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Design Criterion for Fatigue of Wings

Published online by Cambridge University Press:  28 July 2016

P. B. Walker
P. B. Walker*
Affiliation:
Royal Aircraft Establishment
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Extract

Exactly what constitutes a design criterion is a matter on which there may well be differences of opinion. For practical purposes design criteria may be taken to be empirical numerical rules to aid the designer in forming his initial conception of a design. The formulation of such rules for aircraft fatigue is still a matter of some difficulty. Not only is the subject of aircraft structural fatigue still in its infancy, but its study has to be linked with systematic experiment in a somewhat unusual way.

In the criteria described in this paper, the structure has first to be subjected to a standardised laboratory test. This test is itself a gross simplification since it has to represent in a rough way a diversity of conditions occurring in flight.

Type
Research Article
Information
The Aeronautical Journal , Volume 57 , Issue 505 , January 1953 , pp. 12 - 18
Copyright
Copyright © Royal Aeronautical Society 1953

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References

Note on Page 13 * This suggestion is due to W. A. P. Fisher.

Note on Page 15 * This effect is additional to the effect of speed on gust frequency discussed in Section 5.

Note on Page 17 * The analysis of gust data is to be fully described in a paper by J. Taylor, of the R.A.E., probably as an A.R.C. Report.

Note on Page 18 * The adjective “ effective ” has normally to be used instead of the more appropriate word “equivalent” because this is already in established use for denoting the equivalent ground-level (or “ indicated ”) velocity.