Exploring the effects of particle shape and content of fines on the shear behavior of sand-fines mixtures via the DEM

被引：190
作者：
Gong, Jian [1 ]
Nie, Zhihong [1 ]
Zhu, Yangui [1 ]
Liang, Zhengyu [1 ]
Wang, Xiang [1 ]
机构：
[1] Cent S Univ, Sch Civil Engn, Changsha 410075, Hunan, Peoples R China
来源：
COMPUTERS AND GEOTECHNICS | 2019年 / 106卷
基金：
中国国家自然科学基金; 芬兰科学院;
关键词：
Sand-fines mixtures; Residual shear strength; Particle shape; Fines content; Contact type; Anisotropy; STATIC LIQUEFACTION; VOID RATIOS; STRENGTH; STIFFNESS; SIZE; TRANSMISSION; ASSEMBLIES; DILATANCY;
D O I：
10.1016/j.compgeo.2018.10.021
中图分类号：
TP39 [计算机的应用];
学科分类号：
081203 ; 0835 ;
摘要：
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.
引用
收藏
页码：161 / 176
页数：16
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