Model of plastic strain of material on a free surface of cylindrical patterns during axial-symmetric compression. Part 2. Definition of accumulated strain and intensity of logarithmic stains on the basis of different approximations

Abstract

The problem of accumulated strain’s definition under conditions of complex strain which occurs on a free lateral surface during axial-symmetric compression of cylindrical patterns under different conditions of friction at the end faces is considered in details. The analytical expressions for accumulated strain’s and logarithmic stain’s intensity definition on the basis of different approximations of dependence between axial and round logarithmic strains is obtained. The comparative analysis of obtained dependences is suggested, as well as information technologies intended for definition of deformed state of material on free lateral surface of cylindrical patterns during axial-symmetric compression are developed.