A novel non-overlapping approach to accurately represent 2D arbitrary particles for DEM modelling

作     者：张强 徐卫亚 刘沁雅 王伟 孟庆祥 ZHANG Qiang;XU Wei-ya;LIU Qin-ya;WANG Wei;MENG Qing-xiang

作者机构：Key Laboratory of Ministry of Education for Geomechanics and Embankment EngineeringHohai UniversityNanjing 210098China Research Institute of Geotechnical EngineeringHohai UniversityNanjing 210098China Department of PhysicsUniversity of TorontoTorontoM5S 1A7Canada Department of Civil&Environmental EngineeringUniversity of WaterlooWaterlooN2L 3G1Canada 

出 版 物：《Journal of Central South University》 (中南大学学报（英文版）)

年 卷 期：2017年第24卷第1期

页      面：190-202页

核心收录：

学科分类：0810[工学-信息与通信工程] 0806[工学-冶金工程] 08[工学] 0805[工学-材料科学与工程（可授工学、理学学位）] 080502[工学-材料学] 0703[理学-化学] 0812[工学-计算机科学与技术（可授工学、理学学位）] 

基　　金：Project(2011CB013504)supported by the National Basic Research Program(973 Program)of China Project(2013BAB06B01)supported by Key Projects in the National Science&Technology Pillar Program during the Twelfth Five-year Plan Period,China Projects(51309089,51479049)supported by National Natural Science Foundation of China Project(487237)supported by Natural Sciences and Engineering Research Council of Canada 

主　　题：discrete element method (DEM) composite approaches arbitrary particles clusters non-overlapping disks 

摘      要：Mechanical behaviors of granular materials are complicated and greatly influenced by the particle ***,some composite approaches have been proposed for realistic particle shape modelling within discrete element method(DEM),while they cannot give a good representation to the shape and mass properties of a real *** this work,a novel algorithm is developed to model an arbitrary particle using a cluster of non-overlapping *** algorithm mainly consists of two components:boundary filling and domain *** the boundary filling,some disks are placed along the boundary for a precise representation of the particle shape,and some more disks are placed in the domain to give an approximation to the mass properties of the particle in the domain ***,a simple method is proposed to correct the mass properties of a cluster after domain filling and reduce the number of the disks in a cluster for lower computational ***,it is another great merit of the algorithm that a cluster generated by the algorithm can be used to simulate the particle breakage because of no overlaps between the disks in a ***,several examples are used to show the robust performance of the algorithm.A current FORTRAN version of the algorithm is available by contacting the author.