Exploring the effects of particle shape and content of fines on the shear behavior of sand-fines mixtures via the DEM
Exploring the effects of particle shape and content of fines on the shear behavior of sand-fines mixtures via the DEM
复制标题
通过 DEM 探索颗粒形状和细粉含量对砂细粉混合物剪切行为的影响
DOI：
10.1016/j.compgeo.2018.10.021
复制
发表时间：
2019-02-01
影响因子：
5.3
通讯作者：
Wang, Xiang
中科院分区：
文献类型：
--
作者：
Gong, Jian;Nie, Zhihong;Wang, Xiang
本文采用二维离散元法研究了细粉颗粒形状和含量对砂-细粉混合物剪切特性的影响。不同的接触类型的剩余剪切强度的贡献进行了量化。每种接触类型的微观分析，包括协调数，法向接触力和它们的贡献的主应力分量，揭示了为什么每种接触类型的残余剪切强度的贡献是不同的。最后，各向异性分析使我们能够理解导致残余剪切强度依赖于颗粒形状和细粉含量的微观机制。
This report explores the effects of particle shape and content of fines on the shear behavior of sand-fines mixtures using a two-dimensional discrete element method. The contributions of different contact types to the residual shear strength are quantified. Microscopic analysis of each contact type, including coordination number, normal contact force and their contributions to the principal stress components, reveals why the contribution of each contact type to the residual shear strength is varied. Finally, anisotropic analysis enables us to understand the microscopic mechanisms that cause the residual shear strength to be dependent on the particle shape and content of fines.