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A variational Cam-clay theory of plasticity

Ortiz, M. and Pandolfi, A. (2004) A variational Cam-clay theory of plasticity. Computer Methods in Applied Mechanics and Engineering, 193 (27-29). pp. 2645-2666. ISSN 0045-7825.

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We present a finite deformation constitutive theory for non-cohesive granular media. The material model falls in the family of the so-called Cam-clay theories. As typical of Cam-clay models, soil is assumed to be frictional with a logarithmic-type compression. The same state boundary surface––described by ellipses––is taken as yield and plastic potential surface. Hardening is related only to plastic volumetric strains. The large deformation theory is based on the multiplicative decomposition of the deformation gradient into elastic and inelastic parts. We extend the stress update algorithms from small-strain plasticity to finite plasticity through the logarithmic and exponential mappings and adopt a fully variational characterization of the visco-plastic constitutive updates.

Item Type:Article
Related URLs:
URLURL TypeDescription
Ortiz, M.0000-0001-5877-4824
Pandolfi, A.0000-0002-7084-7456
Additional Information:© 2004 Elsevier. Received 6 May 2003, Revised 15 August 2003, Accepted 26 August 2003, Available online 18 March 2004. The support of the Army Research Office and the Army Research Laboratory through a CHSSI grant is gratefully acknowledged.
Funding AgencyGrant Number
Army Research Office (ARO)UNSPECIFIED
Army Research LaboratoryUNSPECIFIED
Subject Keywords:Variational Cam-clay theory; Plasticity
Issue or Number:27-29
Record Number:CaltechAUTHORS:20171128-114018119
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Official Citation:M Ortiz, A Pandolfi, A variational Cam-clay theory of plasticity, In Computer Methods in Applied Mechanics and Engineering, Volume 193, Issues 27–29, 2004, Pages 2645-2666, ISSN 0045-7825, (
Usage Policy:No commercial reproduction, distribution, display or performance rights in this work are provided.
ID Code:83523
Deposited By: Lydia Suarez
Deposited On:28 Nov 2017 22:06
Last Modified:24 Feb 2020 10:30

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