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Dynamics of rotating composite beams: A comparative study between CNT reinforced polymer composite beams and laminated composite beams using spectral finite elements

Deepak, BP and Ganguli, Ranjan and Gopalakrishnan, S (2012) Dynamics of rotating composite beams: A comparative study between CNT reinforced polymer composite beams and laminated composite beams using spectral finite elements. In: International Journal of Mechanical Sciences, 64 (1). pp. 110-126.

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Official URL: http://dx.doi.org/10.1016/j.ijmecsci.2012.07.009

Abstract

This paper presents a spectral finite element formulation for uniform and tapered rotating CNT embedded polymer composite beams. The exact solution to the governing differential equation of a rotating Euler-Bernoulli beam with maximum centrifugal force is used as an interpolating function for the spectral element formulation. Free vibration and wave propagation analysis is carried out using the formulated spectral element. The present study shows the substantial effect of volume fraction and L/D ratio of CNTs in a beam on the natural frequency, impulse response and wave propagation characteristics of the rotating beam. It is found that the CNTs embedded in the matrix can make the rotating beam non-dispersive in nature at higher rotation speeds. Embedded CNTs can significantly alter the dynamics of polymer-nanocomposite beams. The results are also compared with those obtained for carbon fiber reinforced laminated composite rotating beams. It is observed that CNT reinforced rotating beams are superior in performance compared to laminated composite rotating beams. © 2012 Elsevier Ltd. All rights reserved.

Item Type: Journal Article
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Additional Information: Copyright for this article belongs to Elsevier
Keywords: Wavenumber; Carbon nanotube; Laminated composite; Rotating beam; Dynamic stiffness matrix; Frequency response function
Department/Centre: Division of Mechanical Sciences > Aerospace Engineering (Formerly, Aeronautical Engineering)
Date Deposited: 18 Dec 2012 10:27
Last Modified: 18 Dec 2012 10:27
URI: http://eprints.iisc.ernet.in/id/eprint/45035

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