Convolute cut-edge design for a circular cup based on FEM and an analytical approach

Abstract

A convolute cut-edge design was developed for a single step cup drawing operation in order to produce an earless cup profile. An iterative procedure, based on the finite element method and a constant strain method using a new anisotropic yield function (Barlat et al., called Yld2004-18p), was used to design a convolute shape for an earless target cup height. A simplified analytical approach that relates the earing profile to r-value directionality was presented in this work. R-value directionality was included with the incompressible condition from the compressive mode at the rim. The result obtained from the iterative procedure was compared with the one from the analytical approach suggested. It is proven that both Yld2004 model and the simplified analytical method provide an accurate prediction of the convolute cut-edge shape. © 2007 American Institute of Physics.