Simulation analysis of plastic deformation and residual stress distribution of radial ring rolling

To eliminate the residual stress formed during the process of ring rolling, the radial ring rolling was simulated by elas-plastics large deformation finite element analysis. Al alloy rings with rectangular cross-section were adopted as workpieces and total depressing amounts of mandrel with different feed velocities were identical. Magnitude and distribution of plastic deformation in different feed velocity of mandrel were studied. The simulated results show that the fishtail shape coefficient is high when the feed velocity is relatively low and will be reduced with increase of feed velocity. According to the mechanism that inconsistent plastic deformation is the cause of residual stress, the corresponding residual stress distribution of radial ring rolling was analyzed. The research provides foundation for the residual stress relief study.