The objective of this study is to develop a more precise springback prediction technique by means of finite elements method for the optimization of forming process design. The approach includes a new material modeling method to calculate accurate residual stresses inherent in forming processes, and a new analytical method to calculate springback shape by releasing residual stresses in a sequence of releasing steps.This paper proposed the new analytical method in springback simulation for actual automotive components with complex shapes. A new algorism, Multi-Step-Springback method was developed to improve the accuracy of springback simulation. In order to determine the material parameter, compression-tension tests were carried out. The impact on springback results is shown. The effect of modeling a more complex material behavior is presented. The simulation using proposed material model shows good accuracy of springback prediction for hat-shape drawing, a typical cross-section for structural members.
Springback Simulation for Automotive Body Components using High Strength Steels
Sae Technical Papers
International Body Engineering Conference & Exposition ; 2003
2003-10-27
Conference paper
English
Simulation of springback variation in forming of advanced high strength steels
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