The flexural vibration of thick composite circular plates is studied by the finite element method. An annular element based on a high-order plate theory is developed for the asymmetric motion. The present formulas can be simplified to obtain some other plate theories' formulas. Numerical results are presented for various plate constructions. Comparisons are made among the results of various plate theories. Significant differences found between the results of Mindlin plate theory and high-order plate theories for certain layer arrangements.
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