Elasto-plastic finite element simulation of the flat rolling process by dynmaic explicit method

摘要

Finite element rollign analyses have bene carried out for years,and rigid-jplastic analyses are still widely used even today because of the practical computational time.A more accurate elastoplastic analysis requires much longer computational time,so it has been thought not to be practical.Recently,the dynamci explicit method (DEM) has made a success of solving sheet metal forming problems,considering the elasto-plastic behaivor of the material.In this report,we have tried to apply the DEM to a 2D elasto-plastic flat rollign simulation,and have checked the accuracy by comparing with aproximate analyticla so,lutins and static impllicit soltions.Following the successful 2D simulation,we have tried to analyze 3D rollign behavior by the DEM.For future practical 3D applicaitons,both lagrangian and ALE rollign simulations have bene performed,and each result agrees well.