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Quantifying stress-induced anisotropy using inter-void constrictions

Shire, Thomas; O'Sullivan, Catherine; Barreto, Daniel; Gaudray, G.

Authors

Thomas Shire

Catherine O'Sullivan

G. Gaudray



Abstract

In particulate geomechanics it is common to quantify fabric anisotropy using contact and particle orientations. Measurement of void anisotropy is less common, most likely owing to the difficulties associated with defining individual voids. Here a Delaunay tessellation-based approach is applied to measure anisotropy of the inter-void constriction orientations. This new measure of fabric anisotropy was capable of identifying stress-induced anisotropy in discrete-element modelling true triaxial simulations with spherical particles. A relationship is established between the constriction orientations, the macro-scale principal stress directions and the micro-scale contact normal orientations.

Journal Article Type Article
Publication Date 2013-01
Deposit Date Sep 27, 2012
Print ISSN 0016-8505
Electronic ISSN 1751-7656
Publisher ICE Publishing
Peer Reviewed Peer Reviewed
Volume 63
Issue 1
Pages 85-91
DOI https://doi.org/10.1680/geot.11.t.020
Keywords fabric/structure of soils; discrete-element modelling; anisotropy
Public URL http://researchrepository.napier.ac.uk/id/eprint/5672
Publisher URL http://dx.doi.org/10.1680/geot.11.T.020