Particle shape consideration in numerical simulation of assemblies of irregularly shaped particles

The mechanical behavior of granular materials depends much on the shape of the constituent particles. Therefore appropriate modeling of particle, or grain, shape is quite important. This study employed the method of direct modeling of grain shape （Matsushima ＆ Saomto, 2002）, in which, the real shape...

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Bibliographic Details
Published in:Particuology 2011-08, Vol.9 (4), p.387-397
Main Authors: Abedi, Saba, Mirghasemi, Ali Asghar
Format: Article
Language:English
Subjects:
Angularity
Assemblies
Computer simulation
Confining pressure
Discrete element method
Grains
Granular materials
Granular soil
Mathematical models
Mechanical properties
Particle shape
Soil (material)
数值模拟
机械性能
模拟装配
直接建模方法
粒子形状
装配体
颗粒形状
颗粒状物料
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Summary:The mechanical behavior of granular materials depends much on the shape of the constituent particles. Therefore appropriate modeling of particle, or grain, shape is quite important. This study employed the method of direct modeling of grain shape （Matsushima ＆ Saomto, 2002）, in which, the real shape of a grain is modeled by combining arbitrary number of overlapping circular elements which are connected to each other in a rigid way. Then, accordingly, a discrete-element program is used to simulate the assembly of grains. In order to measure the effects of grain shape on mechanical properties of assembly of grains, three types of grains-high angular grains, medium angular grains and round grains are considered where several biaxial tests are conducted on assemblies with different grain types, The results show that the angularity of grains greatly affects the behavior of granular soil.
ISSN:1674-2001
2210-4291
DOI:10.1016/j.partic.2010.11.005