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Buckling of Unstiffened Shear Webs with Flanged Lightening Holes

Published online by Cambridge University Press:  04 July 2016

Maureen E. Michael
Maureen E. Michael*
Affiliation:
Technical Department, Royal Aeronautical Society
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Extract

Although many investigators have set out to find a method of determining the buckling and failing stresses for unstiffened shear webs with flanged or unflanged lightening holes, it seems that so far no really satisfactory method has been found.

A number of empirical and semi-empirical expressions have appeared over the years which agree closely with the limited series of tests on which they are based, but which the writer has found not to agree with the general mass of experimental data which is now available on this subject.

Following a recent examination of the available data another attempt has been made to derive some expressions or formulae that would help the designer to estimate buckling and failing stresses of such panels, and as a first step a semi-empirical formula has been derived that appears to fit the test results reasonably well for the initial buckling case. It applies to panels with edges fixed.

Type
Technical Notes
Information
The Aeronautical Journal , Volume 64 , Issue 593 , May 1960 , pp. 298 - 299
Copyright
Copyright © Royal Aeronautical Society 1960

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References

1.Kuhn, P. (1942). The Strength and Stiffness of Shear Webs with Round Lightening Holes Having 45° Flanges. N.A.C.A. A.R.R. W.R. L-323, December 1942.Google Scholar
2.Floor, W. K. G. (1953). Shear Tests on 24 S-T. Unstiffened and Stiffened Webs with Flanged Holes. Part I, N.L.L. Report S.413, July 1953.Google Scholar
3.Botman, M. (1954). Shear Tests on 24 S-T. Unstiffened and Stiffened Webs with Flanged Holes. Part 2, N.L.L. Report S.446, November 1954.Google Scholar
4.Anevi, G. (1954). Experimental Investigation of Shear Strength and Shear Deformation of Unstiffened Beams of 24 S-T Alclad with and without Flanged Lightening Holes. S.A.A.B. T.N. 29, October 1954.Google Scholar