Sectional multi-point forming and its numerical simulation of plates

In order to resolve technique problems in sectional multi-point forming, the forming process was simulated by a finite element software, in which dynamic-explicit formulation was used to analyze the loading processes and implicit algorithm formulation for the unloading processes. The forming surface of transition area was designed by non-uniform rational B-surface (NURBS), and the width of transition area that has effect on the quality of sectional forming parts was discussed. It is shown that when simulated with an appropriate design of transition area, sectional forming parts possess a better quality than one-step forming parts.