Abstract
Numerical biaxial tensile tests of interstitial-free (IF) steel sheet were performed using crystal plasticity finite element method based on the mathematical homogenization method. In order to obtain quantitative simulation result, a representative volume element (RVE) describing crystallographic texture in the IF steel was constructed using crystal orientation data obtained by EBSD measurement. The material parameters of the crystal plasticity constitutive equations were identified from the experimentally obtained uniaxial true stress-true strain curves. Using the RVE and the parameters, the biaxial tensile deformation behaviors of the sheet under nine stress paths were investigated. The simulation results were validated by the experimental biaxial tensile tests with a cruciform specimen. We demonstrated that the simulated stress-strain curves showed a good agreement with the experimental results.
