铁道科学与工程学报Issue(4)：58-62,5.
基于离散元理论的粗粒土三轴试验细观模拟
Meso-mechanical si mulation study on triaxial test of coarse-grained soil based on DEM
摘要
Abstract
A simulation model of bonded material was established based on the theory of particle flow code in 3D (PFC3D).The cohesion force of particles was taken into account when determining the constitutive relations of particles.The PFC model was demarcated according to the results of the triaxial tests and massive numerical tests, which demonstrated the laboratory test accurately.Research on different stress paths was carried out on the basis of the demarcated model.The effect of friction coefficient,bond strength and porosity on the microscopic mechanical characteristics was investigated through further analysis of microscopic parameters,which reveals the mutual-rela-tionship between the two.In addition,the research results show that the response of microscopic mechanical char-acteristics can be adjusted by controlling the value of meso-structure parameters,and therefore certain suggestions were made on the selection of microscopic parameters,which would provide reference for the PFC test in future.关键词
离散元理论/颗粒流/三轴试验/细观参数/应力路径Key words
discrete element method/particle flow code/triaxial test/microscopic parameters/stress path分类
建筑与水利引用本文复制引用
刘勇,朱俊朴,闫斌..基于离散元理论的粗粒土三轴试验细观模拟[J].铁道科学与工程学报,2014,(4):58-62,5.基金项目
国家自然科学基金资助项目（51378503）；高速铁路基础研究联合基金资助项目 （）
