Study of Free Vibration Analysis of Circular Laminated Plate Based on FSDT

Abstract

Fiber and matrix make up a composite substance. As a result, a composite material is a product that has two or more distinct constituent materials or phases. Layers of composite material fibres are assembled to have ideal engineering properties in a composite laminate. The aim is to create a material that outperforms its constituent parts in terms of efficiency. Mechanical strength, corrosion resistance, high-temperature resistivity, heat conductivity, stiffness, resilience, lightness, and appearance are some of these properties. These have a wide range of applications, especially in structures that must be light, such as aircraft, medical devices and spacecraft. These structures' laminated plates are subjected to complex loads. The analysis of free vibration of circular laminated plates is the focus of our research .As a result, examining the modal characteristics of these plates is crucial. The behaviour of an isotropic circular plate is studied first, after that, there's a circular orthotropic layer is considered. The properties of the material have been set. Natural frequencies were calculated for a variety of boundary situations, aspect/size ratio, thickness ratio, laminate angle, number of laminates, and material properties are investigated. These variables' impacts on the essence of vibration have been investigated and discussed. The theory of first order shear deformation is used in the study. Natural frequencies are calculated with the aid of ANSYS 14.0.The value of the first ten natural frequencies increases with the number of plates, plate material, and angle of ply of circular plate, while natural frequencies decrease with the size (radius) of circular plate and thickness, as shown in the results.