Accession Number : AD0692638

Title :   DETERMINATION OF THE FATIGUE LIMIT IN THE CASE OF AN ASYMMETRICAL STRESS CYCLE,

Corporate Author : FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s) : Nezhentsev,P. I.

Report Date : 05 JUN 1969

Pagination or Media Count : 13

Abstract : The paper discusses the complications involved in predicting fatique life on the basis of tests or observations to establish S-N relationships. The various formulas proposed in the literature for calculating the fatigue limit under symmetric and asymmetric cyclic loading are reviewed and compared with experimental data. A convenient method is proposed for constructing a simplified maximum stress diagram and a general expression is given for the fatigue limit. A comparison between experimental data and the results given by this formula shows a divergence of 1.5-6 percent. In using thses formulas, it is sufficient to know the tensile strength of the material and the fatigue limit in the case of a symmetric stress cycle, i. e. figures which may be found in the reference literature.

Descriptors :   (*FATIGUE(MECHANICS), EQUATIONS), FAILURE(MECHANICS), LIFE EXPECTANCY, STRESSES, LOADS(FORCES), USSR

Subject Categories : Solid State Physics

Distribution Statement : APPROVED FOR PUBLIC RELEASE