Mechanical modelling of drained creep triaxial tests on loose sand

Di Prisco, C; Imposimato, S; Vardoulakis, I

dc.contributor.author	Di Prisco, C	en
dc.contributor.author	Imposimato, S	en
dc.contributor.author	Vardoulakis, I	en
dc.date.accessioned	2014-03-01T01:50:00Z
dc.date.available	2014-03-01T01:50:00Z
dc.date.issued	2000	en
dc.identifier.issn	0016-8505	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/25980
dc.subject	constitutive relations	en
dc.subject	creep	en
dc.subject	sands	en
dc.subject.classification	Engineering, Geological	en
dc.subject.classification	Geosciences, Multidisciplinary	en
dc.subject.other	COLLAPSE	en
dc.title	Mechanical modelling of drained creep triaxial tests on loose sand	en
heal.type	journalArticle	en
heal.language	English	en
heal.publicationDate	2000	en
heal.abstract	The problem of mechanical instability of loose sand specimens during drained load controlled triaxial compression tests (creep tests) is discussed. In order to model mathematically such a phenomenon, a strain hardening elasto-visco-plastic constitutive model is extended so as to incorporate frictional strain-rate softening. The model is defined by a non-associated flow rule and by a Drucker-Prager-type yield surface which is equipped with two state variables, r and alpha. Variable r accounts for shear strain-induced anisotropy, while variable alpha accounts for volumetric strain hardening. The dynamic non-linearities of the strain response are discussed and theoretical predictions seem to reproduce experimental results quite well.	en
heal.publisher	THOMAS TELFORD SERVICES LTD	en
heal.journalName	GEOTECHNIQUE	en
dc.identifier.isi	ISI:000086571600007	en
dc.identifier.volume	50	en
dc.identifier.issue	1	en
dc.identifier.spage	73	en
dc.identifier.epage	82	en