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Influence of material's hardening behaviour of DP1000 on numerical springback prediction

Abstract : The aim of this paper is to show the influence of considering an isotropic or a mixed kinematic hardening model on the springback prediction of a DP1000 high strength steel. The kinematic hardening behavior of the material is characterized by experimental tension-compression test and shear test at different pre-strain levels. Then, these hardening models are implemented in a Demeri Cup test numerical simulation and compared to experimentally obtained results. In order to reproduce the real contact between the tools and the sheet, Strip Drawing tests at different contact pressures are carried out to obtain the existing pressure dependent coefficient of friction model. The material shows a clear kinematic hardening tendency and therefore kinematic hardening law achieves more accurate springback prediction compared to the isotropic hardening law. © 2016 Author(s).
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Submitted on : Tuesday, July 16, 2019 - 11:32:35 AM
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I. Gil, E. Silvestre, L. Galdos, J. Mendiguren, E. Sáenz de Argandoña, et al.. Influence of material's hardening behaviour of DP1000 on numerical springback prediction. 19th International ESAFORM Conference on Material Forming, 2016, Nantes, France. pp.200014, ⟨10.1063/1.4963632⟩. ⟨hal-02184756⟩



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