|About this Abstract
||NUMISHEET 2022: The 12th International Conference on Numerical Simulation of 3D Sheet Metal Forming Processes
||Anisotropic Time-dependent Continuum Damage-coupled Plasticity Model for Predicting Ductile Fracture of 6xxx Series Aluminum Alloys
||Georges Y. Ayoub, Mustapha Makki, Andrey Ilinich, Ghassan Kridli
|On-Site Speaker (Planned)
||Georges Y. Ayoub
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.
||Definite: At-meeting proceedings