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The torsional stiffness of thin duralumin shells subjected to large torquesThis report gives a simple method of estimating the torsional stiffness of thin shells, such as box beams or stressed-skin wings under large torque loads. A general efficiency chart for shells in torsion is established, based on the assumption that the efficiency of the web sheet in resisting deformation decreases linearly with the average stress. The chart is used to calculate the torsional deflections of eight box beams, a test wing panel, and a complete wing; the results of the calculations are shown in comparison with the test results. The agreement is probably as good as might be expected considering the empirical nature of the method and the well-known dispersion between results of tests on thin sheet-metal structures.
Document ID
19930081234
Acquisition Source
Legacy CDMS
Document Type
Other
Authors
Kuhn, Paul
Date Acquired
September 6, 2013
Publication Date
July 1, 1934
Report/Patent Number
NACA-TN-500
Accession Number
93R10524
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.

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