Comparison between implicit and explicit FE models for simulation of hot rod rolling

The objective of this paper is to compare implicit and explicit FE approaches for the simulation of the hot rod rolling process. This research has been focused especially on the evaluation of bar geometrical feature after rolling. Dierent FEM codes have been used: implicit time integration by MARC Autoforge and explicit time integration code by LS-DYNA. Particular attention has been paid for the prediction of bar's spread, cross sectional prole and area contraction ratio. Numerical results have been compared against experimental data to discuss the applicability, the accuracy and the eciency of these approaches for hot rolling process simulation by numerical techniques.