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The theory of sandwich construction developed in
this paper proceeds from the simple assumption that the filling
has only transverse direct and shear stiffnesses, corresponding
to its functional requirements (§1). This supposition permits
integration of the equilibrium equations for the filling (§2).
The resulting integrals are used to study the compression
buckling of a flat sandwich plate (§3). The formulae obtained
are complex, but may be simplified in practical cases (§4). A
second approach to sandwich problems is made in §5, where a
theory of "bending" of plates is outlined. This generalises the
usual theory, making allowance for flexibility in sheer. This
approach is applied to overall compression buckling of a plate
in §6, and agreement with the previous calculations is found.
This suggests the possibility of calculating buckling loads for
curved sandwich shells. A simple example, the symmetrical
buckling of a circular cylinder in compression is worked out in
§7. The theory developed would seem applicable to all cases of
buckling of not too short a wave length (§8). |
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