Title: Two non-associated isotropic elastoplastic hardening models for frictional materials
Authors: Lambrecht, Melissa ×
Miehe, C #
Issue Date: 1999
Publisher: Springer-verlag wien
Series Title: Acta mechanica vol:135 issue:1-2 pages:73-90
Abstract: The paper proposes two new elastoplastic constitutive models for the description of deformation mechanisms of frictional materials which are suitable for a wide range of applications in soil mechanics. The first model provides an extension of the classical Drucker-Prager-type function in order to overcome numerical difficulties in the tensile stress range. The key idea here is the introduction of a constant perturbation-type parameter which yields a C-2-differentiable smoothing-out of the peak of the Drucker-Prager cone. We then extend this formulation to a closed single-surface model based on a decoupled description of the deviatoric and the mean stress response. Both models are equipped with a saturation-type hardening mechanism. They have proved to be very robust and successful in numerical implementations.
ISSN: 0001-5970
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Biomechanics Section
× corresponding author
# (joint) last author

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