Journal Published Online: 01 March 1984
Volume 12, Issue 2

Fitting of Fatigue Curves with Nonconstant Standard Deviation to Data with Runouts



This paper presents maximum likelihood methods and a computer program for fitting fatigue curves with nonconstant standard deviation to data with runouts. The methods yield estimates and confidence limits for curve coefficients and percentiles of the life distribution at any stress level. Also presented are (1) the likelihood ratio test for comparing the fit to data of different types of fatigue curves and (2) graphical analyses of residuals to check the assumed fatigue life distribution, to assess fit of a curve, and to spot peculiar data.

Author Information

Nelson, W
General Electric Co. Corporate Research and Development, Schenectady, NY
Pages: 9
Price: $25.00
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Stock #: JTE10700J
ISSN: 0090-3973
DOI: 10.1520/JTE10700J