通过吉田-上森模型进行回弹预测和利用Jstamp进行回弹补偿的研究

考虑到由塑性应变导致弹性模量发生变化,作者为商业软件LS-DYNA专门编制了一个子程序吉田-上森模型,然后分别使用实体单元和壳单元对两个冲压件进行回弹模拟。为制造与设计的形状和尺寸相一致的冲压件,提出了回弹研究的新功能和回弹补偿算法并集成到钣金成形仿真软件JSTAMP中。最后,研究了回弹的原因和介绍了使用JSTAMP对车身底座横梁板执行回弹补偿的过程。

Springback Prediction by Yoshida-Uemori Model and Compensation of Tool Surface Using JSTAMP

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.