Finite strain model for contact interface in forming processes

Abstract

A phenomenological rate and state-variable friction law for the continuous sliding under lubricated and dry conditions, asit occurs in metal forming processes, is presented in this paper. The contact model is developed within the framework ofcontinuum thermodynamics of irreversible processes with internal variables and for large strains assuming the contact area asa material surface. The model reproduces the experimental boundary friction map obtained by Luengo et al [1].