Material Parameter Identification and Response Prediction of Shearing Process for Flying Shear Machine Based on Model Validation

This paper studies on the simulation of a certain type of flying shear machine’s the shearing process. In the finite element simulation, chip formation and cutting ability is not only affected by the high temperature of bar itself and impact velocity of cutter, but also affected by the material itself stress-strain curve under different strain rate and fracture model. Even if the same temperature and impact velocity for high temperature bar, due to the uncertainty of different parameters under different strain rate stress-strain curves, different fracture model, different critical damage factor, the maximum shear force and shear punch depth are not the same. Therefore, in order to obtain a more accurate finite element model and response prediction, it is necessary to identify the uncertainties of the parameters for the material constitutive model and fracture criterion.