Strain localization analyses of idealized sands in biaxial tests by distinct element method

作     者：Mingjing JIANG Hehua ZHU Xiumei LI 

作者机构：Department of Geotechnical Engineering and Key Laboratory of Geotechnical and Underground Engineering of Ministry of EducationTongji UniversityShanghai 200092China 

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2期

页      面：208-222页

学科分类：1305[艺术学-设计学（可授艺术学、工学学位）] 08[工学] 080502[工学-材料学] 0805[工学-材料科学与工程（可授工学、理学学位）] 0813[工学-建筑学] 0814[工学-土木工程] 

基　　金：This research was financially supported by the National Natural Science Foundation of China(Grant Nos.50679057 and 10972158) 

主　　题：idealized sand strain localization numerical analyses distinct element method(DEM) 

摘      要：This paper presents a numerical investigation on the strain localization of an idealized sand in biaxial compression tests using the distinct element method(DEM).In addition to the dilatancy and material frictional angle,the principal stress field,and distributions of void ratio,particle velocity,and the averaged pure rotation rate(APR)in the DEM specimen are examined to illustrate the link between microscopic and macroscopic variables in the case of strain *** study shows that strain localization of the granular material in the tests proceeds with localizations of void ratio,strain and APR,and distortions of stress field and force *** addition,both thickness and inclination of the shear band change with the increasing of axial swain,with the former valued around 10-14 times of mean grain diameter and the later overall described by the Mohr-Coulomb theory.