点缺陷对二维颗粒系统力链几何分布的影响  

Geometric distribution of the force chains in the two-dimension granular system with point defects

作　　者：宜晨虹[1] 蒋庆宇[1] 慕青松[2] 苗天德[2] 

机构地区：[1]中国工程物理研究院流体物理研究所冲击波物理与爆轰物理实验室,四川绵阳621900 [2]兰州大学土木工程与力学学院,兰州730000

出　　处：《兰州大学学报（自然科学版）》2009年第6期101-103,110,共4页Journal of Lanzhou University(Natural Sciences)

基　　金：国家自然科学基金项目(10172041);国家自然科学青年基金项目(10402012)

摘　　要：用离散元方法研究了带有不同数目点缺陷的二维颗粒系统在各向同性挤压和纯剪切时粒子间力链的几何分布特征,并与相同加载条件下无缺陷的颗粒系统力链几何分布特征做了比较,发现了点缺陷对颗粒系统力链的几何分布影响规律.The discrete element method was used to study the force distribution of a two-dimension granular system under the condition of isotropic press and pure shear. Then the force chains＇ distribution of two-dimension granular system with point defects was simulated under the condition of isotropic press and pure shear the results were compared without point defects. The affects of point defects to geometric distribution of the force chains in the two-dimension granular system were found.

关 键 词：颗粒系统 离散元方法 点缺陷 力链 

分 类 号：O347.7[理学—固体力学]