Mechanical Reliability Confidence Limits

[+] Author and Article Information
D. Kececioglu

Aerospace and Mechanical Engineering Department, The University of Arizona, Tucson, Ariz.

G. Lamarre

National Defense Headquarters, Ottawa, Ontario, Canada

J. Mech. Des 100(4), 607-612 (Oct 01, 1978) (6 pages) doi:10.1115/1.3453977 History: Received August 01, 1977; Online October 21, 2010


Charts are presented relating the lower one-sided confidence limit on the reliability, RL1 , to the effective sample size, ne , calculated from the sample sizes used to estimate the failure governing stress and strength distributions, or f(s) and f(S) respectively, and a factor K which is a function of the estimated means and standard deviations of f(s) and f(S). These graphs cover an ne range of 5 to 1000, confidence levels of 0.80, 0.90, 0.95, and 0.99, and lower one-sided limits on the reliability of 0.85 to 0.914 5. The equations used to develop these charts are derived and two examples of their applications are given.

Copyright © 1978 by ASME
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