Vibroacoustic performance of fiber metal laminates with delamination

Balakrishnan, B and Raja, S and Dwarakanathan, D and Rajagopal, A (2016) Vibroacoustic performance of fiber metal laminates with delamination. Mechanics of Advanced Materials and Structures, 23 (12). pp. 1369-1378. ISSN 15376494

Vibroacoustic performance of fiber metal laminates with delamination.pdf

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In the present work, the numerical assessment of vibroacoustic (VA) performance of fiber metal laminates (FML) with mid-plane center delamination is presented. A fluid structure interaction study has been done using finite element method (FEM). Experimental validation is performed on an aluminium (AL) panel for verifying the correctness of finite element (FE) idealization procedure to simulate the fluid-structure interaction. Delamination is introduced in the FE model of FML panel and VA analysis is subsequently carried out. Sound transmission loss (STL) is computed on the panel with center delamination and without delamination. The overall sound pressure level (OASPL) shows that the presence of delamination (40% in total area) in FML has not changed the total energy of the transmitted sound when compared to aluminium and composites. However, in the narrow frequency bands (150–200 Hz, 200–250 Hz), the sound transmission nature has been significantly affected due to local delamination modes participating in the fluid-structure interaction process.

Item Type: Article
Subjects: PHYSICS > Acoustics
PHYSICS > Optics
PHYSICS > Physics of Elementary Particles and Fields
Depositing User: Mrs SK Pratibha
Date Deposited: 27 Feb 2019 17:10
Last Modified: 27 Feb 2019 17:10

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