Skip to Main content Skip to Navigation
Journal articles

Microstructure based model for sound absorption predictions of perforated closed-cell metallic foams

Abstract : Closed-cell metallic foams are known for their rigidity, lightness, thermal conductivity as well as their low production cost compared to open-cell metallic foams. However, they are also poor sound absorbers. Similarly to a rigid solid, a method to enhance their sound absorption is to perforate them. This method has shown good preliminary results but has not yet been analyzed from a microstructure point of view. The objective of this work is to better understand how perforations interact with closed-cell foam microstructure and how it modifies the sound absorption of the foam. A simple two-dimensional microstructural model of the perforated closed-cell metallic foam is presented and numerically solved. A rough three-dimensional conversion of the two-dimensional results is proposed. The results obtained with the calculation method show that the perforated closed-cell foam behaves similarly to a perforated solid; however, its sound absorption is modulated by the foam microstructure, and most particularly by the diameters of both perforation and pore. A comparison with measurements demonstrates that the proposed calculation method yields realistic trends. Some design guides are also proposed. (C) 2010 Acoustical Society of America. [DOI: 10.1121/1.3473696]
Complete list of metadata

Cited literature [22 references]  Display  Hide  Download
Contributor : Camille Perrot Connect in order to contact the contributor
Submitted on : Saturday, April 20, 2013 - 3:02:04 PM
Last modification on : Saturday, January 15, 2022 - 4:13:33 AM
Long-term archiving on: : Sunday, July 21, 2013 - 2:20:11 AM


Publisher files allowed on an open archive




F. Chevillotte, C. Perrot, R. Panneton. Microstructure based model for sound absorption predictions of perforated closed-cell metallic foams. Journal of the Acoustical Society of America, Acoustical Society of America, 2010, 128 (4), pp.1766--1776. ⟨10.1121/1.3473696⟩. ⟨hal-00692860⟩



Record views


Files downloads