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Micromechanical modeling for inherent anisotropy in granular materials

TitleMicromechanical modeling for inherent anisotropy in granular materials
Publication TypeJournal Article
Year of Publication2010
AuthorsChang CS, Yin Z-Y
JournalASCE Journal of Engineering Mechanics
Volume136
Issue7
Start Page830
Pagination830-839
Date Published07/2010
ISSN0733-9399
Keywordsanisotropy, granular material, Micromechanics, sand, Stress-strain relationship, True triaxial test
Abstract

In this paper, a description of inherent anisotropy of soil, based on micromechanics framework, is presented. The problem is formulated by assuming that sliding of two contact particles governed by Coulomb criterion in which the friction angle is a function of the orientation of the interparticle contact. The orientation distribution of these parameters is described by a set of symmetric second-order tensors. The formulation of the problem is illustrated by simulations of Santa Monica Beach Sand under true triaxial tests. In particular, the directional dependence of the strength characteristics is examined for samples with inherent cross anisotropy. The orientations of failure planes between particles are also examined.

DOI10.1061/ ASCEEM.1943-7889.0000125