Plasticity model for sand under small and large cyclic strains

Papadimitriou, AG; Bouckovalas, GD; Dafalias, YF

dc.contributor.author	Papadimitriou, AG	en
dc.contributor.author	Bouckovalas, GD	en
dc.contributor.author	Dafalias, YF	en
dc.date.accessioned	2014-03-01T01:16:57Z
dc.date.available	2014-03-01T01:16:57Z
dc.date.issued	2001	en
dc.identifier.issn	1090-0241	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/14285
dc.subject	Constitutive Model	en
dc.subject	Pore Pressure	en
dc.subject	Shear Modulus	en
dc.subject.classification	Engineering, Geological	en
dc.subject.classification	Geosciences, Multidisciplinary	en
dc.subject.other	Cyclic strains	en
dc.subject.other	Computer simulation	en
dc.subject.other	Elastic moduli	en
dc.subject.other	Liquefaction	en
dc.subject.other	Plasticity testing	en
dc.subject.other	Sand	en
dc.subject.other	Strain measurement	en
dc.subject.other	constitutive equation	en
dc.subject.other	cyclic loading	en
dc.subject.other	plasticity	en
dc.subject.other	sand	en
dc.subject.other	stress-strain relationship	en
dc.title	Plasticity model for sand under small and large cyclic strains	en
heal.type	journalArticle	en
heal.identifier.primary	10.1061/(ASCE)1090-0241(2001)127:11(973)	en
heal.identifier.secondary	http://dx.doi.org/10.1061/(ASCE)1090-0241(2001)127:11(973)	en
heal.language	English	en
heal.publicationDate	2001	en
heal.abstract	A plasticity constitutive model for sands is proposed, which combines a bounding surface framework for large cyclic strains with a Ramberg-Osgood-type hysteretic formulation for relatively smaller strains. The distinction between small and large cyclic strains is based on the volumetric threshold cyclic shear strain gamma (tv), a well-established geotechnical parameter. The state parameter psi is used explicitly to interrelate the critical, peak-, and dilatancy deviatoric stress ratios. The plastic modulus is expressed as a particular function of accumulated plastic volumetric strain, which simulates empirically the effect of fabric evolution during shearing. Extensive comparisons with experiments show accurate simulation of the basic aspects of cyclic behavior for a wide range of cyclic strain amplitudes, specifically, (1) the degradation of shear modulus and increase of hysteretic damping with cyclic shear strain amplitude; (2) the evolving rates of shear strain and excess pore pressure (or volumetric strain) accumulation with number of cycles; and (3) the resistance to liquefaction, The 14 model parameters are proven independent of initial and drainage conditions, as well as the cyclic shear strain amplitude. The simulation of monotonic shearing is equally accurate.	en
heal.publisher	ASCE-AMER SOC CIVIL ENGINEERS	en
heal.journalName	Journal of Geotechnical and Geoenvironmental Engineering	en
dc.identifier.doi	10.1061/(ASCE)1090-0241(2001)127:11(973)	en
dc.identifier.isi	ISI:000171788100008	en
dc.identifier.volume	127	en
dc.identifier.issue	11	en
dc.identifier.spage	973	en
dc.identifier.epage	983	en