Simple plasticity sand model accounting for fabric change effects

Dafalias, YF; Manzari, MT

dc.contributor.author	Dafalias, YF	en
dc.contributor.author	Manzari, MT	en
dc.date.accessioned	2014-03-01T01:21:24Z
dc.date.available	2014-03-01T01:21:24Z
dc.date.issued	2004	en
dc.identifier.issn	0733-9399	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16222
dc.subject	Constitutive relations	en
dc.subject	Fabrics	en
dc.subject	Models	en
dc.subject	Plasticity	en
dc.subject	Sand	en
dc.subject.classification	Engineering, Mechanical	en
dc.subject.other	Computer simulation	en
dc.subject.other	Cyclic loads	en
dc.subject.other	Mathematical models	en
dc.subject.other	Plasticity	en
dc.subject.other	Pressure effects	en
dc.subject.other	Stresses	en
dc.subject.other	Sand models	en
dc.subject.other	Stress space	en
dc.subject.other	Sand	en
dc.subject.other	fabric	en
dc.title	Simple plasticity sand model accounting for fabric change effects	en
heal.type	journalArticle	en
heal.identifier.primary	10.1061/(ASCE)0733-9399(2004)130:6(622)	en
heal.identifier.secondary	http://dx.doi.org/10.1061/(ASCE)0733-9399(2004)130:6(622)	en
heal.language	English	en
heal.publicationDate	2004	en
heal.abstract	A simple stress-ratio controlled, critical state compatible, sand plasticity model is presented, first in the triaxial and then in generalized stress space. The model builds upon previous work of the writers, albeit the presentation here is made with extreme simplicity in mind, and three novel aspects are introduced. The first is a fabric-dilatancy related quantity, scalar valued in the triaxial and tensor valued in generalized stress space, which is instrumental in modeling macroscopically the effect of fabric changes during the dilatant phase of deformation on the subsequent contractant response upon load increment reversals, and the ensuing realistic simulation of the sand behavior under undrained cyclic loading. The second aspect is the dependence of the plastic strain rate direction on a modified Lode angle in the multiaxial generalization, a feature necessary to produce realistic stress-strain simulations in nontriaxial conditions. The third aspect is a very systematic connection between the simple triaxial and the general multiaxial formulation, in order to use correctly the model parameters of the former in the implementation of the latter. The simulative ability of the model is illustrated by comparison with data over a very wide range of pressures and densities. © ASCE / JUNE 2004.	en
heal.publisher	ASCE-AMER SOC CIVIL ENGINEERS	en
heal.journalName	Journal of Engineering Mechanics	en
dc.identifier.doi	10.1061/(ASCE)0733-9399(2004)130:6(622)	en
dc.identifier.isi	ISI:000221608700002	en
dc.identifier.volume	130	en
dc.identifier.issue	6	en
dc.identifier.spage	622	en
dc.identifier.epage	634	en