Plasticity modeling of the effect of sample preparation method on sand response

Papadimitriou, AG; Dafalias, YF; Yoshimine, M

dc.contributor.author	Papadimitriou, AG	en
dc.contributor.author	Dafalias, YF	en
dc.contributor.author	Yoshimine, M	en
dc.date.accessioned	2014-03-01T02:43:28Z
dc.date.available	2014-03-01T02:43:28Z
dc.date.issued	2005	en
dc.identifier.issn	0038-0806	en
dc.identifier.uri	https://dspace.lib.ntua.gr/xmlui/handle/123456789/31427
dc.relation.uri	http://www.scopus.com/inward/record.url?eid=2-s2.0-33751081130&partnerID=40&md5=0dd0d310c285d09f153646e2fdc0b37f	en
dc.subject	Anisotropy	en
dc.subject	Constitutive equation of soil	en
dc.subject	Dilatancy plasticity	en
dc.subject	Sand	en
dc.subject	Soil structure	en
dc.subject	Test procedure (IGC: D3/D6/E13)	en
dc.subject.classification	Engineering, Geological	en
dc.subject.classification	Geosciences, Multidisciplinary	en
dc.subject.other	ABS resins	en
dc.subject.other	Anisotropy	en
dc.subject.other	Elasticity	en
dc.subject.other	Fabrics	en
dc.subject.other	Plasticity	en
dc.subject.other	Plastics	en
dc.subject.other	Polypropylenes	en
dc.subject.other	Sand	en
dc.subject.other	Shear deformation	en
dc.subject.other	Soils	en
dc.subject.other	Stresses	en
dc.subject.other	Tensors	en
dc.subject.other	Constitutive equation of soil	en
dc.subject.other	Dilatancy plasticity	en
dc.subject.other	Effective stresses	en
dc.subject.other	Experimental evidences	en
dc.subject.other	Fabric anisotropies	en
dc.subject.other	Fabric tensors	en
dc.subject.other	Hardening responses	en
dc.subject.other	Loading directions	en
dc.subject.other	Mechanical responses	en
dc.subject.other	Model constants	en
dc.subject.other	Modeling	en
dc.subject.other	Preparation methods	en
dc.subject.other	Sample preparation methods	en
dc.subject.other	Second orders	en
dc.subject.other	Soil structure	en
dc.subject.other	Stress-strain	en
dc.subject.other	Test procedure (IGC: D3/D6/E13)	en
dc.subject.other	Toyoura sands	en
dc.subject.other	Undrained	en
dc.subject.other	Void ratios	en
dc.subject.other	Constitutive equations	en
dc.title	Plasticity modeling of the effect of sample preparation method on sand response	en
heal.type	conferenceItem	en
heal.language	English	en
heal.publicationDate	2005	en
heal.abstract	Experimental evidence shows that different preparation methods produce sand samples with distinctly different stress-strain response. This paper explores and draws conclusions from the measured differences on the monotonic undrained triaxial response of Toyoura sand, prepared by different methods at the same values of void ratio and initial effective stresses. This is achieved by comparing data and simulations performed with a recently developed plasticity constitutive model, which accounts for the effect of inherent fabric anisotropy on the mechanical response. The inherent fabric anisotropy is represented by a second order symmetric fabric tensor, and its effect on the response at different loading directions is expressed by an appropriate dependence of certain constitutive ingredients on a joint isotropic invariant of the loading direction and the fabric tensor. Use of this constitutive scheme to simulate the aforementioned data on Toyoura sand exploits the fact that the preparation method affects both the dilatancy and the hardening response in a systematic manner. Under the premise that these effects are due to the different inherent fabric created by the preparation method, it follows that the foregoing simulations do not require changes in constitutive equations or entirely different sets of model constants. On the contrary, only model constants related to this inherent fabric anisotropy scheme need readjustment, providing insight to how the sample preparation method affects the response and what can be done to model it.	en
heal.publisher	JAPANESE GEOTECHNICAL SOC	en
heal.journalName	Soils and Foundations	en
dc.identifier.isi	ISI:000229796000010	en
dc.identifier.volume	45	en
dc.identifier.issue	2	en
dc.identifier.spage	109	en
dc.identifier.epage	123	en