Springback Analysis for the Stamping of an Automotive Part with High Strength Steel Sheet
The study of springback analysis of 440MPa high strength steel is investigated in this paper.Because of the springback phenomenon is related to the material properties and the deformation mechanism during the forming process,the material properties of 440MPa high strength steel are studied at first.The material properties of 440MPa high strength steel are obtained by conducting cyclic uniaxial tension-compression tests with different strain ranges.In order to apply the material properties obtained from the experiments to the finite element analysis,the material constants required in the Yoshida-Uemori model (Y-U model) with the Bauschinger effect considered are established.For realizing the springback characteristics of 440MPa high strength steel,the U-hat draw-bending and V-shape bending are examined by the finite element analysis.From the simulation results,it finds that the side wall curl phenomenon occurs in the U-hat drawbending and the springback phenomenon appears in the V-shape bending.Moreover,it also shows that the side wall curl phenomenon and springback phenomenon are more obvious in the finite element simulations with the Bauschinger effect considered.Finally,the validation of springback prediction is performed by stamping an engine hood reinforcement with 440MPa high strength steel sheet.From the stamping results,it shows that the simulation results of springback prediction are in a well agreement to the production part data.It also finds that the springback predictions are more accurate by the finite element simulations with the use of the Y-U model.It is also found that for a stamping part which is subjected to a reversed tension-compression deformation in the forming process,the occurrence of the Bauschinger effect is obvious.It is also concluded that the accuracy of springback prediction can be much improved by the use of material model with the Bauschinger effect considered.
Springback high strength steel Yoshida-Uemori model Bauschinger effect finite element analysis
Tzu-Hao Hung Heng-Kuang Tsai Chih-Kai Chang Yu-Hung Hsu Fuh-Kuo Chen Kuo-Hsin Chung
Department of Mechanical Engineering,National Taiwan University,Taipei,Taiwan Product Application Research Section,Iron & Steel Research & Development Department,China Steel Corp Gordon Auto Body Parts Corporation,Taoyuan,Taiwan
国际会议
沈阳
英文
785-790
2013-07-06（万方平台首次上网日期，不代表论文的发表时间）