2D asperity deformation of stainless steel strip in cold rolling

A sequential fluid-structure weak coupling approach is developed in order to compute the deformation of 2D asperities in mixed lubrication regime. The cold rolling model involves the strip with its asperities, the lubricant and the working roll. Reynolds equations are solved at the asperity level and lead to the evaluation of the fluid pressure acting on the asperity sides. Then solid finite element models, where the top of the asperity are in contact with the working roll and the fluid pressure is applied on asperity sides, are performed. Reynolds solving and finite element computations are performed on an asperity, from the entry to the exit of the roll bite. The methodology is applied to quantify effect of shot blasting on asperity flattening.