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Vibrations of multiple delaminated beams

Vibrations of multiple delaminated beams
Vibrations of multiple delaminated beams
The free vibrations of beams with two enveloping delaminations have been solved analytically without resorting to numerical approximation. The multiple delaminated beam is analyzed as several interconnected Euler–Bernoulli beams. The differential stretching and the bending–extension coupling are considered in the formulation. The influence of the sizes and locations of the delaminations on the primary and secondary frequencies and mode shapes of a beam are investigated. For clamped–clamped beams, the primary frequency shows a high sensitivity for the long delamination but a low sensitivity for the second short delamination, while for the secondary frequency, the sensitivity is high for both delaminations. For cantilever beams, the primary and secondary frequencies show a high sensitivity for the long delamination but low sensitivity for the second short delamination. Results are compared with the analytical and experimental data reported in the literature to verify the validity of the present model.
free vibrations, multiple delaminations, frequency, mode shape, composite beam
0263-8223
467-477
Shu, Dongwei
c54c2744-7263-43e5-8eda-7d329d44c4d8
Della, Christian N.
218552a1-70df-411c-9197-a24a243b1002
Shu, Dongwei
c54c2744-7263-43e5-8eda-7d329d44c4d8
Della, Christian N.
218552a1-70df-411c-9197-a24a243b1002

Shu, Dongwei and Della, Christian N. (2004) Vibrations of multiple delaminated beams. Composite Structures, 64 (3-4), 467-477. (doi:10.1016/j.compstruct.2003.09.047).

Record type: Article

Abstract

The free vibrations of beams with two enveloping delaminations have been solved analytically without resorting to numerical approximation. The multiple delaminated beam is analyzed as several interconnected Euler–Bernoulli beams. The differential stretching and the bending–extension coupling are considered in the formulation. The influence of the sizes and locations of the delaminations on the primary and secondary frequencies and mode shapes of a beam are investigated. For clamped–clamped beams, the primary frequency shows a high sensitivity for the long delamination but a low sensitivity for the second short delamination, while for the secondary frequency, the sensitivity is high for both delaminations. For cantilever beams, the primary and secondary frequencies show a high sensitivity for the long delamination but low sensitivity for the second short delamination. Results are compared with the analytical and experimental data reported in the literature to verify the validity of the present model.

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More information

Submitted date: June 2003
Published date: June 2004
Keywords: free vibrations, multiple delaminations, frequency, mode shape, composite beam
Organisations: Fluid Structure Interactions Group

Identifiers

Local EPrints ID: 50350
URI: http://eprints.soton.ac.uk/id/eprint/50350
ISSN: 0263-8223
PURE UUID: f242d892-fc51-4099-8ad4-33a6ea09051c

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Date deposited: 19 Feb 2008
Last modified: 08 Jan 2022 01:10

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Contributors

Author: Dongwei Shu
Author: Christian N. Della

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