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Sand plasticity model accounting for inherent fabric anisotropy

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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


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