A modified kinematically admissible velocity field for upper bound solution of flat ring rolling

In this paper, a modified kinematically admissible velocity field for flat ring rolling process has been derived. This new formulation was used to predict the upper bound on power. In order to verify the theoretical results, an experimental rolling rig was equipped in the School of Mechanical Engineering at University of Tehran. Moreover, FEM simulations were also conducted in order to validate the developed models. Comparison of the present upper bound results with experimental study, finite element simulation and our previous slab analysis, showed good agreement and hence demonstrated the capabilities of the new formulation presented here.

Keywords:

Upper bound method , Ring rolling , Experiment , Finite element method