Theory of the gradual accumulation of fatigue damage in metals under proportional cyclic loading

Abstract

The paper provides system of hypotheses about the development of defects in metals at micro, meso and macro levels (such as fragile micro- and macro-cracks) under arbitrary proportional (simple) cyclic loading. The system is formulated on the basis of extensive experimental and theoretical material about fatigue failure of metals and metal alloys. For uniaxial loading the symmetrical correlations of phenomenological model of brittle fatigue loading of metals are written. The correlations cover the entire process step by step with the release of a typical state - the type of defect.

Keywords

proportional cyclic loading / fragile fatigue micro and macro cracks / damage / durability / fatigue curve

RIGHTS & PERMISSIONS

Zavoyilichinskaya E.B.