Experimental study on the vibro-acoustic properties of fibre-reinforced composites with integrated viscoelastic ethylene-propylene-dien-monomer (EPDM) rubber

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Contributors

Abstract

Composite materials offer for automotive applications the specific advantage of low constructive weight in combination with a high stiffness. For vibro-acoustic applications, especially the low structural weight leads to higher vibration amplitudes due to low forces of inertia and causes undesired sound radiation. A useful approach to eliminate these drawbacks and increase the structural damping without adding too much additional weight to the construction is the integration of viscoelastic damping layers in the composite materials during the manufacturing process. In the presented experimental study, different types of viscoelastic Ethylene-Propylene-Dien-Monomer (EPDM) rubber sheets are integrated in the mid-plane of a reference laminate made from carbon textile-reinforced epoxy. The vibro-acoustic properties of the fibre-reinforced multilayered composites - absorption coefficient, sound reduction index, dynamic stiffness and material damping - were measured and compared. As expected, the integration of EPDM sheets in the composite leads to higher material loss factors. To identify the vibro-acoustically optimal position of the EPDM layer within the composite lay-up, special simulation methods suitable for composite materials have to be used.

Details

Original languageEnglish
Title of host publication41st International Congress and Exposition on Noise Control Engineering 2012
Pages4497-4504
Number of pages8
Volume6
Publication statusPublished - 2012
Peer-reviewedYes

Conference

Title41st International Congress and Exposition on Noise Control Engineering 2012, INTER-NOISE 2012
Duration19 - 22 August 2012
CityNew York, NY
CountryUnited States of America

Keywords

ASJC Scopus subject areas