A critical state two-surface plasticity model for sands

Manzari, MT; Dafalias, YF

dc.contributor.author	Manzari, MT	en
dc.contributor.author	Dafalias, YF	en
dc.date.accessioned	2014-03-01T01:12:32Z
dc.date.available	2014-03-01T01:12:32Z
dc.date.issued	1997	en
dc.identifier.issn	0016-8505	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/12121
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0031171020&partnerID=40&md5=9c09911b06516479bf6c00c888164722	en
dc.subject	Anisotropy	en
dc.subject	Bounding surface	en
dc.subject	Critical state	en
dc.subject	Plasticity	en
dc.subject	Sands	en
dc.subject	State parameter	en
dc.subject.classification	Engineering, Geological	en
dc.subject.classification	Geosciences, Multidisciplinary	en
dc.subject.other	Anisotropy	en
dc.subject.other	Mathematical models	en
dc.subject.other	Numerical analysis	en
dc.subject.other	Plasticity	en
dc.subject.other	Pore pressure	en
dc.subject.other	Sand	en
dc.subject.other	Strain	en
dc.subject.other	Stresses	en
dc.subject.other	Critical state plasticity	en
dc.subject.other	Soil mechanics	en
dc.subject.other	constitutive model	en
dc.subject.other	critical state	en
dc.subject.other	plasticity model	en
dc.subject.other	sand	en
dc.subject.other	stress/strain	en
dc.title	A critical state two-surface plasticity model for sands	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	1997	en
heal.abstract	Within the critical state soil mechanics framework, the two-surface formulation of plasticity is coupled with the state parameter to construct a constitutive model for sands in a general stress space. The operation of the two-surface model takes place in the deviatoric stress-ratio space, and the state parameter is used to define the peak and dilatancy stress ratios of sand. The model is capable of realistically simulating stress-strain behaviour of sands under monotonic and cyclic, drained and undrained loading conditions. It includes features such as the softening of sands at states denser than critical as they dilate in drained loading and softening of sands looser than critical in undrained loading, and the pore-water pressure increase under undrained cyclic loading. Most important, all these simulations are achieved by a unique set of model constants at all densities and confining pressures of engineering relevance for a given sand. The numerical implementation of the model is particularly easy and efficient due to the very simple formulation. Calibration of model constants is done straightforwardly on the basis of triaxial experiments and measurements of well-known characteristics of sand stress-strain behaviour. Possibly the most attractive feature of the model is its simplicity and its foundation on concepts and data which are well established and understood by the geotechnical engineering community, with basic reference to critical state soil mechanics.	en
heal.publisher	THOMAS TELFORD SERVICES LTD	en
heal.journalName	Geotechnique	en
dc.identifier.isi	ISI:A1997XG95900004	en
dc.identifier.volume	47	en
dc.identifier.issue	2	en
dc.identifier.spage	255	en
dc.identifier.epage	272	en