Accession Number:

AD0692638

Title:

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

Descriptive Note:

Corporate Author:

FOREIGN TECHNOLOGY DIV WRIGHT-PATTERSON AFB OHIO

Personal Author(s):

Report Date:

1969-06-05

Pagination or Media Count:

13.0

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.

Subject Categories:

  • Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE