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Implicit constitutive solution scheme for Mohr-Coulomb plasticity

Sysala, Stanislav, Čermák, Martin (2017)

Programs and Algorithms of Numerical Mathematics

This contribution summarizes an implicit constitutive solution scheme of the elastoplastic problem containing the Mohr-Coulomb yield criterion, a nonassociative flow rule, and a nonlinear isotropic hardening. The presented scheme builds upon the subdifferential formulation of the flow rule leading to several improvements. Mainly, it is possible to detect a position of the unknown stress tensor on the Mohr-Coulomb pyramid without blind guesswork. Further, a simplified construction of the consistent...

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