The characteristics of coaxial and non-coaxial strain paths

Abstract

In manufacturing processes involving large strains, the properties of the material undergoing deformation depend not only on the current total strain but on the previous strain path as well. Strain paths are divided into two major types, those in which the principal axes of strain remain fixed with respect to the material (coaxial strain paths), and those in which they rotate (non-coaxial strain paths). The characteristics of the two types of strain path are explained. Particular types of non-coaxial strain path related to practical applications are discussed in further detail and examples based on actual measurements are given.