The results of an investigation suggest that, for the various forms of compound-loading investigated, i.e.: (1) All other variables except stress level maintained constant; (2) all other variables except temperature maintained constant; and (3) both stress and temperature level varied, fatigue life is predicted with acceptable accuracy by a linear cumulative damage rule. Test were carried out in the controlled stress mode in rotating bending fatigue machines. Because of the inherent variability of the material, the ability of a linear cumulative damage rule to predict compound-loading fatigue life is assessed over a range of probability of failure levels. The results indicate that there is reasonable probability that the cumulative cycle ratio at failure will be equal to or greater by a acceptable amount than unity.

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  • Accession Number: 00080639
  • Record Type: Publication
  • Report/Paper Numbers: Proc. Paper 10730
  • Files: TRIS
  • Created Date: Feb 11 1975 12:00AM