抄録
Recently, aluminum alloys are widely used for automobile applications. During forming of aluminum parts, rupture or cracking are sometimes occurred and it is necessary to predict those failures by numerical simulations. Extended Mohr-Coulomb criterion successfully predicted ductile fractures of metals and the calibration scheme of parameters in extended Mohr-Coulomb criterion has been developed. However, the shape of calibration specimens are very complicated and simpler test technique is necessary. In this paper, simple test specimens are proposed, those are based on JIS No.5 tensile specimen to make biaxial stress state or shear stress state around fracture points. Then, we applied proposed test specimens to evaluate extended Mohr-Coulomb ductile fracture criteria for Aluminum alloy A5052-H32.
