Combined Compressive and Shear Buckling Analysis of Hypersonic Aircraft Structural Sandwich Panels
Ko, William L. and Jackson, Raymond H. (1991) Combined Compressive and Shear Buckling Analysis of Hypersonic Aircraft Structural Sandwich Panels. Technical Report NASA TM-4290, Research Engineering, NASA Dryden Flight Research Center.
Full text available as: |
Abstract
The combined-load (compression and shear) buckling equations were established for orthotropic sandwich panels by using the Rayleigh-Ritz method to minimize the panel total potential energy. The resulting combined-load buckling equations were used to generate buckling interaction curves for super-plastically-formed/diffusion-bonded titanium truss-core sandwich panels and titanium honeycomb-core sandwich panels having the same specific weight. The relative combined-load buckling strengths of these two types of sandwich panels are compared with consideration of their sandwich orientations. For square and nearly square panels of both types, the combined load always induces symmetric buckling. As the panel aspect ratios increase, antisymmetric buckling will show up when the loading is shear-dominated combined loading. The square panel (either type) has the highest combined buckling strength, but the combined load buckling strength drops sharply as the panel aspect ratio increases. For square panels, the truss-core sandwich panel has higher compression-dominated combined-load buckling strength. However, for shear dominated loading, the square honeycomb-core sandwich panel has higher shear-dominated combined load buckling strength.
| EPrint Type: | NASA Technical Memorandum |
|---|---|
| Keywords: | Aircraft structures, Aspect ratio, Buckling, Combined load buckling, Combined stress, Compressive strength, Honeycomb cores, Sandwich panels, Truss cores |
| Subjects: | Aircraft/Project: Miscellaneous (31 - 39) Engineering: (39) Structural Mechanics |
| ID Code: | 313 |
| Deposited On: | 31 August 2004 |
| Additional Information: | 38 pages. |
