New initial solution estimation method for inverse approach

A new initial solution estimation method for inverse finite element approach is proposed. One of the advantages of the inverse finite element approach is that it can rapidly predict the formability of final parts during the early design phase, but there exist many flange and concave areas on the final parts usually. At present, there is quite a number of initial guess methods base on projection algorithm and they are helpless for these undercut issues. In order to deal with the overlap issues, a new initial guess method is considered based on energy model which has been proven to be robust and efficient when dealing with these questions. Furthermore, the new initial guess method also makes inverse finite element method applicable to progressive die field.