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최의근(E. K. Choi),이상욱(S. W. Lee) 한국소성가공학회 2009 한국소성가공학회 학술대회 논문집 Vol.2009 No.5
In this study, the repetitive loading-unloading tensile tests with AZ31B magnesium sheet metal have been conducted under various elevated temperatures to check out how the Young’s moduli of the sheets evolve during the plastic deformation. The loading-unloading tests have been carried out at every 1% of strain increment. With the tested results, some damage parameters of magnesium sheets based on the Lemaitre’s continuum damage theory could be calculated at room temperature, 100℃, 150℃, and 250℃. It has been shown that the critical damage parameters obtained in all temperature conditions are within the range of 0.12 to 0.18.