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A design space representation of stiffened shear webs

Published online by Cambridge University Press:  04 July 2016

A. Rothwell
A. Rothwell*
Affiliation:
College of Aeronautics, Cranfield Institute of Technology
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Extract

A stiffened shear web, consisting of a thin plate (referred to simply as the web) attached to longitudinal members (or flanges) and supported by a series of transverse stiffeners, buckles in a mode involving both the web and stiffeners, at a shear stress which also depends on the restraint between the web and flanges. With increasing stiffener size changes in the mode of buckling occur until, at a certain critical value of the flexural stiffness of the stiffener, buckling is largely confined to the web between stiffeners, and the buckling coefficient is then practically constant. The buckling coefficient reduces to that of an unstiffened flat plate with decreasing stiffener size.

Engineering Sciences Data Item 02.03.02 plots buckling coefficients for long shear webs with uniform, equally-spaced stiffeners. The curves are based on work by Stein and Fralich, for stiffeners of zero torsional rigidity and simply-supported longitudinal edges, and on a more recent series of papers by Cook and Rockey (listed in the Data Item) which extend the analysis to clamped, as well as simply-supported, webs and also include the torsional rigidity of the stiffeners.

Type
Technical Notes
Information
The Aeronautical Journal , Volume 82 , Issue 812 , August 1978 , pp. 358 - 363
Copyright
Copyright © Royal Aeronautical Society 1978 

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References

1. ESDU. Flat panels in shear. Buckling of long panels with transverse stiffeners. Engineering Sciences Data Item 02.03.02, Structures Sub-series, Vol 10.Google Scholar
2. Stein, M. and Fralich, R. W. Critical shear stress of infinitely long, simply supported plate with transverse stiffeners. NACA Tech Note 1851, 1949.Google Scholar
3. Symonds, M. F. Minimum weight design of a simply supported transversely stiffened plate loaded in shear. Journal of the Aeronautical Sciences, Vol 23, pp 685–693, 1956.Google Scholar
4. Richards, D. M. Optimum design of stiffened shear webs with supplementary skin stabilisation. International Journal of Solids and Structures, Vol 12, pp 791–802, 1976.Google Scholar
5. ESDU. Buckling of long flat orthotropic plates in shear. Engineering Sciences Data Item 74005, Structures Subseries, Vol 8.Google Scholar
6. Stowell, E. Z. Critical shear stress of an infinitely long plate in the plastic region. NACA Tech Note 1681, 1948.Google Scholar
7. Rockey, K. C. Influence of stiffener thickness and rivet position upon the effectiveness of single-sided stiffeners on shear webs. The Aeronautical Quarterly, Vol 15, pp 97–106, 1964.Google Scholar