the mechanism of strain localization in sand deformation. As an extension of the previous study [Mechanics of Materials 8 (1989)89-102] , the paper presents a mathematical formulation of the microslip model with boundary constraints, based on the method of pseudo-tractions and the boundary element methol. Special attention is given to the effect of boundaries on strain localization. Some interesting aspects of the problem, such as the dependence of the deformation characteristics on sample size and confining pressure, as well as the strain softening phenomenon, are also discussed. |
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| Keywords: | strain localization strain softening microslip local dilatanr.y boundary effect |
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