Distortional hardening concept for modeling anisotropic/asymmetric plastic behavior of AZ31B magnesium alloy sheets
作者： J. Lee , S.-J. Kim , Y.-S. Lee , J.-Y. Lee , D. Kim
DOI: 10.1016/J.IJPLAS.2017.02.002
关键词:
摘要: Abstract A continuum-based approach for describing the plastic hardening behavior of magnesium alloy sheets subjected to non-proportional strain path changes at room temperature is presented. The constitutive model based on an anisotropic distortional yield function that combines a stable component and fluctuating component. initiates criterion characterizes typical strength differential (SD) effect between tension compression in alloys temperature. evolution reformulated its cubic metal counterpart represent deformation alloys, which consists slip- twinning-dominant modes. To validate proposed model, predictor–corrector numerical algorithm was implemented finite element (FE) program by using user material subroutine, accuracy evaluated iso-error map analysis. Comparison experimental simulated results obtained various loading showed that, although not formulated kinematic concept, could reproduce complex features stress–strain responses AZ31B sheet under paths, i.e., asymmetric compression, sigmoidal nature curve during monotonic followed tension.
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