Review of particle breakage simulation based on DEM
XU Kun1, 2, ZHOU Wei1, 2, MA Gang1, 2, CHANG Xiao-lin1, 2, YANG Li-fu1, 2
1. State Key Laboratory of Water Resources and Hydropower Engineering Science, Wuhan University, Wuhan 430072, China; 2. Key Laboratory of Rock Mechanics in Hydraulic Structural Engineering, Wuhan University, Ministry of Education, Wuhan 430072, China
Abstract：Particle breakage has a significant effect on the macro- and micro-mechanical behaviors of granular assemblies. The development of micro-scale researches on particle breakage based on physical experiments is limited by the current experimental techniques. An efficient way is provided to investigate the effect of particle breakage on the behavior of granular assemblies from different scales with the proposed discrete element method (DEM). The worldwide researches are reviewed, and two kinds of particle breakage simulation methods based on DEM are introduced, namely the particle breakage simulation methods based on the bonded-particle model (BPM) and based on the fragment replacement method (FRM). The distinct problems for the particle breakage simulation method based on BPM are that it is not suitable for a large-scale numerical simulation and has a limited breakage level. Two key points, the fragment replacement mode and the particle breakage criterion, should be considered when using the particle breakage simulation method based on FRM. The fragment number, size distribution and law of mass conservation strategies of fragment replacement mode are discussed as well as the stress criterion and force criterion for particle breakage. The possible research emphasis in the field of particle breakage simulation method based on DEM is proposed.
徐琨, 周伟, 马刚, 常晓林, 杨利福. 基于离散元法的颗粒破碎模拟研究进展[J]. 岩土工程学报, 2018, 40(5): 880-889.
XU Kun, ZHOU Wei, MA Gang, CHANG Xiao-lin, YANG Li-fu. Review of particle breakage simulation based on DEM. Chinese J. Geot. Eng., 2018, 40(5): 880-889.
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