Analysis OF PLANE STRAIN ROLLING Rigid plasttic materialS using finite element Method

Abstract

In this research the rigid plastic material is applied to steady and non- steady state strip rolling .Stresses and strains distribution in steady state plane strip rolling under the condition of constant of friction are calculated for work hardening and non-hardening materials .In order to attain a comprehensive understanding of the underlying process details, to check and select semi analytical models, highly sophisticated numerical approaches, based on the method of finite elements (F.E.M), have been performed by utilizing the non-linear capabilities of both ANSYS-11 Standard and Explicit., Analytical models, (with different reduction of areas) validated against each other and calibrated with real process data, are essential to determine proper rolling setups of aluminum (according to roller diameter, distance between rollers and rolling pressure). The calculated distribution of roll pressure exhibits, a peak at the entry which does not appear in the analysis by the slab method. The transverse direction (TD) rotation angle which increases an accurate elongation control system was built, which is based on precise mathematical process models for the prediction of rolling pressure, velocity and forward slip. To improve the quality of the rolled product rolling provides a slight reduction in thickness, thereby eliminating the yield point elongation focusing on the surface elements which exhibit a compressive stress. The TD rotation angle in the rolled specimens are very small and permanent deformation due to the rolling process, these result of completed shapes are in a good agreement with the experimental ones for aluminum strip .