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

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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.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

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