Sand plasticity model accounting for inherent fabric anisotropy

Dafalias, YF; Papadimitriou, AG; Li, XS

dc.contributor.author	Dafalias, YF	en
dc.contributor.author	Papadimitriou, AG	en
dc.contributor.author	Li, XS	en
dc.date.accessioned	2014-03-01T01:21:19Z
dc.date.available	2014-03-01T01:21:19Z
dc.date.issued	2004	en
dc.identifier.issn	0733-9399	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/16199
dc.subject.classification	Engineering, Mechanical	en
dc.subject.other	Anisotropy	en
dc.subject.other	Computer simulation	en
dc.subject.other	Loads (forces)	en
dc.subject.other	Mathematical models	en
dc.subject.other	Mechanical testing	en
dc.subject.other	Plasticity	en
dc.subject.other	Stress analysis	en
dc.subject.other	Tensors	en
dc.subject.other	Inherent fabric anisotropy	en
dc.subject.other	Mechanical response	en
dc.subject.other	Plastic modulus	en
dc.subject.other	Sand plasticity	en
dc.subject.other	Sand	en
dc.subject.other	constitutive equation	en
dc.subject.other	plasticity	en
dc.subject.other	sand	en
dc.subject.other	soil mechanics	en
dc.title	Sand plasticity model accounting for inherent fabric anisotropy	en
heal.type	journalArticle	en
heal.identifier.primary	10.1061/(ASCE)0733-9399(2004)130:11(1319)	en
heal.identifier.secondary	http://dx.doi.org/10.1061/(ASCE)0733-9399(2004)130:11(1319)	en
heal.language	English	en
heal.publicationDate	2004	en
heal.abstract	A sand plasticity constitutive model is presented herein, which accounts for the effect of inherent fabric anisotropy on the mechanical response. The anisotropy associated with particles' orientation distribution, is represented by a second-order symmetric fabric tensor, and its effect is quantified via a scalar-valued anisotropic state variable. A. A is defined as the first joint isotropic invariant of the fabric tensor and a properly defined loading direction tensor, scaled by a function of a corresponding Lode angle. The hardening plastic modulus and the location of the critical state line in the void ratio - mean effective stress space, on which the dilatancy depends, are made functions of A. The incorporation of this dependence on A in a pre-existing stress-ratio driven, bounding surface plasticity constitutive model, achieves successful simulations of test results on sand for a wide variation of densities, pressures, loading manners, and directions. In particular, the drastic difference in material response observed experimentally for different directions of the principal stress axes with respect to the anisotropy axes. is well simulated by the model. The proposed definition and use of A has generic value, and can be incorporated in a large number of other constitutive models in order to account for inherent fabric anisotropy effects. © ASCE.	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)130:11(1319)	en
dc.identifier.isi	ISI:000225112700007	en
dc.identifier.volume	130	en
dc.identifier.issue	11	en
dc.identifier.spage	1319	en
dc.identifier.epage	1333	en