Fatigue Reliability Functions in Semilogarithmic Coordinates

[+] Author and Article Information
V. A. Avakov

Otis Engineering Corporation, 1000 W. Crosby Rd., Carrollton, TX 75006

J. Mech. Des 113(3), 352-358 (Sep 01, 1991) (7 pages) doi:10.1115/1.2912789 History: Received June 01, 1990; Online June 02, 2008


In the previous publication [2], the transformation between fatigue life and strength distribution was established using double-logarithmic coordinate system (InN-InS). Here, a similar transformation is established using a semilogarithmic (InN-S) coordinate system. It is assumed that the set of S = Sj (N/Qj ) (j = 1,2,...,p) relations, plotted in the InN-S coordinates, becomes a family of parallel straight lines. With the aid of the developed orthogonal relations, lognormal, Weibull and three-parameter logweibull life distributions have been transformed into normal, asymptotic type 1 of smallest value, and three-parameter Weibull strength distributions, respectively. This procedure may be applied to other types of fatigue life distribution.

Copyright © 1991 by The American Society of Mechanical Engineers
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