Fundamental Frequency of a Composite Sandwich Plate Containing Woven Layers
NAVAL ACADEMY ANNAPOLIS MD DEPT OF MECHANICAL ENGINEERING
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In this report the fundamental frequency of a sandwich composite plate containing woven fabric layers is determined using the Rayleigh-Ritz technique. The plate contains a Baltek balsa wood core and face sheets made of both unidirectional and woven fiberite layers. The flexural stiffnesses for the face sheets are obtained using the mosaic model. Of specific interest is the fundamental transverse bending mode and is numerically computed using MATHEMATICA for simply supported boundary conditions and clamped boundary conditions which are the in service boundary conditions. Experimental frequencies are determined for simulated free boundary conditions and are used as a means of comparison for the numerically computed fundamental frequencies.