Scaling granular material with polygonal particles in discrete element modeling  

作　　者：Alireza Ahmadi Stefan Larsson Carl Wersall 

机构地区：[1]KTH Royal Institute of Technology,Division of Soil and Rock Mechanics,Brinellvagen 23,10044,Stockholm,Sweden

出　　处：《Particuology》2023年第4期151-164,共14页颗粒学报（英文版）

摘　　要：Despite advancements in computational resources,the discrete element method(DEM)still requires considerable computational time to solve detailed problems,especially when it comes to the large-scale models.In addition to the geometry scale of the problem,the particle shape has a dramatic effect on the computational cost of DEM.Therefore,many studies have been performed with simplified spherical particles or clumps.Particle scaling is an approach to increase the particle size to reduce the number of particles in the DEM.Although several particle scaling methods have been introduced,there are still some disagreements regarding their applicability to certain aspects of problems.In this study,the effect of particle scalping on the shear behavior of granular material is explored.Real granular particles were scanned and imported as polygonal particles in the direct shear test.The effect of particle size distri-bution,particle angularity,and the amount of scalping were investigated.The results show that particle scalping can simulate the correct shear behavior of the model with significant improvement in computational time.Also,the accuracy of the scalping method depends on the particle angularity and particle size range.

关 键 词：Particle scaling Direct shear test Discrete element method PFC Polygonal shape Granular material 

分 类 号：TB34[一般工业技术—材料科学与工程]