|About this Abstract
||NUMISHEET 2021: The 12th International Conference on Numerical Simulation of 3D Sheet Metal Forming Processes
||Prediction of Ductile Fracture in Bainitic Steel with Dependence on Stress States and Loading Orientation
||Fuhui Shen, Sebastian Münstermann, Junhe Lian
|On-Site Speaker (Planned)
The influence of stress states and loading direction on ductile fracture of high-strength steels is investigated through a hybrid experimental and numerical approach. The experimental characterization of ductile fracture is carried out by performing tensile tests at room temperature along three different directions on flat specimens, including central hole, notched dog bone, plane strain and shear. The fracture behavior under the equi-biaxial tension state is captured through the bulge test. The anisotropic plastic flow behavior is described by an evolving non-associated plasticity model, capable of representing the anisotropic hardening and evolution of Lankford coefficients. The evolving anisotropy is integrated into a damage mechanics model and further used for the numerical prediction of the stress state and loading orientation dependence of ductile fracture behavior. Different strategies, such as linear transformation and scaling approach, have been adopted to formulate a unified ductile fracture criterion independent of loading orientation.
||Definite: At-meeting proceedings