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- Publisher
- Emerald Publishing
- Copyright
- Copyright © Emerald Group Publishing Limited
- ISSN
- 0002-2667
- DOI
- 10.1108/eb032390
- Publisher site
- See Article on Publisher Site
Abstract
The paper describes an investigation of the stresses due to torsion of a doublysymmetrical thinwalled rectangular box section with four corner spar flanges. The box section was subjected to a pure torque at the free end. The other end of the box section was constrained to remain plane. The shear stresses in the top and bottom skins and in the vertical webs and the direct stresses in the corner spar flanges were measured. The measured values were compared with theoretical predictions using the linear and closely spaced rigid diaphragm assumptions. The torsional stiffness was also measured and compared with theory. The experimental results show the marked effect of buckling of the skin covering on the stresses in the flanges. They also illustrate the importance of using the secant modulus in calculations.
Journal
Aircraft Engineering and Aerospace Technology – Emerald Publishing
Published: Feb 1, 1954