Non-linear finite element analysis of springback

Abstract

The non‐linear finite element method is employed to investigate the complicated, springback behaviour of doubly curved, titanium, sheet metal parts that are formed with reconfigurable tooling. The results of laboratory experiments confirm the predicted phenomena and the accuracy of the finite element simulations. To measure the magnitude of springback, the average normal distance quantity is proposed. Using this, the results of a parametric study with the non‐linear finite element method on the magnitude of springback are presented, which follow the general trends predicted for simpler parts by elasto–plastic beam theory. Copyright © 1999 John Wiley & Sons, Ltd.

Numerical simulation for the multi-point stretch forming process of sheet metal

“…The numerical simulation of flexible discrete-die forming is more sophisticated than that of the traditional stamping because of discontinuous contacts generated at MPF. Kutt (Kutt et al, 1999) and Socrate (Socrate and Boyce, 2001) presented a so-called "equivalent smooth die model" to determine the optimal shape reconfigurable tooling, and investigated the springback behavior of doubly curved sheet metal parts using non-linear finite element methods. In the authors' previous papers, matched-die MPF processes of sheet metal were numerically analyzed.…”