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하진진(Jinjin Ha),Fee deric Barlat,이명규(Myoung-Gyu Lee) 한국소성가공학회 2012 한국소성가공학회 학술대회 논문집 Vol.2012 No.5
In this study, the anisotropic hardening behavior of extra deep drawing quality (EDDQ) steel subjected to two-stage strain path changes was investigated. The experiment is designed as two-step of uniaxial tensile tests, in which specimens are pre-strained in the rolling direction (RD) followed by uniaxial tension in 0°, 45°, and 90°degrees from the RD. Stress overshooting and strain hardening stagnation were dominantly observed in the experiments, and these results were validated by the recently proposed anisotropic hardening model [I] and the kinematic hardening model by Chaboche [2].