Effect of sheet anisotropy on the wear in deep-drawing process of a cylindrical cup

In the present investigation, the deep-drawing process of a cylindrical cup is simulated using the finite element method, with the aim of investigating the effect of sheet anisotropy on wear depth in the die which is exposed to the most severe tribological condition in this process. Both the blank and the die are assumed to be deformable. For the blank, the elasto-plastic behavior is considered, while the die material is assumed to be elastic. The sheet is anisotropic, so Hill quadratic yield criterion is employed. Two kinds of anisotropy, i.e. planar anisotropy and normal anisotropy are considered in this study. To study the effects of sheet anisotropy on the wear depth on the die shoulder qualitatively a parameter called relative wear depth (RWD) is introduced. Different distributions of Lankford coefficients are chosen and several conclusive results are presented.