抄録
6000 series aluminum alloy sheets have been widely used for automobile body. However, since the aluminum alloy sheets generally exhibit lower formability than steel sheets, wrinkling and buckling are often occurred during plastic forming process. Therefore, it is essential to predict plastic deformation behavior and formability of the aluminum alloy sheets by finite element simulation. In this study, the crystal plasticity finite element simulation was used for investigating plastic deformation behavior of 6000 series aluminum alloy sheet during hole expansion test. In order to perform quantitative simulations, the crystal orientation data used for the simulation was obtained by EBSD measurement. The material parameters of the crystal plasticity constitutive equations were identified on the basis of the experimentally obtained uniaxial stress-strain curves. The simulation results demonstrated that the crystal plasticity finite element simulation was useful for analyzing plastic deformation of the sheets and the crystal rotation during the hole expansion process.
