An Evolutionary Anisotropic Behavior for DC04 Sheet Using Hill48 Function under Non-Associated Flow Rule Hypothesis
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2022-10-28
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Abstract
analyzed
based on a quadratic Hill48 function and under the application of two plasticity approaches: associated
and non-associated flow rule approaches (AFR and NAFR, respectively). The mechanical properties
have been modeled, such as the uniaxial flow stresses () and the coefficient of anisotropy r() (or the
Lankford parameter). In the identification of anisotropic parameters, the decoupling of the two tensors
(strain and stress) under the assumption of non-associated plasticity gives better predictions compared
with the experimental. With the purpose of introducing the evolutionary anisotropic path of plastically
equivalent characteristics for the uniaxial flow stresses (), the isotropic hardening of mechanical strain
hardening function is presented using the following empirical law based on Voce model. Therefore,