Application of Constitutive Model Considering Nonlinear Unloading Behavior for Gen.3 AHSS
Nonlinear unloading behavior has been reported as an important factor for accurate springback prediction.In this study,a newly proposed special component of strain: Quasi-Plastic-Elastic (QPE) strain was utilized to study the springback behavior of Advanced High Strength Steels (AHSS).Several types of steels,including IF steel,DP780,TRIP780,DP980,TWIP980 and QP980 were considered in this research.The results showed that all the tested steels have following behavior: 1) QPE strain is recoverable,like elastic deformation.2) It dissipates work,like plastic deformation.A 3-D constitutive model considering QPE behavior was implemented in Abaqus/Standard with shell element and applied to draw-bend springback test for Gen.3 AHSS,QP980.Predictions for springback using the QPE model were more accurate compared with standard elastic-plastic models.
Springback Draw-bend Test AHSS QPE Model Nonlinear Unloading
Li Sun R.H.Wagoner
General Motors China Science Lab,Shanghai,China Department of Material Science and Engineering,The Ohio State University,US
国际会议
沈阳
英文
440-445
2013-07-06（万方平台首次上网日期，不代表论文的发表时间）