SPRINGBACK PREDICTION BY YOSHIDA-UEMORI MODEL AND COMPENSATION OF TOOL SURFACE USING JSTAMP

Abstract

Authors programmed a subroutine of Yoshida-Uemori model to commercial software LS- DYNA considering Young's modulus change with plastic strain, and then carried out a springback simulation for two stamping parts using solid element and shell element respectively. To make a designed shape and size of a stamping part, a new function for springback reason research and an algorithm for tool surface compensation were proposed and programmed to simulation system JSTAMP. Lastly, a research for springback reason and a compensation for tool surface of underbody cross member panel were performed using JSTAMP.