Abstract: On the condition of plane strain it is assumed that the workpiece is a rigid-plastic material with strain hardening, the roller is a rigid-body,the frictional condition of the contact surface between the roller and the workpiece is no slip i.e. no relative slide between them.We have used the rigid-plastic finite element method to calculate the pressure per unite area,the velocity of metal flow and the stress-strain distribution,etc; and suggested New view on determining the Length of deformed arc, the rigid-plastic boundaries, the coefficient of front slide and the neutral angle.
The computer programme of the finite element method is based on the general rigid-plastic variational principles. The 8-nodal curved quadrilateral isoparametric element is introduced. The results of the calculation have been compared with the experimental data of aluminium plate rolled on the 4-high mill.