Generalized Fatigue Diagram Under the Impact of Various Random, Harmonic and Polyharmonic Processes

Abstract

Parameters characterizing different operation loading processes of harmonic, polyharmonic, and accidental type are considered. A technique is developed which provides prediction of the fatigue resistance for the operational processes from a generalized diagram using test data obtained under harmonic loading. This eliminates the necessity of harmonic schematization of random processes using known techniques that result in significant errors in assessing the lifetime.