Metal forming simulation - Numerical efficiency in rolling processes - part II

The numerical simulation of metal forming processes approximated by means o f finite element techniques, require large computational effort, which cont radicts the need of interactivity for industrial applications. This work an alyses the computational efficiency of algorithms combining elastoplasticit y with finite deformation and contact mechanics, and in particular, the opt imum solution of the linear systems to be solved through the incrementalite rative schemes associated with non linear implicit analysis. A method based on domain decomposition techniques especially adapted to contact problems is presented, as well as the improved performance obtained in the applicati on to hot rolling simulation as a consequence of bandwidth reduction and th e differentiated treatment of subdomains along the non linear analysis.