The Solution of The Finite Element Method on Rolling Problems Qian Rengen,Zhou Baokun,Qiao Duan, 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 bet ween 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 distribu- tion,etc;and suggested New view on determining the Length of defor- med 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 quad- rilateral iso parametric element is introduced.The results of the calculat- ion have been compared with the experimental data of aluminium plate rolled on the 4-high mill. 146， ， ， 耳 一 ， 一 ， 一 ， 一 一 ， · ， 一 ， 一 一 刀 一