|About this Abstract
||NUMISHEET 2021: The 12th International Conference on Numerical Simulation of 3D Sheet Metal Forming Processes
||Loading Path Effects on Fracture Prediction during Bending Process Using GTN Fracture Criterion
||Maziar Khademi, Hossein Talebi-Ghadikolaee, Hassan Moslemi Naeini, Mohammad Javad Mirnia
|On-Site Speaker (Planned)
In this study, the Gurson-Tvergaard-Needleman (GTN) ductile fracture criterion was used to investigate the ductile fracture during the bending process of the AA6061-T6 aluminum alloy. To this aim, the GTN fracture criterion was calibrated based on various appropriate tension test and was integrated into the commercial finite element (FE) Abaqus/Explicit using an appropriate user subroutine. The calibrated model was used to predict the fracture onset during the bending process by considering various deformation conditions. Two distinct forming strategies including the single-stage and multi-stage bending process (Nonlinear Forming) were utilized. The experimental results show that the loading path has significant effect on the formability of the material. The deformation mechanics analysis shows the existence of the variation of the stress triaxiality during the process leading to forming limit fluctuation. Also, comparing the experimentally measured and numerically predicted fracture onset indicates that the proposed method leads to reliable fracture prediction results.
||Definite: At-meeting proceedings