Deflection of Multilayer-Sandwich Beams with Application to Plywood Panels

R. O. Foschi


The deflection of multilayer-sandwich beams (or plates with a dominant dimension in plan) when all layers are weak in shear is studied with a finite-element approach. The theory is applied to the deflection of plywood when soaked (moisture content more than 30%), and a particular case of five-ply plywood is studied in detail. The numerical results are shown to converge rapidly with increasing number of elements and the theoretical predictions are verified by experimental measurements. It is shown that the influence of shear deformations on the deflection of plywood, when soaked, is important and should be taken into account in design specifications.


sandwich plates;plywood;finite elements;concrete forms;structural engineering

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