In this paper, a new scheme for simulating the central bursting defect formation occurred during cold forward extrusion is presented. The scheme is implemented onto AFDEX 2D, based on a rigid-thermoviscoplastic finite element method. A element removal...
In this paper, a new scheme for simulating the central bursting defect formation occurred during cold forward extrusion is presented. The scheme is implemented onto AFDEX 2D, based on a rigid-thermoviscoplastic finite element method. A element removal scheme after separating or cracking the damaged neighboring elements along the element boundary is proposed. Fracture model with fracture criterion are introduced considering both cumulative damage and the maximum principal stress. The results show that more realistic shape of the chevron crack was obtained with the new criterion.