Formability evaluation of coated steel sheet and uncoated steel sheet with consideration of friction characteristic

도금강판과 무도금강판의 마찰특성을 고려한 성형성 평가

Recently the usage of galvanealed steel sheet was increased in order to protect corrosion in automobile industry. So, the alternative of steel sheet was investigated in a point of formability. Generally it was known that uncoated steel sheet has better mechanical properties than coated steel sheet. But, contrary results were sometimes occurred in workplace. This reason is the effect of friction. In this study, the formability of steel sheet considering friction characteristics was investigated with tensile test, cup drawing test and finite element method.