Constitutive modeling of inherently anisotropic sand behavior

Li, XS; Dafalias, YF

dc.contributor.author	Li, XS	en
dc.contributor.author	Dafalias, YF	en
dc.date.accessioned	2014-03-01T01:17:40Z
dc.date.available	2014-03-01T01:17:40Z
dc.date.issued	2002	en
dc.identifier.issn	1090-0241	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/14606
dc.subject	Anisotropy	en
dc.subject	Constitutive models	en
dc.subject	Dilatancy	en
dc.subject	Plasticity	en
dc.subject	Sand	en
dc.subject.classification	Engineering, Geological	en
dc.subject.classification	Geosciences, Multidisciplinary	en
dc.subject.other	Computer simulation	en
dc.subject.other	Plasticity	en
dc.subject.other	Sand	en
dc.subject.other	Stress analysis	en
dc.subject.other	Tensors	en
dc.subject.other	Void ratio	en
dc.subject.other	Anisotropy	en
dc.subject.other	anisotropy	en
dc.subject.other	constitutive equation	en
dc.subject.other	plasticity	en
dc.subject.other	sand	en
dc.title	Constitutive modeling of inherently anisotropic sand behavior	en
heal.type	journalArticle	en
heal.identifier.primary	10.1061/(ASCE)1090-0241(2002)128:10(868)	en
heal.identifier.secondary	http://dx.doi.org/10.1061/(ASCE)1090-0241(2002)128:10(868)	en
heal.language	English	en
heal.publicationDate	2002	en
heal.abstract	A plasticity constitutive framework for modeling inherently anisotropic sand behavior is presented within a modified form of critical state soil mechanics. A second-order symmetric fabric tensor, F-ij, describes the material inherent anisotropy, and a scalar-valued anisotropic state variable A is properly defined in terms of a joint invariant of F-ij and the stress tensor. The location of the critical state line in the plane of void ratio and effective mean normal stress is not fixed but depends on A, rendering the soil dilatancy also a function of A. In addition, the plastic modulus is made a function of A. The incorporation of these two modifications in terms of A in an existing stress-ratio bounding surface model, achieves the successful simulation of both the contractive and dilative responses of sand over a wide range of variations in stress and density as shown by experimental data. Of particular significance are the results which exhibit the drastic effect of different principal stress orientations in reference to the material axes of anisotropy.	en
heal.publisher	ASCE-AMER SOC CIVIL ENGINEERS	en
heal.journalName	Journal of Geotechnical and Geoenvironmental Engineering	en
dc.identifier.doi	10.1061/(ASCE)1090-0241(2002)128:10(868)	en
dc.identifier.isi	ISI:000178230800007	en
dc.identifier.volume	128	en
dc.identifier.issue	10	en
dc.identifier.spage	868	en
dc.identifier.epage	880	en