Název:
Implicit constitutive solution scheme for Mohr-Coulomb plasticity
Autoři:
Sysala, Stanislav ; Čermák, M. Typ dokumentu: Příspěvky z konference Konference/Akce: Programs and Algorithms of Numerical Mathematics /18./, Janov nad Nisou (CZ), 20160619
Rok:
2017
Jazyk:
eng
Abstrakt: This contribution summarizes an implicit constitutive solution\nscheme of the elastoplastic problem containing the Mohr-Coulomb yield cri-\nterion, a nonassociative \now rule, and a nonlinear isotropic hardening. The\npresented scheme builds upon the subdifferential formulation of the \now rule\nleading to several improvements. Mainly, it is possible to detect a position\nof the unknown stress tensor on the Mohr-Coulomb pyramid without blind\nguesswork. Further, a simplifed construction of the consistent tangent opera-\ntor is introduced. The presented results are important for an efficient solution\nof incremental boundary value elastoplastic problems.
Klíčová slova:
consistent tangent operator; implicit constitutive solution scheme; Mohr-Coulomb plasticity Číslo projektu: LQ1602 (CEP) Poskytovatel projektu: GA MŠk Zdrojový dokument: Programs and algorithms of numerical mathematics 18, ISBN 978-80-85823-67-7