INFLUENCE OF MATERIAL AND PROCESS PARAMETERS ON BURSTING DURING HYDROFORMING PROCESS

摘要

Bursting is predicted by using a 3D-necking criterion based on local instability analysis. The criterion is first validated building Forming Limit Diagram and the influence of material parameters is illustrated. Furthermore, the criterion is implemented in a finite element code devoted to the simulation of hydroforming processes. Bursting predictions during hydroforming process are presented and the influence of process parameters, as "pressure vs. displacement" path and die radius, is studied.