Effect of strain mode and blank orientation on waviness for paint appearance of automotive outer panels

Abstract Paint appearance is an important requirement for outer automobile panels. Since the last decade automotive manufacturers started reducing paint thickness to address environmental concerns. As a result, surface roughening of steel substrate due stamping becomes critical factor appearance. Although much research work has been conducted on roughening, limited focused waviness and conditions in pressing highly formable sheet steels. In this work, effect strain mode blank orientation evolution investigated. It was found that strong influence waviness, addition magnitude. Also, relative applied major direction roughness profile rolling affects waviness. When compared at same strain, highest equibiaxial stretch, followed by plane tension direction, then transverse diction. plotted against stretched highest, independent measurement direction. The stretching almost as