Journal
POLYMERS & POLYMER COMPOSITES
Volume 29, Issue 9_SUPPL, Pages S790-S802Publisher
SAGE PUBLICATIONS LTD
DOI: 10.1177/09673911211023942
Keywords
Natural fibre composites; hemp fibre woven fabrics; mechanical properties; fibre volume fraction; mechanical tests
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Funding
- University Technology of Troyes and Grand Est Region France -European Regional Development Fund (FEDER)
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In this study, the mechanical properties of hemp fibre composite materials were tested, showing that the tensile strength increases, viscoelasticity decreases, natural frequency increases, and damping ratio decreases with the increase of fibre volume fraction.
Nowadays natural fibre composites have gained great significance as reinforcements in polymer matrix composites. Composite material based on a polymer matrix reinforced with natural fibres is extensively used in industry due to their biodegradability, recyclability, low density and high specific properties. A study has been carried out here to investigate the fibre volume fraction effect of hemp fibre woven fabrics/PolyPropylene (PP) composite laminates on the tensile properties and impact hammer impact test. Initially, composite sheets were fabricated by the thermal-compression process with desired number of fabric layers to obtain composite laminates with different fibre volume fraction. Uniaxial, shear and biaxial tensile tests were performed and mechanical properties were calculated. Impact hammer test was also carried out to estimate the frequency and damping parameters of stratified composite plates. Scanning Electron Microscope (SEM) analysis was performed to observe the matrix and fibre constituent defects. Hemp fabrics/PP composite laminates exhibits viscoelastic behaviour and as the fibre volume fraction increases, the viscoelastic behaviour decreases to elastic behaviour. Due to this, the tensile strength increases as the fibre content increases. On the other hand, the natural frequency increases and damping ratio decrease as the fibre volume fraction increases.
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