Abstract
The problem of local instability of thick sandwich columns having orthotropic cores is treated under two different types of loading: (a) axial compressive loads acting at the edges of face plates and (b) bending moments acting at the ends of the sandwich column. End points of the face plates are assumed to be pinned. The present method is, however, applicable to general end conditions and for arbitrary axial and transverse loading. I t is shown that the deflected shape is neither symmetric nor antisymmetric, but asymmetric. Numerical calculations and curves are made for various types of cores employed in industry. The results are found to be in good agreement with the experimental data.
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