A destructuration theory and its application to SANICLAY model

Taiebat, M; Dafalias, YF; Peek, R

dc.contributor.author	Taiebat, M	en
dc.contributor.author	Dafalias, YF	en
dc.contributor.author	Peek, R	en
dc.date.accessioned	2014-03-01T01:32:26Z
dc.date.available	2014-03-01T01:32:26Z
dc.date.issued	2010	en
dc.identifier.issn	0363-9061	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/20132
dc.subject	Anisotropy	en
dc.subject	Clays	en
dc.subject	Constitutive relations	en
dc.subject	Destructuration	en
dc.subject	Plasticity	en
dc.subject.classification	Engineering, Geological	en
dc.subject.classification	Materials Science, Multidisciplinary	en
dc.subject.classification	Mechanics	en
dc.subject.other	Additional dependences	en
dc.subject.other	Calibration procedure	en
dc.subject.other	Constitutive relations	en
dc.subject.other	Critical stress ratio	en
dc.subject.other	Destructuration	en
dc.subject.other	Deviatoric strain	en
dc.subject.other	Flow rules	en
dc.subject.other	Friction angles	en
dc.subject.other	Isotropic stress	en
dc.subject.other	Lower complexity	en
dc.subject.other	Model constants	en
dc.subject.other	Natural clays	en
dc.subject.other	Simplified models	en
dc.subject.other	Structured clay	en
dc.subject.other	Undrained	en
dc.subject.other	Yield surface	en
dc.subject.other	Anisotropy	en
dc.subject.other	Friction	en
dc.subject.other	Plasticity	en
dc.subject.other	Shear strength	en
dc.subject.other	Strain rate	en
dc.subject.other	Computer simulation	en
dc.subject.other	anisotropy	en
dc.subject.other	calibration	en
dc.subject.other	clay	en
dc.subject.other	compression	en
dc.subject.other	computer simulation	en
dc.subject.other	extension	en
dc.subject.other	numerical model	en
dc.subject.other	plasticity	en
dc.subject.other	shear strength	en
dc.subject.other	strain rate	en
dc.title	A destructuration theory and its application to SANICLAY model	en
heal.type	journalArticle	en
heal.identifier.primary	10.1002/nag.841	en
heal.identifier.secondary	http://dx.doi.org/10.1002/nag.841	en
heal.language	English	en
heal.publicationDate	2010	en
heal.abstract	Many natural clays have an undisturbed shear strength in excess of the remoulded strength. Destructuration modeling provides a means to account for such sensitivity in a constitutive model. This paper extends the SANICLAY model to include destructuration. Two distinct types of destructuration are considered: isotropic and frictional. The former is a concept already presented in relation to other models and in essence constitutes a mechanism of isotropic softening of the yield surface with destructuration. The latter refers to the reduction of the critical stress ratio reflecting the effect of destructuration on the friction angle, and is believed to be a novel proposition. Both the types depend on a measure of destructuration rate expressed in terms of combined plastic volumetric and deviatoric strain rates. The SANICLAY model itself is generalized from its previous form by additional dependence of the yield surface on the third isotropic stress invariant. Such a generalization allows to obtain as particular cases simplified model versions of lower complexity including one with a single surface and associative flow rule, by simply setting accordingly parameters of the generalized version. A detailed calibration procedure of the relatively few model constants is presented, and the performance of three versions of the model, in descending order of complexity, is validated by comparison of simulations to various data for oedometric consolidation followed by triaxial undrained compression and extension tests on two structured clays. Copyright (C) 2009 John Wiley & Sons, Ltd.	en
heal.publisher	JOHN WILEY & SONS LTD	en
heal.journalName	International Journal for Numerical and Analytical Methods in Geomechanics	en
dc.identifier.doi	10.1002/nag.841	en
dc.identifier.isi	ISI:000280023800002	en
dc.identifier.volume	34	en
dc.identifier.issue	10	en
dc.identifier.spage	1009	en
dc.identifier.epage	1040	en