Abstract
In rate-independent associated plasticity, the flow surface in stress space is identical to the yield surface given by a yield stress function. Two distinct stress functions are however needed in non-associated plasticity to specify the yield surface and the flow surface separately. In this study, we explore the possibility of modeling strain hardening in metal plasticity by a new equivalent stress function that may be different from both yield and flow stress functions. As an initial effort, we consider all stress functions to be quadratic and orthotropic to describe either isotropic or differential strain hardening behaviors of rolled sheet metals under plane stress. The advantages and limitations of using an independent equivalent stress function for strain hardening modeling in sheet metal plasticity are discussed.
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© 2022 The Minerals, Metals & Materials Society
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Sheng, J., Alharbi, M., Yang, SY., Tong, W. (2022). On Strain Hardening Modeling in Associated and Non-Associated Orthotropic Plasticity. In: Inal, K., Levesque, J., Worswick, M., Butcher, C. (eds) NUMISHEET 2022. The Minerals, Metals & Materials Series. Springer, Cham. https://doi.org/10.1007/978-3-031-06212-4_34
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DOI: https://doi.org/10.1007/978-3-031-06212-4_34
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