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Meeting Materials Science & Technology 2019
Symposium Formability and Fracture of Metal Sheets
Presentation Title Anisotropic and Time-dependent Continuum Damage Coupled Plasticity Model for Predicting Ductile Fracture of AA 6xxx
Author(s) Mustapha Makki, Georges Ayoub, Jackie Ayoub, Andrey Linich, George Luckey, Ghassan Kridli
On-Site Speaker (Planned) Mustapha Makki
Abstract Scope An accurate characterization of the fracture strain under different stress states is essential for designing metal formed structures. General stress states may be characterized by two independent parameters; the stress triaxiality ratio and the Lode angle. When both parameters remain constant throughout the strain history, the loading is said to be proportional. In this work, the fracture surface of an AA 6xxx series sheets is constructed in the space of the equivalent plastic strain, the stress triaxiality and the Lode angle. A hybrid method combining experimental (proportional loading) and FEM simulations is used for the fracture surface calibration. The mechanical and damage behavior of ductile metal is captured using an anisotropic and time-dependent continuum damage-coupled plasticity that is implemented as user subroutine. The predictive capability of the model with embedded damage cumulative law is validated on non-proportional loading experiments.
Proceedings Inclusion? Definite: At-meeting proceedings


A Method to Predict the Ductile Fracture of Metal Sheets under Complex Plane Stress
Anisotropic and Time-dependent Continuum Damage Coupled Plasticity Model for Predicting Ductile Fracture of AA 6xxx
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