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Instability of Integral Panels

Published online by Cambridge University Press:  28 July 2016

S. Kelsey
S. Kelsey*
Affiliation:
Imperial College
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Extract

In a recent articlein the Journal Dr. Syed Yusuff complains of a lack of “analytical work on compression panels of integral construction … . to provide an insight into the mechanism of the various instabilities involved and also to enable the designer to evaluate its advantages more precisely.” It may therefore be pertinent to point out that there is no fundamental difference between the modes of instability of integral panels and those of conventional panels with riveted or bonded stringers, except in so far as certain modes such as inter–rivet buckling cannot arise. Consequently the analyses discussed by Argyris and Dunne in the Handbook of Aeronautics and the more recent paper by Argyris on flexure-torsion panel failure are immediately applicable to integral panels; indeed with an enhanced degree of accuracy due to the monolithic character of the integral panel. Thus, such uncertain factors as the rivet stiffness need no longer be considered. In fact, in the last mentioned paper the analysis is illustrated by application to an integral panel with flanged stiffeners.

Type
Technical Notes
Information
The Aeronautical Journal , Volume 59 , Issue 538 , October 1955 , pp. 699 - 701
Copyright
Copyright © Royal Aeronautical Society 1955

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References

1. Yusuff, Syed (1954). Primary Instability of a Panel of Integral Construction with Unflanged Stiffeners. Journal of the Royal Aeronautical Society, Vol. 58, No. 528, p. 808. December 1954.CrossRefGoogle Scholar
2. Argyris, J. H. and Dunne, P. C. (1952). Handbook of Aeronautics, Vol. I—Structural Principles and Data. Part 2—Structural Analysis. Pitman and Royal Aeronautical Society, 1952.Google Scholar
3. Argyris, J. H. (1954). Flexure Torsion Failure of Panels. Aircraft Engineering, Vol. XXVI, No. 304, p. 174, June 1954, and No. 305, p. 213, July 1954.Google Scholar
4. Levy, Samuel and Kroll, Wilhelmin D. (1948). Primary Instability of Open Section Stringers Attached to Sheet. Journal of the Aeronautical Sciences, Vol. 15, October 1948.Google Scholar
5.Ratzersdorfer (1936). Die Knickfestigkeit von Staben und Stabwerken. Springer, p. 150, 1936.CrossRefGoogle Scholar
6. Catchpole, E. J. (1954). The Optimum Design of Compression Surfaces having Unflanged Integral Stiffeners. Journal of the Royal Aeronautical Society, Vol. 58, No. 527, p. 765. November 1954.CrossRefGoogle Scholar