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2축 십자형 시편을 이용한 알루미늄 합금 판재의 항복곡면에 대한 연구
신효동(H. D. Shin),박진기(J. G. Park),박춘달(C. D. Park),노현철(H. C. Ro),윤국태(K. T. Youn),임희택(H. T. Lim),김영석(Y. S. Kim) 한국소성가공학회 2009 한국소성가공학회 학술대회 논문집 Vol.2009 No.5
The applications of the aluminum alloy sheets to the auto-body panels are dramatically increasing for weight reduction of the automobiles. However, low formability of the aluminum alloy sheet compare to the steel sheet can be obstacles in tool manufacturing process. Therefore, much of yield criteria for the anisotropic material such as the aluminum alloy sheet have been observed. In this study, the biaxial tensile test and FLD test for the aluminum alloy sheet are performed. The results are compared with Hill’s 1948 and Hill’s 1990 model by means of theoretical predictions. Finite element analysis also performed using the proposed method for the real panel.