Finite element model fracture prediction during sheet-metal blanking processes

Abstract In order to accurately simulate sheet-metal cutting processes by shearing mechanisms, such as blanking and punching, we have developed a finite element model (FEM) valid for the numerical description of such processes. Damage and crack propagation have been taken into account by means of an elastoplastic constitutive law. To study the effects of varying the process parameters on the geometry of the sheared edges, and the evolution of the force-punch penetration, we have implemented a calculation algorithm by means of the user routine (UMAT) of abaqus /standard finite element code. Final results given by the FEM were compared with the experimental ones.

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