Modeling of Thin Sheet Blanking with a Micromechanical Approach Application of the MTS Model
The optimisation of the manufacturing process of metal sheets requires a deep
understanding of the material behaviour. In the case of thin sheet blanking, the Mechanical
Threshold Stress or MTS model (Follansbee and Kocks, 1988) is shown to be of great interest
to capture the material behaviour for a large range of strain rates. These are namely
involved during the blanking process, depending of the stroke rates and the sheet thickness.
The Mechanical Threshold Stress model is implemented in the Finite Element code
ABAQUS/Explicit. For a full simulation of the blanking process, we combined the MTS
model with a critical strain based rupture criterion. Results obtained for a OFHC copper
thin sheet are presented and discussed.
Christophe POIZAT, Christophe HUSSON, Said AHZI, Nadia BAHLOULI, Laurent MERLE
Blanking, thin sheet, MTS model, finite element simulation.