Study of Vibration Analysis of Laminated Composite Plates Using FEM (original) (raw)

The vibrational analysis of laminated composite plates is analysed using finite element method. In this paper Numerical results have been computed for the effect of number of layers, thickness ratio of plate, different boundary conditions, different aspect ratio, and different angle of fibre orientation of laminated composite plate. The analysis for rectangular plate is carried out for thickness (h/b= 0.001, 0.01, 0.05, 0.1, and 0.2) and different aspect ratios (a/b=1, 1.5, 2, and 2.5). The problem of free vibration analysis of composite square plates having (3, 5, 7, and 9) lamina layers (angle ply and cross ply) is also considered. The non-dimensional fundamental frequency of vibration is found to increase with increase of angle of fibre orientation and number of layers but non-dimensional fundamental frequency decrease with increase in size ratio and thickness to width ratio. The natural frequencies and mode shapes are compared for different boundary condition. Comparisons are ma...