Particle shape consideration in numerical simulation of assemblies of irregularly shaped particles--颗粒学报PARTICUOLOGY

Abedi, S., & Mirghasemi, A. A. (2011). Particle shape consideration in numerical simulation of assemblies of irregularly shaped particles. Particuology, 9(4), 387–397. https://doi.org/10.1016/j.partic.2010.11.005

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

Saba Abedi, Ali Asghar Mirghasemi^*

School of Civil Engineering, College of Engineering, University of Tehran, Tehran P.O. Box 11155-4563, Iran

10.1016/j.partic.2010.11.005

Volume 9, Issue 4, August 2011, Pages 387-397

Received 30 June 2010, Revised 23 November 2010, Accepted 30 November 2010, Available online 11 May 2011.

E-mail: aghasemi@ut.ac.ir

Highlights

Abstract

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.

Graphical abstract

Keywords

Discrete element method; Granular soil; Angularity; Confining pressure

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