Numerical Analysis on Influence of Various Parameters and their Interactions on Drawability of Cylindrical Cups

Deep drawing is a complex process that is influenced by various parameters like tooling configurations, blank configurations, material properties, and forming conditions. Limit Drawing Ratio and limit strains are two parameters to indicate the draw ability of the material. In this paper, the effect of various parameters like die and punch corner radii, clearance, blank holding force, friction coefficient between die and punch, punch diameter on limit drawing ratio is investigated and presented by using an explicit finite element code LSDYNA 3D. The model is validated by comparing force obtained by the existing experimental setup with the one obtained with simulation. Initial estimation of the effect of the parameters listed above and their interactions is found out by using two levels L8 orthogonal array. After identifying the most effective parameters, their effect on the LDR is studied and presented.