DEFECT PREDICTION DURING CONFORM PROCESS BY FEM

On the basis of the rigid viscoplastic FEM theories, a surface defect prediction method for plastic forming process by FEM numerical simulat ion has been deeply studied in this paper. Some technical treatments a nd algorithms of defect prediction are proposed. Using this method, th e processes of defect initiation and development during CONFORM proces s are predicted successfully, and some critical technological paramete rs are obtained. Therefore, it is also an extension for application fi elds of rigid viscoplastic FEM to predict technology defect.