Accuracies of Southwell and Force/Stiffness Methods in the Prediction of Buckling Strength of Hypersonic Aircraft Wing Tubular Panels
Ko, William L. (1987) Accuracies of Southwell and Force/Stiffness Methods in the Prediction of Buckling Strength of Hypersonic Aircraft Wing Tubular Panels. Technical Report NASA TM-88295, Research Engineering, NASA Dryden Flight Research Center.
Full text available as: |
Abstract
Accuracies of the Southwell method and the force/stiffness (F/S) method were examined when the methods were used in the predictions of buckling loads of hypersonic aircraft wing tubular panels, based on nondestructive buckling test data. Various factors affecting the accuracies of the two methods were discussed. Effects of load cutoff point in the nondestructive buckling tests on the accuracies of the two methods were discussed in great detail. For the tubular panels under pure compression, the F/S method was found to give more accurate buckling load predictions than the Southwell method, which excessively overpredicts the buckling load. It was found that the Southwell method required a higher load cutoff point, as compared with the F/S method. In using the F/S method for predicting the buckling load of tubular panels under pure compression, the load cutoff point of approximately 50 percent of the critical load could give reasonably accurate predictions.
| EPrint Type: | NASA Technical Memorandum |
|---|---|
| Keywords: | Accuracy of buckling load predictions, Force/stiffness method, Southwell method, Tubular panel |
| Subjects: | (31 - 39) Engineering: (39) Structural Mechanics |
| ID Code: | 515 |
| Deposited On: | 24 January 2006 |
| Additional Information: | 28 pages. |
