Microscopic study on stress-strain relation of granular materials  

作　　者：LIU SiHong YAO YangPing SUN QiCheng LI TieJun LIU MinZhi 

机构地区：[1]State Key Laboratory of Hydrology-Water Resources and Hydraulic Engineering, Hohai University, Nanjing 210098, China [2]Department of Civil Engineering, Beihang University, Beijing 100191, China [3]State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China

出　　处：《Chinese Science Bulletin》2009年第23期4349-4357,共9页

基　　金：Supported by the National Natural Science Foundation of China (Grant Nos. 10672050, 10872016)

摘　　要：A biaxial shearing test on granular materials is numerically simulated by distinct element method (DEM). The evolution of the microstructures of granular materials during isotropic compression and shearing is investigated, on which a yield function is derived. The new yield function has a similar form as the one used in the modified Cam-clay model and explains the yield characteristics of granular materials under the isotropic compression and shear process through the change of the contact distribution N(θ) defining the contacts at particle contact angle θ.A biaxial shearing test on granular materials is numerically simulated by distinct element method （DEM）. The evolution of the microstructures of granular materials during isotropic compression and shearing is investigated, on which a yield function is derived. The new yield function has a similar form as the one used in the modified Cam-clay model and explains the yield characteristics of granular materials under the isotropic compression and shear process through the change of the contact distribution N（θ） defining the contacts at particle contact angle θ.

关 键 词：微观结构 应力应变关系 颗粒物质 颗粒材料 各向同性 剪切过程 离散单元法 产量性状 

分 类 号：TU452[建筑科学—岩土工程] O424[建筑科学—土工工程]