PRESSURE ROLLING-CONTACT - STEADY-STATE FLOW-ANALYSIS AND COMPARISON WITH EXPERIMENTAL-DATA

In the present work the pressure rolling treatment has been modelled b y a direct stationary method which gives the stabilized mechanical sta te after complete rolling. One important input to the model is the pre ssure distribution at the contact between the roller and the sample. D ue to the conforming geometries of the bodies in contact it is found t hat the pressure distribution differs from the one calculated with the Hertz theory. The numerical outputs from the pressure rolling model h ave been compared to experimental data, i.e. the residual stresses mea sured by X-ray diffraction. A good agreement between experimental and numerical results is obtained for the penetration depth and the residu al stress profile. It is found that friction has a strong influence on the surface residual stress. Copyright (C) 1996 Elsevier Science Ltd