Browse Publications Technical Papers 2018-01-0801
2018-04-03

Modeling Forming Limit in Low Stress Triaxiality and Predicting Stretching Failure in Draw Simulation by an Improved Ductile Failure Criterion 2018-01-0801

A ductile failure criterion, which defines the stretching failure at localized necking and treats the critical damage as a function of strain path and initial sheet thickness, was proposed in previous study. In this study, the ductile failure criterion is revisited to extend the model to the low stress triaxiality domain and demonstrates on modeling forming limit curve of TRIP690. Then the model is used to predict stretching failure in a FEM simulation on a TRIP690 steel rectangular cup draw process at room temperature. Comparison shows that the results from this criterion match quite well with experimental observations.

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