The Numerical Simulation and Failure Prediction for Thick Sheet Metal Fine-Blanking Based on Oyane Damage and Fracture Model

By using DEFORM-2D software,an axisymmetric FE model was created,and the Oyane ductile fracture model,which takes into account the influence of hydrostatic stress and stress-strain history on(material) damage,was used to predict the fracture of sheet metal.Local adaptive remeshing and element-deletion technologies were used to model the initiation and propagation of crack.Through using elasto-plastic large deformation FE simulation,the distributions and developing trends of σ_m,(σ),e and damage were(predicted).The influencing laws of the process parameters on failure were analyzed by the FE simulation results which are in agreement with the experimental results.