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A brief survey is made of a selected group of problems concerned with the elastic behavior of sandwich construction. These include the wrinkling of the facings under compressive load and the effect of shear deformation in the core on the deflection of uniformly loaded panels and on the buckling loads of panels subjected to edgewise compression or shear. In most of the investigations made at the Forest Products Laboratory in cooperation with the Air Force-Navy-Civil Subcommittee on Aircraft Design Criteria, the materials of the facings and core have been taken to be orthotropic. In this paper, in order to show the characteristic features of the behavior of sandwich construction in as simple form as possible, the formulas and curves are presented for constructions with isotropic facings and cores. These results are obtained directly from those for orthotropic materials. Reference is made to reports containing the corresponding more general results.
March, H. W.
Mathematician, Forest Products Laboratory, U. S. Dept. of Agriculture, Madison, Wis.