Evaluation of Effective Paramters on Formability of TWB

Formability of automotive friction stir welded TWB (tailor welded blank) sheets was numerically investigated in biaxial stretching based on hemispherical dome stretch (HDS) test for four automotive sheets, aluminum alloy 6111-T4, 5083-H18, 5083- O and DP590 steel, with one or two different thicknesses. Weld zone modeling approach effect and thickness ratio effect on formability was evaluated. For numerical simulations, mechanical properties were utilized according to Chung et al [11] experiments. To represent the mechanical properties, respectively, von-Mises and Hill’48 quadratic yield functions was used for comparison of isotropic and anisotropic behavior of sheets along with the (full) isotropic hardening while the anisotropy of the weld zone was ignored for simplicity and compared with experimental results.

Keywords:

TWB , HDS , Anisotropic , Forming , FSW