Hot rolling of an aluminum-copper sandwich flat strip with the three-dimensional finite element method

The symmetrical rolling of 3D sandwich flat strips with a thermo-elastic-pl astic coupled model was studied under the assumption of an elastic roller a nd the consideration of heat transfer Aluminum-copper sandwich flat strips were used in this study. The effect of different functions of the flow stre ss on the strip appearance after rolling were explored. The numerical analytical model of symmetrical rolling for 3D sandwich flat strip with a thermo-elastic-plastic coupled model was developed based on th e large-deformation-large-strain theory, the updated Lagrangian formulation and the incremental principle. Further, the how stress was considered as t he function of strain, strain rate and temperature. The theoretical model o f the finite element method containing a two-order strain-rate formulation acted as the basis for determining the convergence of simulation results. Before the aluminum-copper sandwich hat strip was simulated first an alumin um-mild steel sandwich flat strip was simulated. The average rolling force of the simulation results was compared with experimental findings to establ ish that the simulation program proposed in this study is reasonable. In ad dition, the equivalent strain, and the equivalent strain rate of the alumin um-copper sandwich strip during rolling were analyzed and compared with tho se for the flat rolling of a single aluminum layer. (C) 2000 Published by E lsevier Science S.A. All rights reserved.