Calibration of a simple directional distortional hardening model for metal plasticity

INTERNATIONAL JOURNAL OF SOLIDS AND STRUCTURES

卷:143

Article

Parma, Slavomir^1,2  Plesek, Jiri¹  Marek, Rene¹  Hruby, Zbynek¹  Feigenbaum, Heidi P.³  Dafalias, Yannis F.^4,5 

[1] Czech Acad Sci, Inst Thermomech, Dolejskova 1402-5, Prague 18200, Czech Republic

[2] Czech Tech Univ, Fac Mech Engn, Tech 4, Prague 16607, Czech Republic

[3] Northern Univ Arizona, Dept Mech Engn, POB 15600, Flagstaff, AZ 86011 USA

[4] Univ Calif Davis, Dept Civil & Environm Engn, Davis, CA 95616 USA

[5] Natl Tech Univ Athens, Fac Appl Math & Phys Sci, Zografos 15780, Greece

关键词: Plasticity;    Hardening;    Constitutive laws;    Yield surface;    Calibration;   

DOI  :  10.1016/j.ijsolstr.2018.02.037

来源: Elsevier

【 摘 要 】

Directional distortional hardening (DDH) is the change of shape of the yield surface such that a region of high curvature develops roughly in the loading direction while a region of lower curvature develops in the opposite direction. In this paper, a simple model of DDH involving six material parameters is calibrated by analytical means. Analytical integration results in equations for the stress-strain curve, the hysteresis loop and the cyclic stress-strain curve inherent to the model. Based on these curves, two calibration procedures for model's parameters are proposed, and consequent analysis shows some basic properties of the model. The first calibration procedure is suited to model monotonic loading whereas the second one is suited to model cyclic loading cases. (C) 2018 Elsevier Ltd. All rights reserved.

【 授权许可】

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