Effects of some modeling parameters of finite element models of binder forming

This paper studies the effects of some modeling parameters on the accuracy of finite element simulation in sheet-metalforming. A simple stepdie, which simulates binder forming, is used. In this two-dimensional case, a flat bl ank is bent into an S-shape, which has an exact solution. Four modeling par ameters are studied. They are: die close speed, die gap, mass damping, and width of blank. One significant finding of this study reveals that in calcu lations using explicit finite elements, the simulation speed should be sele cted with care. The dynamic effects may be Prevalent if the simulation spee d is too fast. Numerical errors may accumulate and renders the results erro neous if it is too slow.