Improvement of sound absorption coefficient of glass fiber fabric epoxy composite inherently without deterioration of main mechanical properties

Abstract

In this study, the sound absorption behaviour of glass fiber fabric epoxy composite (GFFEC) is aimed to be increased without reduction in main mechanical properties and density. The effect of polystyrene (PS) and silica aerogel (SA) on sound absorption, density, tensile, and flexural properties along with drop impact performance of GFFEC were investigated. Both PS and SA was added into epoxy resin. Vacuum infusion method was applied to manufacture GFFEC’s. Both PS and SA addition resulted with enhanced sound absorption coefficient (SAC) of GFFEC. Breaking stress and elongation enhanced with either PS or SA addition. Increased absorbed energies during drop impact tests were observed in both PS and SA incorporated GFFEC’s compared to reference GFFEC. Density of reference composite (lightness) has improved by addition of SA and PS. Additionally, use of SA improved the SAC of GFFEC. On the other hand, maximum SAC was achieved with use of PS rather than SA.

The effect of silica aerogel on thermal and sound absorption insulation properties of epoxy plate and glass fiber fabric epoxy composite

“…The need for alternative materials with improved performance in the field of composites has been increasing day by day and new materials are sought to improve sound reduction and termal insulation. 41,42 Noise control plays a key role in order to improve the quality of life by minimizing the noise pollution. However, thermal insulation is also required for promoting human well-being, energy saving, and energy efficiency.…”