A New Simple Approach Analysis for Free Vibration of Laminated Plates

A new simple approach, based on the first order shear deformation theory is presented for the free vibration analysis of isotropic, orthotropic and layered anisotropic composite plates. This approach incorporates realistic displacement amplitude, in terms of a polynomial and a general shape function multiplication in x and y coordinates and neglecting the shear correction coefficients. The analysis is carried out using the classical Rayleigh-Ritz method. The quite easy to implement, accuracy and efficiency of the solution methodology are examined by comparing the results with alternative solution available in the literature and very good agreement is observed. The effects of boundary conditions, aspect ratio, fiber orientations and different numbers of layers on frequencies characteristics are shown in this paper

Keywords:

Free vibration , First order shear deformation theory , Laminated plates , Rayleigh-Ritz