Acoustical properties of Lyocell, hemp, and flax composites
- 2 July 2010
- journal article
- other
- Published by SAGE Publications in Journal of Reinforced Plastics and Composites
- Vol. 29 (20), 3149-3154
- https://doi.org/10.1177/0731684410367533
Abstract
This study characterizes the acoustical behavior of natural fiber composites. Regenerated cellulose fibers (Lyocell), hemp fibers, and flax fibers were embedded in an epoxy-matrix. These unidirectional composites were tested for their logarithmic damping decrement, the resonance frequency, the ultrasound velocity, the dynamic and static modulus of elasticity, and bending strength and density. Glass-epoxy composites served as a reference. All tested cellulosic fibers showed a significantly higher damping at lower densities. The ultrasound velocity was in the range of the reference for Lyocell— and hemp—fiber composites. Taking the low density into account, the dynamic and static modulus of elasticity of the samples were relatively high compared to the glass reference. The specific acoustical properties of these natural fiber composites point at high value applications, e.g., devices that require high damping of the body structures.Keywords
This publication has 19 references indexed in Scilit:
- Recent Development in Natural Fiber Reinforced Polypropylene CompositesJournal of Reinforced Plastics and Composites, 2008
- Characteristics of Hermès flax fibres as a function of their location in the stem and properties of the derived unidirectional compositesComposites Part A: Applied Science and Manufacturing, 2007
- High-tenacity man-made cellulose fibre reinforced thermoplastics – Injection moulding compounds with polypropylene and alternative matricesComposites Part A: Applied Science and Manufacturing, 2006
- Strain hardening in regenerated cellulose fibresComposites Science and Technology, 2006
- Activities in biocompositesMaterials Today, 2003
- Next step for automotive materialsMaterials Today, 2003
- Composites get greenerMaterials Today, 2003
- Steam explosion of flax — a superior technique for upgrading fibre valueBiomass and Bioenergy, 1998
- Improvement of adhesion between polyethylene and regenerated cellulose fibers by surface fibrillationPolymer Composites, 1996
- Energy dissipation and attenuation under high-loss conditionsBritish Journal of Applied Physics, 1966