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。
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.
出处
《力学学报》
EI
CSCD
北大核心
1992年第1期71-81,共11页
Chinese Journal of Theoretical and Applied Mechanics
关键词
应变局部化
断裂力学
边界元法
strain localization, strain softening, microslip, local dilatanr.y, boundary effect
