Initial cyclic deformation of material in the zone of a hole with contact interaction based on data of the holographic interferometry method

Abstract

This article presents dependences of maximum local deformations at the periphery of a hole in a strip on nominal stresses at the initial stage of cyclic sign-variable aasymmetric tensile- compressive loading over a short-time fatigue range. An open hole, and holes stopped by means of washers with initial clearance and interference, which model the working of an element of a joint, are analyzed. This data was obtained for the first time by measuring the components of surface displacements using the method of holographic interferometry. A series of factors that facilitate the enhancement of operating life of elements of joints with radial interference are established and their quantitative characteristics determined.