Micromechanics of shear bands in granular media

Alonso-Marroquin, F; Vardoulakis, I

dc.contributor.author	Alonso-Marroquin, F	en
dc.contributor.author	Vardoulakis, I	en
dc.date.accessioned	2014-03-01T02:50:10Z
dc.date.available	2014-03-01T02:50:10Z
dc.date.issued	2005	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/34921
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-84857520956&partnerID=40&md5=f826c7b695fbc625cfae5c0b0ebc93d4	en
dc.subject.other	Cosserat theory	en
dc.subject.other	Critical state	en
dc.subject.other	Displacement field	en
dc.subject.other	Expected values	en
dc.subject.other	Finite width	en
dc.subject.other	Frictional dissipation	en
dc.subject.other	Granular media	en
dc.subject.other	Molecular dynamics simulations	en
dc.subject.other	Rotational modes	en
dc.subject.other	Simple shear	en
dc.subject.other	Strain localizations	en
dc.subject.other	Tectonic activity	en
dc.subject.other	Critical current density (superconductivity)	en
dc.subject.other	Granular materials	en
dc.subject.other	Micromechanics	en
dc.subject.other	Molecular dynamics	en
dc.subject.other	Powders	en
dc.subject.other	Shear bands	en
dc.title	Micromechanics of shear bands in granular media	en
heal.type	conferenceItem	en
heal.publicationDate	2005	en
heal.abstract	The aim of this work is to study the strain localization and the fluctuations in shear bands using molecular dynamics simulations. We show that: (1) The localization of frictional dissipation acts as a precursor mechanism of failure; (2) Buckling of chain forces may explain the finite width of shear bands; (3) The building and collapse of stress columns lead to stress and dilatancy fluctuations in the critical state; (4) Vorticities in the displacement field assisted by rolling between the grains reduce the dissipation with respect to the expected value of simple shear. The implications of these rotational modes in the Cosserat theory and in the study of tectonic activity are outlined. © 2005 Taylor & Francis Group.	en
heal.journalName	Powders and Grains 2005 - Proceedings of the 5th International Conference on Micromechanics of Granular Media	en
dc.identifier.volume	1	en
dc.identifier.spage	701	en
dc.identifier.epage	704	en