A ductile failure criterion (DFC), which defines the stretching failure at localized necking (LN) and treats the critical damage as a function of strain path and initial sheet thickness, was proposed in a previous study. In this study, the DFC is revisited to extend the model to the low stress triaxiality domain and demonstrates on modeling forming limit curve (FLC) of TRIP 690. Then, the model is used to predict stretching failure in a finite element method (FEM) simulation on a TRIP 690 steel rectangular cup draw process at room temperature. Comparison shows that the results from this criterion match quite well with experimental observations.
Modeling Forming Limit in Low Stress Triaxiality and Predicting Stretching Failure in Draw Simulation by an Improved Ductile Failure Criterion
Sae Int. J. Mater. Manf
Sae International Journal of Materials and Manufacturing
WCX World Congress Experience ; 2018
Sae International Journal of Materials and Manufacturing ; 11 , 4 ; 401-407
2018-04-03
7 pages
Conference paper
English
Predicting Forming Limit Curve Using a New Ductile Failure Criterion
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