23rd Congress of International Council of the Aeronautical Sciences, 8-13 September, 2002, Toronto, Canada
Paper ICAS 2002-3.2.2

NONLINEAR BUCKLING PREDICTIONS OF CURVED PANELS UNDER COMBINEDCOMPRESSION AND SHEAR LOADING

M.M. Domb
Bombardier Aerospace, Canada

Keywords: curved panel, buckling, compression loading, shear loading

The present work deals with implementation of a nonlinear buckling analysis technique for the prediction of the initial buckling in simply-supported curved panels subjected to combined compression and shear loading. Interaction buckling curves are generated for a wide range of curved panels. The curves include the effect of a pre-existing level of imperfection in the panel on the combined buckling characteristics. Good correlation with the parabolic NACA interaction curve was obtained for the entire combined loading range when the model predictions are presented through the buckling stress ratios relative to the nonlinear single-loading cases. The results show the high sensitivity of curved panel buckling to the degree of initial imperfection in the panel, especially when compression loading is present. The magnitude of imperfection in a given panel would be dependent on the panel configuration parameters and its radius-to-thickness ratio. Detailed knowledge of this dependency would lead to better prediction of the buckling characteristics of the panel.

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