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Damping of flexural vibrations in glass fibre composite plates and honeycomb sandwich panels containing indentations of power-law profile

In this paper, the results of the experimental investigation into the addition of indentations of power-law profile into composite plates and panels and their subsequent inclusion into composite honeycomb sandwich panels are reported. The composite plates in question are sheets of composite with vis...

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Main Authors: E.P. Bowyer, Peter Nash, Victor V. Krylov
Format: Default Article
Published: 2013
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Online Access:https://hdl.handle.net/2134/11509
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author E.P. Bowyer
Peter Nash
Victor V. Krylov
author_facet E.P. Bowyer
Peter Nash
Victor V. Krylov
author_sort E.P. Bowyer (7120295)
collection Figshare
description In this paper, the results of the experimental investigation into the addition of indentations of power-law profile into composite plates and panels and their subsequent inclusion into composite honeycomb sandwich panels are reported. The composite plates in question are sheets of composite with visible indentations of power-law profile. A panel is a sheet of composite with the indentations encased within the sample. This makes a panel similar in surface texture to an un-machined composite sheet (reference plate) or conventional honeycomb sandwich panel. In the case of quadratic or higher-order profiles, the above-mentioned indentations act as two-dimensional acoustic black holes (ABH) for flexural waves that can absorb a large proportion of the incident wave energy. For all the composite samples tested in this investigation, the addition of two-dimensional acoustic black holes resulted in further increase in damping of resonant vibrations, in addition to the already substantial inherent damping due to large values of the loss factor for composites. Due to large values of the loss factor for composite materials, there was no need to use attached absorbing layers to implement the acoustic black hole effect.
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institution Loughborough University
publishDate 2013
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spelling rr-article-92244592013-01-01T00:00:00Z Damping of flexural vibrations in glass fibre composite plates and honeycomb sandwich panels containing indentations of power-law profile E.P. Bowyer (7120295) Peter Nash (473901) Victor V. Krylov (1252356) Other engineering not elsewhere classified untagged Engineering not elsewhere classified In this paper, the results of the experimental investigation into the addition of indentations of power-law profile into composite plates and panels and their subsequent inclusion into composite honeycomb sandwich panels are reported. The composite plates in question are sheets of composite with visible indentations of power-law profile. A panel is a sheet of composite with the indentations encased within the sample. This makes a panel similar in surface texture to an un-machined composite sheet (reference plate) or conventional honeycomb sandwich panel. In the case of quadratic or higher-order profiles, the above-mentioned indentations act as two-dimensional acoustic black holes (ABH) for flexural waves that can absorb a large proportion of the incident wave energy. For all the composite samples tested in this investigation, the addition of two-dimensional acoustic black holes resulted in further increase in damping of resonant vibrations, in addition to the already substantial inherent damping due to large values of the loss factor for composites. Due to large values of the loss factor for composite materials, there was no need to use attached absorbing layers to implement the acoustic black hole effect. 2013-01-01T00:00:00Z Text Journal contribution 2134/11509 https://figshare.com/articles/journal_contribution/Damping_of_flexural_vibrations_in_glass_fibre_composite_plates_and_honeycomb_sandwich_panels_containing_indentations_of_power-law_profile/9224459 CC BY-NC-ND 4.0
spellingShingle Other engineering not elsewhere classified
untagged
Engineering not elsewhere classified
E.P. Bowyer
Peter Nash
Victor V. Krylov
Damping of flexural vibrations in glass fibre composite plates and honeycomb sandwich panels containing indentations of power-law profile
title Damping of flexural vibrations in glass fibre composite plates and honeycomb sandwich panels containing indentations of power-law profile
title_full Damping of flexural vibrations in glass fibre composite plates and honeycomb sandwich panels containing indentations of power-law profile
title_fullStr Damping of flexural vibrations in glass fibre composite plates and honeycomb sandwich panels containing indentations of power-law profile
title_full_unstemmed Damping of flexural vibrations in glass fibre composite plates and honeycomb sandwich panels containing indentations of power-law profile
title_short Damping of flexural vibrations in glass fibre composite plates and honeycomb sandwich panels containing indentations of power-law profile
title_sort damping of flexural vibrations in glass fibre composite plates and honeycomb sandwich panels containing indentations of power-law profile
topic Other engineering not elsewhere classified
untagged
Engineering not elsewhere classified
url https://hdl.handle.net/2134/11509