ISSN: 0090-3973
Page Count: 7

An Extrapolation Method for Estimating Crack Growth Rate Confidence Intervals from Small Fatigue Crack Data

Carlson, RL
The School of Aerospace Engineering, Georgia Institute of Technology,GA,

Halliday, MD
University of Birmingham,

(Received 12 March 2001; accepted 2 January 2002)

Abstract

Small fatigue crack growth data for the aluminum alloy 6061-T651 are analyzed to obtain confidence intervals for the mean crack growth rate as a function of crack length. Results of an extrapolation procedure are presented to illustrate how variations in crack size and elapsed load cycles in the early stages of crack growth may be examined.

Keywords:
fatigue, small cracks, scatter, confidence intervals, extrapolation

Paper ID: JTE12305J
DOI: 10.1520/JTE12305J
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