Accession Number:

ADA038070

Title:

An Interpolative Model for Elevated Temperature Fatigue Crack Propagation

Descriptive Note:

Final rept. 3 Feb 1975-31 Jul 1976 on Phase 1

Corporate Author:

PRATT AND WHITNEY WEST PALM BEACH FL GOVERNMENT PRODUCTS DIV

Report Date:

1976-11-01

Pagination or Media Count:

39.0

Abstract:

A flexible alternative to the familiar Paris equation has been developed for the interpolative analysis of elevated temperature fatigue crack propagation data. The model is based on the hyperbolic sine equation, logda dn C1 sinh C2log delta K C3 C4, and the coefficients are shown to be simple functions of test frequency, stress ratio, and temperature. This methodology has been successfully used to describe crack propagation characteristics of selected nickel-base, titanium, and steel alloys.

Subject Categories:

  • Theoretical Mathematics
  • Mechanics

Distribution Statement:

APPROVED FOR PUBLIC RELEASE