Discrete element modeling of inherently anisotropic granular assemblies with polygonal particles--颗粒学报PARTICUOLOGY

Seyedi Hosseininia, E. (2012). Discrete element modeling of inherently anisotropic granular assemblies with polygonal particles. Particuology, 10(5), 542–552. https://doi.org/10.1016/j.partic.2011.11.015

Discrete element modeling of inherently anisotropic granular assemblies with polygonal particles

Ehsan Seyedi Hosseininia^*

Civil Engineering Department, Faculty of Engineering, Ferdowsi University of Mashhad, Mashhad, Iran

10.1016/j.partic.2011.11.015

Volume 10, Issue 5, October 2012, Pages 542-552

Received 22 August 2011, Revised 12 October 2011, Accepted 24 November 2011, Available online 12 April 2012.

E-mail: eseyedi@um.ac.ir

Highlights

► Biaxial compression tests were performed using DEM on inherently anisotropic granular assemblies with polygonal particles.

► Initial bedding angle has a great influence on the mobilized shear strength and volume change during loading.

► Particle angularity influences both the mobilized shear strength and the volume change response, which originates from the interlocking resistance between particles.

Abstract

In the present article, we study the effect of inherent anisotropy, i.e., initial bedding angle of particles and associated voids on macroscopic mechanical behavior of granular materials, by numerical simulation of several biaxial compression tests using the discrete element method (DEM). Particle shape is considered to be irregular convex-polygonal. The effect of inherent anisotropy is investigated by following the evolution of mobilized shear strength and volume change during loading. As experimental tests have already shown, numerical simulations also indicate that initial anisotropic condition has a great influence on the strength and deformational behavior of granular assemblies. Comparison of simulations with tests using oval particles, shows that angularity influences both the mobilized shear strength and the volume change regime, which originates from the interlocking resistance between particles.

Graphical abstract

Keywords

Inherent anisotropy; Granular material; Discrete element method; Polygonal particles

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