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Dynamic Instability of Delaminated Composite Plates under Parametric Excitation

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Abstract:

The dynamic instability behavior of delaminated composite plates under transverse excitations was investigated experimentally and analytically. An electromagnetic device, acting like a spring with alternating stiffness, was used to parametrically excite the delaminated composite plates transversely. An analytical method, combined with the finite element method, was used to determine the instability regions of the delaminated composite plates based on the modal parameters of the composite plate and the position, the stiffness of the electromagnetic device. The delamination size and position of composite plates were varied to assess their effects on the excitation frequencies of simple and combination resonances in instability regions. The experimental results were found to agree with the analytical ones.

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Periodical:

Key Engineering Materials (Volumes 326-328)

Pages:

1765-1768

DOI:

https://doi.org/10.4028/www.scientific.net/KEM.326-328.1765

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Online since:

December 2006

Authors:

Meng Kao Yeh, Kuei Chang Tung

Keywords:

Composite Plate, Delamination, Dynamic Instabilities, Parametric Excitation

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© 2006 Trans Tech Publications Ltd. All Rights Reserved

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