Accession Number:

ADA014359

Title:

Reliability Assessment of Aircraft Structures Based on Probabilistic Interpretation of the Scatter Factor

Descriptive Note:

Final rept. 1 Sep 1973-1 Mar 1975

Corporate Author:

FREUDENTHAL (ALFRED M) CHEVY CHASE MD

Personal Author(s):

Report Date:

1975-04-01

Pagination or Media Count:

58.0

Abstract:

The scatter factor S as used in fatigue design of aircraft is defined as the ratio between the location parameter estimate of the population of all aircraft, obtained from n full-scale tests, and the first failure in a fleet of m aircraft. Introducing the Third Asymptotic distribution of smallest values for the fatigue life of the population, this definition produces a Pareto-type distribution of the scatter-factor, on the basis of which S can be related to the numbers n and m and the reliability level R. Tables of S for different combinations of n, m, R and the minimium fatigue life are evaluated. Useful values of the scatter factor for different materials and purposes are suggested.

Subject Categories:

  • Aircraft

Distribution Statement:

APPROVED FOR PUBLIC RELEASE