Please use this identifier to cite or link to this item: http://hdl.handle.net/1959.13/925044

OpenURL Link
Title
A variational principle of elastoplasticity and its application to the modeling of frictional materials
Author/Creator
Krabbenhøft, K.
Institution
The University of Newcastle. Faculty of Engineering & Built Environment, School of Engineering
Description
Starting from a thermomechanical description of elastoplasticity, a stress-based variational principle is derived. The principle, which generalizes von Mises’s principle of maximum plastic dissipation, reproduces the conventional elastic/hardening-plastic framework applicable to metals as a special case and further proves to be suitable for developing constitutive models for frictional materials. Application of the principle to the isotropic and triaxal compression behaviour of sands is considered by means of a non-conventional extension of the modified Cam clay model. The new model allows for the specification of arbitrary stress-dilatancy relations without altering the yield potential or introducing a separate flow potential. Moreover, the elastoplastic tangent modulus is always symmetric, regardless of the degree of apparent nonassociativity.
Relation
International Journal of Solids and Structures Vol. 46, Issue 3-4, p. 464-479
Publisher Link
http://dx.doi.org/10.1016/j.ijsolstr.2008.09.020
Date
2009
Publisher
Elsevier
Keyword(s)
plasticity;  friction;  geomaterials;  sand;  soil;  variational principles;  optimization
Resource Type
journal article
Identifier
http://hdl.handle.net/1959.13/925044
Identifier
ISSN:0020-7683
Reviewed
Reviewed
15 Visitors 16 Hits 0 Downloads
Save/E-mail Citation
Citation Format
E-mail Address
Subject
"International Journal of Solids and Structures"
 
OR