The acoustic performance of multifunctional aluminium foam panels has been studied in this paper. The closed cell foam structure was perforated using hole drilling techniques to produce an open cell structure for use in acoustic applications. Opening the cell structure allows permeability through the foam, thus improving acoustic absorption. The study analyzes the effects of hole size, perforation ratio and foam surface skin on acoustic performance. Mechanical testing was conducted to quantify the reduction in stiffness and strength of the perforated aluminum foam structure. Finally, optimal parameters for use in stiff automotive panel applications are identified.

Date Published: 2 April 2008
PDF: 8 pages
Proc. SPIE 6929, Behavior and Mechanics of Multifunctional and Composite Materials 2008, 69290W (2 April 2008); doi: 10.1117/12.776467

Published in SPIE Proceedings Vol. 6929:
Behavior and Mechanics of Multifunctional and Composite Materials 2008
Marcelo J. Dapino; Zoubeida Ounaies, Editor(s)