Secondary elastic crack tip stresses which may influence very slow fatigue crack growth-additional results

For near threshold fatigue crack growth rates, a high sensitivity to stress field analysis is often displayed. For example, the partial closure or adjusted compliance ratio (ACR) methods are required to obtain the best correlation of data. This paper presents additional results on secondary crack tip stress field terms, which may be of interest for more fully representing the elastic stress field results for various configurations. Several new configurations are treated including dislocation effects, concentrated force circumstances (useful for Green's Functions), and periodic arrays of cracks. These results may be used to go beyond T-stresses in analyzing behavior.