Počet záznamů: 1  

Numerical implementation of a model with directional distortional hardening

  1. 1. 0445966 - UT-L 2016 RIV US eng J - Článek v odborném periodiku
    Marek, René - Plešek, Jiří - Hrubý, Zbyněk - Parma, Slavomír - Feigenbaum, H. P. - Dafalias, Y.F.
    Numerical implementation of a model with directional distortional hardening.
    Journal of Engineering Mechanics-Asce. Roč. 141, č. 12 (2015), 04015048-04015048 ISSN 0733-9399
    Grant CEP: GA MŠk LH14018; GA ČR(CZ) GA15-20666S
    Institucionální podpora: RVO:61388998
    Klíčová slova: plasticity * directional distortional hardening * finite-element procedures
    Kód oboru RIV: JG - Hutnictví, kovové materiály
    Impakt faktor: 1.346, rok: 2015
    http://ascelibrary.org/doi/abs/10.1061/%28ASCE%29EM.1943-7889.0000954

    The presented work outlines and tests a finite-element (FE) implementation of a simple directional distortional hardening model. The evolution equations of internal variables are based on the Armstrong–Frederick evanescent memory-type hardening rule, and the associative flow rule is adopted. The directional distortion of the yield function is governed by the contraction of the backstress tensor with the so-called unit radial tensor, and incorporates a fixed scalar distortional parameter. Therefore, the variety of possible shapes of predicted subsequent yield surfaces is limited. The tangent stiffness–radial corrector method with fine subincrementation is used. This implementation is verified by comparing numerical results with analytical solutions pertinent to proportional load cases and semianalytical solutions for nonproportional loadings. The template of the whole implementation is included in the Appendix.
    Trvalý link: http://hdl.handle.net/11104/0252776