Paper Title:

Free Vibration Analysis of Composite Sandwich Plate with Viscoelastic Core

Periodical Key Engineering Materials (Volumes 471 - 472)
Main Theme Composite Science and Technology
Edited by S.M. Sapuan, F. Mustapha, D.L. Majid, Z. Leman, A.H.M. Ariff, M.K.A. Ariffin, M.Y.M. Zuhri, M.R. Ishak and J. Sahari
Pages 658-663
DOI 10.4028/www.scientific.net/KEM.471-472.658
Citation Soroush Sadeghnejad Limouei et al., 2011, Key Engineering Materials, 471-472, 658
Online since February, 2011
Authors Soroush Sadeghnejad Limouei, Mojtaba Sadighi, Abdolreza Ohadi
Keywords 3D Elastic, Composite Sandwich Plate, Natural Frequency, Viscoelastic Core
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Abstract

New Reddy-type elements based on Reddy’s higher-order theory are used in the analysis of composite sandwich plates with viscoelastic core, which is achieved by considering independent transverse displacements on two faces and linear variations through depth of plate core. In addition, Young modulus, rotational inertia, and kinetic energy of core are considered and core is assumed as 3D elastic structure with the properties of an orthotropic viscoelastic material. To improve the Reddy’s higher-order theory, a rectangular element with four nodes, which each node has seven degrees of freedom, is proposed. Hamilton’s principle has been used to obtain the equations of motion. A finite element code for structural response analysis of the free vibration is developed. The obtained results are compared with existence researches. The influence of material properties, lamination schemes, and fiber angle on natural frequencies of composite plates are investigated.