Modal analysis of thin FRP skew symmetric cross-ply laminate with circular cutout

Abstract

The present work deals with the free vibration analysis of a thin Fiber Reinforced Plastic (FRP) skew laminated composite plate with a circular cutout. The problem is modeled in ANSYS software based on the Classical Lamination Theory (CLT) which is suitable for the analysis of thin laminates. The first five natural frequencies of the skew plate are evaluated by changing the skew angle of the laminate. The laminate considered for the present analysis is a four-layered symmetric cross-ply laminate. The length-to-thickness ratio is maintained as 50. The diameter of the circular cutout is selected from the d/l ratio which is taken as 0.3. The variations of the first five natural frequencies with respect to the skew angle are presented.