State-dependent dilatancy in critical-state constitutive modelling of sand

Li, X-S; Dafalias, YF; Wang, Z-L

dc.contributor.author	Li, X-S	en
dc.contributor.author	Dafalias, YF	en
dc.contributor.author	Wang, Z-L	en
dc.date.accessioned	2014-03-01T01:15:13Z
dc.date.available	2014-03-01T01:15:13Z
dc.date.issued	1999	en
dc.identifier.issn	0008-3674	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/13386
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-0033237201&partnerID=40&md5=c1df06d59bb9be7b065d7cbf07a1e811	en
dc.subject	Bounding surface	en
dc.subject	Critical state	en
dc.subject	Dilatancy	en
dc.subject	Phase transformation	en
dc.subject	Soil plasticity	en
dc.subject	State parameter	en
dc.subject.classification	Engineering, Geological	en
dc.subject.classification	Geosciences, Multidisciplinary	en
dc.subject.other	critical state	en
dc.subject.other	dilatancy	en
dc.subject.other	sand	en
dc.subject.other	Mathematical models	en
dc.subject.other	Phase transitions	en
dc.subject.other	Plasticity	en
dc.subject.other	Sand	en
dc.subject.other	Soil mechanics	en
dc.subject.other	Bounding-surface hypoplasticity	en
dc.subject.other	Dilatancy	en
dc.subject.other	Geotechnical engineering	en
dc.title	State-dependent dilatancy in critical-state constitutive modelling of sand	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	1999	en
heal.abstract	A bounding-surface hypoplasticity model is modified to incorporate the basic premises of critical-state soil mechanics and cover both dense and loose sand behavior. The modification consists of rendering the phase-transformation line a function of the state parameter, which measures the difference between the current and critical void ratios at the same value of p, such that when the state parameter is zero, the phase-transformation line becomes identical to the critical-state line in q-p space. As a result the dilatancy depends on the state in a way that yields a zero value at critical state. This dependence allows a realistic modelling of the response of a sand in either loose or dense state, or in the transition from one state to another state. A comparison between model simulations and a sequence of experimental results for drained, undrained, monotonic, and cyclic loading conditions shows that the proposed concept and modelling technique work effectively over a wide range of densities and confining pressures using a unique set of parameters (or parameter dependence) for a given sand.	en
heal.publisher	NATL RESEARCH COUNCIL CANADA	en
heal.journalName	Canadian Geotechnical Journal	en
dc.identifier.isi	ISI:000084040200002	en
dc.identifier.volume	36	en
dc.identifier.issue	4	en
dc.identifier.spage	599	en
dc.identifier.epage	611	en