Numerical Modeling for Roller Leveling Process of Bimetal-Plate

Abstract

The bending stress and strain of bimetal plate during roller leveling process are studied by means of both numerical analysis and experimental verification. The results show that the calculated results are agreed fairly well with the measured data. There is a deviation between the positions of the neutral layer of strain and the geometric middle of the plate thickness. At the same time this deviation changes with the ratio of the thickness of the two metallic materials, as well as the bending degree of bimetal plate. Furthermore, the percentage of the plastic layer for each of the two metallic materials in one bent unit is different owing to the difference of their mechanical property, while the roller leveling induced residual stress decreases with the increasing number of bent units.