Study on Ductility Failure of Advanced High Strength Dual Phase Steel DP590 during Warm Forming Based on Extended GTN Model

Under warm forming, the damage parameters of extended GTN model are easily affected by temperature, and failure materials under forming is less studied using this model. In paper, based on model, DP590 at different temperatures determined experiment numerical simulation, studying trend changing with temperature. Through analysis shear specimens angles temperatures, we changes in void conditions, discussing influence competitive fracture forming. We modify a function stress triaxiality, present equation considering temperature triaxiality. It found that can be applied to study steel