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Spring-back Prediction of DP980 Steel Sheet Using a Yield Function with a Hardening Model

항복함수 및 경화모델에 따른 DP980 강판의 스프링백 예측

  • Received : 2016.03.03
  • Accepted : 2016.05.10
  • Published : 2016.06.01

Abstract

In the current study, spring-back of DP980 steel sheet was numerically evaluated for U-bending using a yield function with a hardening model. For spring-back prediction, two types of yield functions - Hill'48 and Yld2000-2d - were considered. Additionally, isotropic hardening and the Yoshida-Uemori model were used to investigate the spring-back behavior. The parameters for each model were obtained from uniaxial tension, uniaxial tension-compression, uniaxial tension-unloading and hydraulic bulging tests. The numerical simulations were performed using the commercial software, PAM-STAMP 2G. The results were compared with experimental data from a U-bending process.

Keywords

Spring-back;Hardening Model;Yield Function;U-bending;Advanced High Strength Steel

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