An anisotropic Model for Structured Soils

Belokas, G; Kavvadas, M

dc.contributor.author	Belokas, G	en
dc.contributor.author	Kavvadas, M	en
dc.date.accessioned	2014-03-01T02:46:40Z
dc.date.available	2014-03-01T02:46:40Z
dc.date.issued	2010	en
dc.identifier.issn	0266-352X	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/32776
dc.subject	Anisotropy	en
dc.subject	Bonding	en
dc.subject	Constitutive relations	en
dc.subject	Plasticity	en
dc.subject	Soil structure	en
dc.subject	Stress-history	en
dc.subject.classification	Computer Science, Interdisciplinary Applications	en
dc.subject.classification	Engineering, Geological	en
dc.subject.classification	Geosciences, Multidisciplinary	en
dc.subject.other	Anisotropic models	en
dc.subject.other	Bond degradation	en
dc.subject.other	Bounding surface plasticity model	en
dc.subject.other	Bounding surfaces	en
dc.subject.other	Elastic region	en
dc.subject.other	Finite Element	en
dc.subject.other	Inner surfaces	en
dc.subject.other	Intrinsic strength	en
dc.subject.other	Lower bounds	en
dc.subject.other	Mathematical formulation	en
dc.subject.other	Non-associated flow rule	en
dc.subject.other	Plastic yield	en
dc.subject.other	Stress-induced anisotropy	en
dc.subject.other	Structure strength	en
dc.subject.other	Structured soil	en
dc.subject.other	Anisotropy	en
dc.subject.other	Geologic models	en
dc.subject.other	Geotechnical engineering	en
dc.subject.other	Numerical methods	en
dc.subject.other	Three dimensional	en
dc.title	An anisotropic Model for Structured Soils	en
heal.type	conferenceItem	en
heal.identifier.primary	10.1016/j.compgeo.2010.05.001	en
heal.identifier.secondary	http://dx.doi.org/10.1016/j.compgeo.2010.05.001	en
heal.language	English	en
heal.publicationDate	2010	en
heal.abstract	The paper presents an incremental plasticity constitutive Model for Structured Soils(MSS-2) to describe the effects of structure (stress history and bonding) on the mechanical behaviour of cohesive soils. Such effects are high initial stiffness, dilatancy and peak strength, their appreciable reduction upon strain-induced de-structuring and the evolution of material anisotropy. The proposed model advances present practice in incremental elasto-plasticity for structured soils by incorporating: (a) distorted ellipsoids, rotated with respect to the isotropic axis, for the Structure Strength Envelope (bounding surface) and the Plastic Yield Envelope (yield surface) to describe the evolution of structure and anisotropy, (b) an Intrinsic Compressibility Framework and a corresponding Intrinsic Strength Envelope which represents a lower bound of the Structure Strength Envelope and is used as reference locus for the structureless material, (c) an improved damage mechanism to model structure degradation by plastic strains and (d) a non-associated flow rule controlled by structure. The proposed model is modular, its features can be activated simultaneously or selectively, and the 3-D tensorial formulation facilitates direct implementation in finite elements codes. (C) 2010 Elsevier Ltd. All rights reserved.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	Numerical Methods in Geotechnical Engineering - Proceedings of the 7th European Conference on Numerical Methods in Geotechnical Engineering	en
dc.identifier.doi	10.1016/j.compgeo.2010.05.001	en
dc.identifier.isi	ISI:000281877700001	en
dc.identifier.volume	37	en
dc.identifier.issue	6	en
dc.identifier.spage	27	en
dc.identifier.epage	32	en