计算力学学报2011，Vol.28Issue(5)：682-687,6.
基于细观方向平均模型的颗粒材料宏观Cosserat连续体本构关系
The micro-directional model of Cosserat continuum description for granular materials
摘要
Abstract
This paper develops the micro-directional model of Cosserat continuum, taking into account the particle rotation and contact couples on the micro level. The effects of micro structures on macro behavior are embodied with the contact distribution function. The specific formulae of macro elastic constants under homogeneous and isotropic assumption are derived. Micro-mechanically-based expressions of the intrinsic length scale are also suggested for two-dimensional case. The validity of the proposed model is verified through the comparisons of theoretical predictions from the developed model and numerical simulation by using discrete element method on overall behavior of a granular assembly with regular arrangement.关键词
颗粒材料/Cosserat连续体/离散颗粒集合体/微-方向模型/离散单元法Key words
granular materials/cosserat continuum/discrete particle assembly/micro-directional model discrete element method分类
建筑与水利引用本文复制引用
刘其鹏,李锡夔,楚锡华..基于细观方向平均模型的颗粒材料宏观Cosserat连续体本构关系[J].计算力学学报,2011,28(5):682-687,6.基金项目
国家自然科学基金 （）
国家重点基础研究发展计划（2010CB731502）资助项目. （）
