An analytical method for free vibration analysis of functionally graded sandwich beams

- Journal title : Wind and Structures
- Volume 23, Issue 1, 2016, pp.59-73
- Publisher : Techno-Press
- DOI : 10.12989/was.2016.23.1.059

Title & Authors

An analytical method for free vibration analysis of functionally graded sandwich beams

Bouakkaz, K.; Hadji, L.; Zouatnia, N.; Adda Bedia, E.A.;

Bouakkaz, K.; Hadji, L.; Zouatnia, N.; Adda Bedia, E.A.;

Abstract

In this paper, a hyperbolic shear deformation beam theory is developed for free vibration analysis of functionally graded (FG) sandwich beams. The theory account for higher-order variation of transverse shear strain through the depth of the beam and satisfies the zero traction boundary conditions on the surfaces of the beam without using shear correction factors. The material properties of the functionally graded sandwich beam are assumed to vary according to power law distribution of the volume fraction of the constituents. The core layer is still homogeneous and made of an isotropic material. Based on the present refined beam theory, the equations of motion are derived from Hamilton`s principle. Navier type solution method was used to obtain frequencies. Illustrative examples are given to show the effects of varying gradients and thickness to length ratios on free vibration of functionally graded sandwich beams.

Keywords

functionally graded material;sandwich beam;hamilton`s principle;vibration;

Language

English

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