USE OF THE BOUNDARY-ELEMENT METHOD TO DETERMINE THE RELATIVE STRESS GRADIENTS IN STRUCTURAL ELEMENTS

摘要

The statistical theory of fatigue damage similarity is widely used at the present time [1]. It describes the influence of the constructive factors on the parameters of the distribution function of the fatigue limits of the parts. In accordance with this theory, one of the primary factors that account for the scale effect and have a significant influence on the effective concentration factor is the relative stress gradient G = -1/σ{sub}(1max)(dσ{sub}1/dx), Where σ{sub}(1max) is the principal stress at the concentration point on the contour; x is the normal to the contour that passes through the concentration point.