Investigation of Notch Root Strain Behaviors Under Combined Loadings

Abstract

Notches are the stress raiser regions. Along the notch section, not only the stress distribution becomes non-uniform, but also the stress level reaches the maximum value. These geometrical disorders can be undesirable such as casting cavity but sometimes these disorders are created deliberately for assembly process such as keyway holes or shaft steps. Because of the necessity of these notches. This is important to understand material behavior along this region. In this study, three different strain paths were generated by the cyclic tensile and torsional loadings and strains of the notch root of a shaft which contains circumferential notch, were investigated through the finite element method (FEM). MSC. Marc commercial program have been used in this study as finite element software. The results have been obtained for kinematic hardening rules and compared with the experimental results obtained from literature studies. Also in this study, a subroutine file was used to calculate the Chaboche kinematic hardening rule parameters according to Swift equation.