|About this Abstract
||NUMISHEET 2021: The 12th International Conference on Numerical Simulation of 3D Sheet Metal Forming Processes
||An Approach to Characterize the Post Necking Behavior Based on Anisotropic Hardening
||Stefan Marth, Slim Djebien, Shinsuke Nohara , Masahiro Nishida, Hans-Åke Häggblad
|On-Site Speaker (Planned)
Aluminum lightweight parts are constantly increasing in the automotive industry. To simulate forming and crash performance with high accuracy on large deformations, reliable material data is needed. Recently a method to determine the post necking hardening behavior of sheet-metals, the stepwise-modelling-method (SMM), was presented. This method is limited to isotropic von Mises hardening which limits its possibility to characterize anisotropic sheet-metals, like aluminum.
Here, the SMM is extended by using the Hill plasticity. The novel method is applied to characterize the post necking plasticity for aluminum 5457-H111. The obtained hardening relation is evaluated by simulating tensile specimen and compared with experiments. The correlation between simulation and experiment is good. It is concluded that the extended SMM improves the accuracy of aluminum simulations. The novel approach can therefore be used to characterize the post-necking hardening of a variety of anisotropic sheet-metals and therewith contributes to improve simulations in the automotive industry.
||Definite: At-meeting proceedings