考虑破碎影响的颗粒材料亚塑性模型及应变局部化模拟  

A hypoplastic model and numerical modeling of strain localization of granular materials exhibiting particle crushing

作　　者：楚锡华[1,2] 沈顺[1] 余村[1] 姜清辉[1] 

机构地区：[1]武汉大学土木建筑工程学院,武汉430072 [2]水资源与水电工程科学国家重点实验室,武汉430072

出　　处：《计算力学学报》2012年第3期375-380,共6页Chinese Journal of Computational Mechanics

基　　金：国家自然科学基金(10802060);国家自然科学基金(11172216)资助项目;国家重点基础研究发展计划(2010CB732005;2010CB731502)

摘　　要：在基于2ndP-K应力率的亚塑性模型基础上,通过引入一个能够考虑颗粒破碎影响的孔隙比-平均压力临界状态方程,形成了一个能够模拟颗粒破碎影响的颗粒材料亚塑性模型,数值算例考查了颗粒破碎对应变局部化模式及位移-承载曲线的影响,结果表明,所建议模型具有模拟破碎对颗粒材料应变局部影响的良好性能。Based on the hypoplastic model with 2na P-K stress rate,a hypoplastic model for granular mate- rials exhibiting particle crushing is presented by adopting an experiential curve between void and a wide range of mean effective pressure, including those sufficient to cause particle crushing. The modes of strain localization and loading carry capability of granular materials are investigated under two cases, （1） considering particle crushing （2） without considering particle crushing; numerical results illustrate the capability and performance of presented model in modeling the effects of particle crushing on deformation of granular materials.

关 键 词：颗粒材料 亚塑性模型 颗粒破碎 应变局部化 

分 类 号：O344.3[理学—固体力学] TU43[理学—力学]