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Modelling and simulation of acoustic absorption of open cell metal foams

Modellierung und Simulation der akustischen Absorption von Metallschäumen mit offener Struktur
 
: Lautensack, C.; Kabel, M.

Stephani, G. ; Fraunhofer-Institut für Fertigungstechnik und Angewandte Materialforschung -IFAM-, Dresden:
Cellular metals for structural and functional applications, CELLMET 2008 : Proceedings of the International Symposium on Cellular Metals for Structural and Functional Applications held October 8 - 10, 2008 in Dresden, Germany
Dresden: Fraunhofer IFAM, 2009
pp.271-276
International Symposium on Cellular Metals for Structural and Functional Applications (CELLMET) <2, 2008, Dresden>
English
Conference Paper
Fraunhofer ITWM ()

Abstract
We analyse the microstructure of an open nickel-chrome foam using computed tomography. The foam sample is modelled by a random Laguerre tessellation, i.e. a weighted Voronoi tessellation, which is fitted to the original structure by means of geometric characteristics estimated from the CT image. Using the Allard-Johnson model we simulate the acoustic absorption of the real foam and the model. Finally, simulations in models with a larger variation of the cell sizes yield first results for the dependence of acoustic properties on the geometric structure of open cell foams.

: http://publica.fraunhofer.de/documents/N-117903.html