Free Vibration Analysis of Composite Laminate for Different Simply Supported Boundary Condition

This paper analyzed free vibration characteristics of Rectangular Composite laminate Plate for different boundary conditions. The analysis is performed using ANSYS APDL software package, in which SHELL element is used. The effects of Aspect ratios, Side-to-Thickness ratios and Modulus ratios on the plate vibration for different boundary condition are studied in this investigation and the first five frequencies mode shapes are studied. It is found from analysis that the natural frequencies of composite plate increases with increasing the constraint on the edges of plate. This work investigated the effects of four types of edge conditions such as a combination of simply supported, clamped and free boundaries condition like as SSSS, SSSF, SFSF and CFSF. 2D graphs used effectively for comparing various conditions. The results compared with available literatures and found that ANSYS is a good tool in the hand of a design engineer.