Vibration and acoustic properties of composites with embedded lithium-ion polymer batteries

Galos, J, Afaghi Khatibi, A and Mouritz, A 2019, 'Vibration and acoustic properties of composites with embedded lithium-ion polymer batteries', Composite Structures, vol. 220, pp. 677-686.

Document type: Journal Article
Collection: Journal Articles

Title Vibration and acoustic properties of composites with embedded lithium-ion polymer batteries
Author(s) Galos, J
Afaghi Khatibi, A
Mouritz, A
Year 2019
Journal name Composite Structures
Volume number 220
Start page 677
End page 686
Total pages 10
Publisher Elsevier
Abstract Composite structures containing lithium-ion polymer (LiPo) batteries are being developed for electrical energy storage in motor vehicles and other applications. This paper presents an experimental and numerical study into the effect of embedding (LiPo) batteries into carbon fibre laminates and sandwich panels on the vibration and acoustic properties. The vibration responses (modal frequencies, damping) were measured experimentally using Laser Doppler vibrometry and calculated numerically using finite element modal analysis. The results reveal that careful placement of LiPo batteries within composite structures is needed to control the vibration properties. Embedding batteries at the nodal points increases the vibration bending damping ratio for modes II and III, with improvements of up to 220% (mode II) and 310% (mode III) for the laminate and sandwich composite, respectively. LiPo batteries also improve the acoustic performance by increasing the coincidence frequency and decreasing the wavenumber amplitude at frequencies above the first vibration bending mode. The results indicate that the judicious placement of embedded LiPo batteries can improve the vibration damping properties of both carbon fibre laminates and sandwich composites.
Subject Aerospace Materials
Automotive Engineering Materials
Keyword(s) Acoustic
Energy storage
DOI - identifier 10.1016/j.compstruct.2019.04.013
Copyright notice © 2019 Elsevier Ltd. All rights reserved.
ISSN 0263-8223
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