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Modeling stress-dilatancy for sand under compression and extension loading conditions

TitleModeling stress-dilatancy for sand under compression and extension loading conditions
Publication TypeJournal Article
Year of Publication2010
AuthorsChang CS, Yin Z-Y
JournalJournal of Engineering Mechanics
Volume136
Issue6
Start Page777
Pagination777-786
Date Published05/2010
ISSN 0733-9399
KeywordsCompression, dilatancy, Extension, Micromechanics, plasticity, sand
Abstract

Experimental results show very different stress-dilatancy behavior for sand under compression and extension loading conditions. In order to describe the behavior in both compression and extension conditions, two separate dilatancy equations are needed; one for each case. Furthermore, the effect of inherent anisotropy has not been considered in those equations. In this paper, a new micromechanics based method is presented, by which the stress dilatancy relation is obtained by considering the slip mechanism of the interparticle contacts in all orientations. The method also accounts for the effect of inherent anisotropy in sand. Experimental results on Hostun sand and LSI-30 sand are used for illustration the proposed method.

DOI10.1061/(ASCE)EM.1943-7889.0000116