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Meeting NUMISHEET 2022: The 12th International Conference on Numerical Simulation of 3D Sheet Metal Forming Processes
Symposium NUMISHEET 2022
Presentation Title On Strain Hardening Modeling in Associated and Non-Associated Orthotropic Plasticity
Author(s) Jie Sheng, Mohammed Alharbi, Seung-Yong Yang, Wei Tong
On-Site Speaker (Planned) Wei Tong
Abstract Scope 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 the 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 and the differential strain hardening behavior of several 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.
Proceedings Inclusion? Definite: At-meeting proceedings


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On Strain Hardening Modeling in Associated and Non-Associated Orthotropic Plasticity
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