Accession Number:

AD0763776

Title:

On the Influence of the R-Ratio on Fatigue Crack Propagation,

Descriptive Note:

Corporate Author:

CONNECTICUT UNIV STORRS DEPT OF METALLURGY

Personal Author(s):

Report Date:

1973-02-01

Pagination or Media Count:

10.0

Abstract:

A model of the fatigue crack growth process based on crack opening displacement considerations has been previously applied successfully to crack growth under RO type loading. R is the ratio of the minimum to the maximum stress of a loading cycle. The present work extends the approach to include other R ratios. A comparison of experimental results indicates crack closure effects influence the crack growth behavior. A modification of the expression for crack growth to reflect crack closure is proposed. This expression is in better agreement with experiment. Author

Subject Categories:

  • Metallurgy and Metallography
  • Solid State Physics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE