Visualization of force networks in 2D dense granular materials

作     者：Jianguo LIU Qicheng SUN Feng JIN 

作者机构：State Key Laboratory of Hydroscience and EngineeringDepartment of Hydraulic EngineeringTsinghua UniversityBeijing 100084China 

出 版 物：《Frontiers of Structural and Civil Engineering》 (结构与土木工程前沿（英文版）)

年 卷 期：2010年第4卷第1期

页      面：109-115页

学科分类：1305[艺术学-设计学（可授艺术学、工学学位）] 08[工学] 0813[工学-建筑学] 0814[工学-土木工程] 080102[工学-固体力学] 0801[工学-力学（可授工学、理学学位）] 

基　　金：The authors acknowledge the support of the National Key Basic Research Program of China(Nos.2007CB714101,2010CB731504) the research funding from the State Key Laboratory of Hydroscience and Engineering,Tsinghua University(No.2008-ZY-6) 

主　　题：granular matter force chain multiscale modeling 

摘      要：Dense granular matter is a conglomeration of discrete solid and closely packed *** subjected to external loadings,the stress is largely transmitted by heavily stressed chains of particles forming a sparse network of larger contact *** understand the structure and evolution of force chains,a photoelastic technique was improved for determining stresses and strains in the assemblies of photoelastic granular disks in this paper.A two-dimensional vertical slab was *** contains 7200 polydispersed photoelastic disks and is subjected to a localized probe penetrating at the top of the slab to mimic the cone penetration *** interparticle contact force distribution was found a peak around the mean value,a roughly exponential tail for greater force and a dip toward zero for smaller *** force chain network around the probe tip was depicted,and the contact angle distribution of particles in force chains was found to be well aligned in the directions of major principal stress.