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Pressure effects on the resonant attenuation of soft porous beads-based materials for underwater acoustics

Article dans une revue avec comité de lecture
Author
LACOUR, Thomas
1002421 Institut de Mécanique et d'Ingénierie [I2M]
POUPART, Romain
525419 Centre de Recherche Paul Pascal [CRPP]
MONDAIN-MONVAL, Olivier
525419 Centre de Recherche Paul Pascal [CRPP]
ARISTÉGUI, Christophe
1002421 Institut de Mécanique et d'Ingénierie [I2M]
ccPONCELET, Olivier
1002421 Institut de Mécanique et d'Ingénierie [I2M]
ccBRUNET, Thomas
1002421 Institut de Mécanique et d'Ingénierie [I2M]

URI
http://hdl.handle.net/10985/24982
DOI
10.1063/5.0144249
Date
2023-04-21
Journal
Journal of Applied Physics

Abstract

Dedicated coating materials for anechoism and furtivity in underwater acoustics must exhibit a strong reliability regarding their mechanical resistance to hydrostatic pressure. Soft porous materials, especially, a distribution of soft porous beads within a polyurethane matrix, have been previously proposed as an acoustic insulator device. The purpose of the present letter is to investigate the attenuation efficiency of soft porous silicone beads-based materials while being exposed to uniaxial loads mimicking hydrostatic pressures encountered in underwater acoustics. The acoustic performance of this locally resonant material is then compared to the classical coating technology using micro-balloons. The use of an adapted surfactant (a silicone alkyl polyether compound) in the fabrication process of the soft porous silicone-based beads, obtained through an emulsion templating process, leads to particles exhibiting an open porosity. The (resonant) attenuation of the soft porous beads-based material remains greater than the micro-balloons-based material until several bars. Above this critical resilience value, the mechanical stress irreversibly damages the soft porous beads.

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