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

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WCX World Congress Experience
Authors Abstract
Content
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.
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DOI
https://doi.org/10.4271/2018-01-0801
Pages
8
Citation
Sheng, Z., and Mallick, P., "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. 11(4):401-407, 2018, https://doi.org/10.4271/2018-01-0801.
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Publisher
Published
Apr 3, 2018
Product Code
2018-01-0801
Content Type
Journal Article
Language
English