Experimental investigation on pore size effect on the linear viscoelastic properties of acoustic foams.
This paper presents linear viscoelastic measurement on a large frequency range (10(-2)-10(8) Hz) for cross-linked polymer open-cell foams of same density and different pore sizes. This large extension of frequency range is obtained by the validation of a frequency-temperature superposition principle, commonly used with polymers. At higher frequencies, the shear moduli are independent of the pore size. In acoustical insulation range (1 Hz-16 kHz), the shear moduli decreases with the foams' pore size.
Deverge
Mickaël
M
LAUM, Centre National de la Recherche Scientifique, Universite du Maine, Avenue O. Messiaen, Le Mans, France. mickael.deverge@univ-lemans.fr
Benyahia
Lazhar
L
Sahraoui
Sohbi
S