Numerical simulation study on particle breakage behavior of granular materials in confined compression tests

作     者：Yang Yu Guangsi Zhao Minghui Ren Yang Yu;Guangsi Zhao;Minghui Ren

作者机构：State Key Laboratory for Geomechanics and Deep Underground EngineeringSchool of Mechanics and Civil EngineeringChina University of Mining and TechnologyXuzhou221116China 

出 版 物：《Particuology》 (颗粒学报（英文版）)

年 卷 期：2023年第74卷第3期

页      面：18-34页

核心收录：

学科分类：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）] 

基　　金：supported by the National Natural Science Foundations of China (grant Nos.41672343 and 41772338) 

主　　题：Granular materials Confined compression Particle breakage Meso-mechanics Discrete element method 

摘      要：In order to study the fragmentation law,the confined compression experiment of granular assemblies has been conducted to explore the particle breakage characteristic by DEM approach in this *** is shown that contact and contact force during the loading process gradually transform from anisotropy to ***,two particle failure modes caused by different contact force states are analyzed,which are single-through-crack failure and multi-short-crack *** the vertical distribution of the number of cracks and the four characteristic stress distributions(the stress related to the maximum contact force,the major principal stress,the deviatoric stress and the mean stress),it is pointed out that the stress based on the maximum contact force and the major principal stress can reflect the distribution of cracks *** addition,the size effect of particle crushing indicates that small size particles are prone to *** lateral pressure coefficient of four size particles during the loading process is analyzed to explain the reason for the size effect of particle breakage.