Plasticity model for sand under small and large cyclic strains: A multiaxial formulation

Papadimitriou, AG; Bouckovalas, GD

dc.contributor.author	Papadimitriou, AG	en
dc.contributor.author	Bouckovalas, GD	en
dc.date.accessioned	2014-03-01T01:18:13Z
dc.date.available	2014-03-01T01:18:13Z
dc.date.issued	2002	en
dc.identifier.issn	0267-7261	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/14870
dc.subject	Bounding surface	en
dc.subject	Constitutive equations	en
dc.subject	Critical state	en
dc.subject	Cyclic loading	en
dc.subject	Fabric	en
dc.subject	Hysteresis	en
dc.subject	Liquefaction	en
dc.subject	Sand	en
dc.subject	State parameter	en
dc.subject.classification	Engineering, Geological	en
dc.subject.classification	Geosciences, Multidisciplinary	en
dc.subject.other	Elastic moduli	en
dc.subject.other	Failure (mechanical)	en
dc.subject.other	Hardening	en
dc.subject.other	Hysteresis	en
dc.subject.other	Kinematics	en
dc.subject.other	Mathematical models	en
dc.subject.other	Phase transitions	en
dc.subject.other	Plasticity	en
dc.subject.other	Shear stress	en
dc.subject.other	Strain rate	en
dc.subject.other	Cyclic shearing	en
dc.subject.other	Sand	en
dc.subject.other	cyclic loading	en
dc.subject.other	liquefaction	en
dc.subject.other	plasticity	en
dc.subject.other	sand	en
dc.subject.other	shear	en
dc.subject.other	soil dynamics	en
dc.title	Plasticity model for sand under small and large cyclic strains: A multiaxial formulation	en
heal.type	journalArticle	en
heal.identifier.primary	10.1016/S0267-7261(02)00009-X	en
heal.identifier.secondary	http://dx.doi.org/10.1016/S0267-7261(02)00009-X	en
heal.language	English	en
heal.publicationDate	2002	en
heal.abstract	This paper presents the multiaxial formulation of a plasticity model for sand under cyclic shearing. The model adopts a kinematic hardening circular cone as the yield surface and three non-circular conical surfaces corresponding to the deviatoric stress ratios at phase transformation, peak strength and critical state. The shape of the non-circular surfaces is formulated in accordance with the experimentally established failure criteria, while their size is related to the value of the state parameter psi. To simulate cyclic response under small and large shear strain amplitudes without a change in model parameters, it was found necessary to introduce: (a) a non-linear hysteretic (Ramberg-Osgood type) formulation for the strain rate of elastic states and (b) an empirical index of the effect of fabric evolution during shearing which scales the plastic modulus. This index is estimated in terms of a macroscopic second-order fabric tensor, which develops as a function of the plastic volumetric strain increment and the loading direction in the deviatoric plane. Comparison of simulations to pertinent data from 27 resonant column, cyclic triaxial and cyclic direct simple shear tests provide a measure for the overall accuracy of the model. (C) 2002 Elsevier Science Ltd. All rights reserved.	en
heal.publisher	ELSEVIER SCI LTD	en
heal.journalName	Soil Dynamics and Earthquake Engineering	en
dc.identifier.doi	10.1016/S0267-7261(02)00009-X	en
dc.identifier.isi	ISI:000176275800003	en
dc.identifier.volume	22	en
dc.identifier.issue	3	en
dc.identifier.spage	191	en
dc.identifier.epage	204	en