Confined granular packings: Structure, stress, and forces

被引:140
作者
Landry, JW
Grest, GS
Silbert, LE
Plimpton, SJ
机构
[1] Sandia Natl Labs, Albuquerque, NM 87185 USA
[2] Univ Chicago, James Franck Inst, Chicago, IL 60637 USA
来源
PHYSICAL REVIEW E | 2003年 / 67卷 / 04期
关键词
D O I
10.1103/PhysRevE.67.041303
中图分类号
O35 [流体力学]; O53 [等离子体物理学];
学科分类号
070204 ; 080103 ; 080704 ;
摘要
The structure and stresses of static granular packs in cylindrical containers are studied by using large-scale discrete element molecular dynamics simulations in three dimensions. We generate packings by both pouring and sedimentation and examine how the final state depends on the method of construction. The vertical stress becomes depth independent for deep piles and we compare these stress depth profiles to the classical Janssen theory. The majority of the tangential forces for particle-wall contacts are found to be close to the Coulomb failure criterion, in agreement with the theory of Janssen, while particle-particle contacts in the bulk are far from the Coulomb criterion. In addition, we show that a linear hydrostaticlike region at the top of the packings unexplained by the Janssen theory arises because most of the particle-wall tangential forces in this region are far from the Coulomb yield criterion. The distributions of particle-particle and particle-wall contact forces P(f) exhibit exponential-like decay at large forces in agreement with previous studies.
引用
收藏
页码:9 / 413039
页数:9
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