Rapid Generation of Particle Packs at High Packing Ratios for DEM Simulations of Granular Compacts

被引:13
|
作者
Campello, Eduardo M. B. [1 ]
Cassares, Kamila R. [1 ]
机构
[1] Univ Sao Paulo, Dept Struct & Geotech Engn, POB 61548, BR-05424970 Sao Paulo, SP, Brazil
来源
LATIN AMERICAN JOURNAL OF SOLIDS AND STRUCTURES | 2016年 / 13卷 / 01期
基金
巴西圣保罗研究基金会;
关键词
Particles; particle packing; granular materials; discrete element method; RANDOM CLOSE PACKING; DISCRETE; SPHERES;
D O I
10.1590/1679-78251694
中图分类号
TU [建筑科学];
学科分类号
0813 ;
摘要
In this work we present a simple, fast technique for generating particle packs at high packing ratios aiming at the simulation of granular compacts via the discrete element method (DEM). We start from a random sequence addition particle generation algorithm to generate a "layer" of non-overlapping spherical particles that are let to evolve dynamically in time under the action of "compacting" or "jamming" pseudo forces. A "layer-by-layer" approach is then followed to generate multiple layers on top of each other. In the end, very dense packs with pre-defined bulk shapes and sizes (e.g. rectangles in two dimensions and prisms in three dimensions) are achieved. The influence of rolling motion (with particle rotation and spin) along with inter-particle friction on the density and ordering of the generated packs is assessed. Both congruent and inhomogeneous packs (with respect to particle sizes) are created and their packing properties evaluated. We believe that simple techniques for fast generation of particle packs at high packing ratios are essential tools for the DEM simulation of granular compacts.
引用
收藏
页码:23 / 50
页数:28
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