Numerical simulation of springback and twisting of stamped thin U-shaped copper alloy sheets with a change of the blank alignment

This study is directed to understand the origin of that difference with a numerical simulation of the process. The mechanical behaviour of the materials was investigated in tension and hydraulic bulge test, out of comparison’s sake and to derive the hardening law over a strain range representative of the process. Finite element simulations are performed using the von Mises criterion coupled with isotropic hardening, to compare the predicted forming load and springback parameters with experimental values.
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Numerical simulation of springback and twisting of stamped thin U-shaped copper alloy sheets with a change of the blank alignment