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RESEARCH PAPERS

On Free Vibrations of Fiber Reinforced Doubly Curved Panels, Part 2: Applications

[+] Author and Article Information
A. V. Singh, V. Kumar

Department of Mechanical Engineering, University of Western Ontario, London, Ontario, Canada N6A 5B9

J. Vib. Acoust 120(1), 295-300 (Jan 01, 1998) (6 pages) doi:10.1115/1.2893820 History: Received July 01, 1996; Revised December 01, 1996; Online February 26, 2008

Abstract

The applications of a Ritz-type numerical scheme, in which the displacement fields are prescribed by Bezier surface patches, are presented for the analysis of doubly curved laminated open panels. The fundamental strain-displacement relations and energy expressions are developed in orthogonal curvilinear coordinates. The higher-order shear deformation theory and the effects of rotary inertia are considered in the formulation. Good comparisons of the results are obtained for a class of open panels. For example, values of the natural frequencies of open cylindrical and spherical panels made of isotropic material are compared with the results from the finite element analysis. Cases of cantilevered and simply supported angle-ply laminated cylindrical panel and a fully clamped isotropic conical panel are also examined for comparison with the available sources in the literature. In addition, the natural frequencies are presented for angle-ply laminated circular cylindrical, conical and spherical panels and the influence of the fiber orientation on the fundamental frequency is also examined for the angle ply having one, two [ φ/−φ] and four [ φ/−φ/φ/−φ] laminae arrangements.

Copyright © 1998 by The American Society of Mechanical Engineers
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