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Some Theoretical Considerations on Box Beams

Published online by Cambridge University Press:  28 July 2016

Jean Drymael
Jean Drymael*
Affiliation:
University of Brussels
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Summary

Box beams, built up essentially with flanges and webs are widely used in aircraft construction and much has been written about their calculation. But often assumptions are implicitly made without reason. The first aim of this paper is to point out which assumptions must be chosen and why, and to show what results may be expected from them. The calculations are then developed in the. cases of the quadrangular box beam and the wing with three spars (redundancy of the first degree).

Type
Research Article
Information
The Aeronautical Journal , Volume 45 , Issue 361 , January 1941 , pp. 5 - 28
Copyright
Copyright © Royal Aeronautical Society 1941

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References

page 9 note * For a plane web the reduced area equals the true area.

page 9 note † Except if the web buckles, but this kind of failure is not considered here.

page 13 note * Except if the flanges are coplanar.

page 14 note * Except if the webs are parallel.

page 15 note * This is the point of view adopted by Hatcher, R. S. in “ Rational Shear Analysis of Box Girders,” Journal of the Aeronautical Sciences, Vol. 4, 1936–37, p. 233.CrossRefGoogle Scholar See also Vol. 5, p. 369, and Vol. 6, p. 58.

page 18 note * Cicala, P.. Atti della Reale Accademia delle Scienze di Torino, Vol. 70, 1934–35 Google Scholar.

page 19 note * L. Kirste, Sur le Calcul des poutres en caisson. l'Aérotechnique (Suppl. to l'Aèronautique), 1937, p. 1 and 57.

page 28 note * Z. Leliwa-Krzywoblocki. L'Aerotechnique (suppl. to l'Aéronautique) 1938, p. 85.