Publisher : The Korean Society for Technology of Plasticity
DOI : 10.5228/KSTP.2016.25.3.189
Title & Authors
Spring-back Prediction of DP980 Steel Sheet Using a Yield Function with a Hardening Model Kim, J.H.; Kang, G.S.; Lee, H.S.; Kim, J.H.; Kim, B.M.;
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.
Spring-back;Hardening Model;Yield Function;U-bending;Advanced High Strength Steel;
S. C. Park, T. Park, Y. Koh, D. Y. Seok, T. Kuwabara, N. Noma, K. Chung, 2013, Spring-back Prediction of MS1470 Steel Sheets Based on a Non-linear Kinematic Hardening Model, Trans. Mater. Process, Vol. 22, No. 6, pp. 303~309.
D. W. Kim, S. S. Bang, M. S. Kim, H. Y. Lee, N. S. Kim, 2013, Development of Test Method for Simple Shear and Prediction of Hardening Behavior Considering the Bauschinger Effect, Trans. Korean Soc. Mech. Eng. A, Vol. 37, No. 10, pp. 1239~1249.
J. Ha, M. G. Lee, F. Barlat, 2012, Evaluation of Anisotropic Hardening Models using Two-Step Tension Tests, Trans. Mater. Process, Vol. 21, No. 6, pp. 372~377.
R. Hill, 1948, A Theory of the Yielding and Plastic Flow of Anisotropic Metals, Proc. R. Soc. Lond. A, Vol. 193, No. 1033, pp. 281~297.
F. Barlat, J. C. Brem, J. W. Yoon, K. Chung, R. E. Dick, D. J. Lege, F. Pourboghrat, S. H. Choi, E. Chu, 2003, Plane Stress Yield Function for Aluminum Alloy Sheets - Part 1: Theory, Int. J. Plast., Vol. 19, No. 9, pp. 1297~1319.
F. Yoshida, T. Uemori, 2002, A Model of Large-strain Cyclic Plasticity Describing the Bauschinger Effect and Workhardening Stagnation, Int. J. Plast., Vol. 18, No. 5-6, pp. 661~686.
C. Gomes, O. Onipede, M. Lovell, 2005, Investigation of Springback in High Strength Anisotropic Steels, J. Mater. Process. Technol., Vol. 159, No. 1, pp. 91~98.
T. Belytschko, J. I. Lin, C. Tsay, 1984, Explicit Algorithms for the Nonlinear Dynamics of Shells, Comput. Meth. Appl. Mech. Eng., Vol. 42, No. 2, pp. 225~251.
A. Aryanpour, D. E. Green, 2012, Evaluation of LS-Dyna user’s Conference, 12th Int. LS-Dyna Conf., Dynamore Gmbh, Detroit, USA.