Influence of fiber hybridization on the dynamic mechanical properties of glass/ramie fiber-reinforced polyester composites

This study aims to evaluate the influence of fiber hybridization and frequency on the dynamic mechanical properties of ramie/glass hybrid fiber-reinforced polyester composites. The storage modulus (E′), loss modulus (E″) and damping behavior (tan δ) were evaluated as a function of different relative...

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Bibliographic Details
Published in:Journal of reinforced plastics and composites 2012-12, Vol.31 (23), p.1652-1661
Main Authors: Romanzini, Daiane, Ornaghi, Heitor L, Amico, Sandro C, Zattera, Ademir J
Format: Article
Language:English
Subjects:
Damping
Dynamic mechanical properties
Fiber composites
Fibers
Glass
Loss modulus
Polyester resins
Storage modulus
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Summary:This study aims to evaluate the influence of fiber hybridization and frequency on the dynamic mechanical properties of ramie/glass hybrid fiber-reinforced polyester composites. The storage modulus (E′), loss modulus (E″) and damping behavior (tan δ) were evaluated as a function of different relative glass/ramie fiber volume ratios. For the storage modulus, the importance of the reinforcement effect above Tg was revealed. Also, the peak height, peak width at half-height and relaxation area were investigated for the loss modulus and tan δ curves, showing the influence of a shoulder below Tg for each case. Finally, the tan δ peak shifts to higher temperatures by increasing the frequency. Higher activation energy was observed for 75% glass fiber-containing composites.
ISSN:0731-6844
1530-7964
DOI:10.1177/0731684412459982