Mechanical and Thermal Buckling Analysis of Sandwich Panels Under Different Edge Conditions
Ko, William L. (1993) Mechanical and Thermal Buckling Analysis of Sandwich Panels Under Different Edge Conditions. Technical Report NASA TM-4535, Research Engineering, NASA Dryden Flight Research Center.
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Abstract
By using the Rayleigh-Ritz method of minimizing the total potential energy of a structural system, combined load (mechanical or thermal load) buckling equations are established for orthotropic rectangular sandwich panels supported under four different edge conditions. Two-dimensional buckling interaction curves and three-dimensional buckling interaction surfaces are constructed for high-temperature honeycomb-core sandwich panels supported under four different edge conditions. The interaction surfaces provide easy comparison of the panel buckling strengths and the domains of symmetrical and antisymmetrical buckling associated with the different edge conditions. Thermal buckling curves of the sandwich panels also are presented. The thermal buckling conditions for the cases with and without thermal moments were found to be identical for the small deformation theory. In sandwich panels, the effect of transverse shear is quite large, and by neglecting the transverse shear effect, the buckling loads could be overpredicted considerably. Clamping of the edges could greatly increase buckling strength more in compression than in shear.
| EPrint Type: | NASA Technical Memorandum |
|---|---|
| Keywords: | Buckling interaction curves, Buckling interaction surfaces, Mechanical buckling, Sandwich panels, Thermal buckling |
| Subjects: | (23 - 29) Chemistry and Materials - General: (24) Composite Materials (31 - 39) Engineering: (39) Structural Mechanics |
| ID Code: | 1063 |
| Deposited On: | 25 August 2006 |
| Additional Information: | 14 pages. Also presented at the Pacific International Conference on Aerospace Science and Technology (PICAST-1), Taiwan, Republic of China, Dec. 6–9, 1993. |
