High strain-rate behavior of natural fiber-reinforced polymer composites:

Published on May 1, 2012in Journal of Composite Materials1.972
· DOI :10.1177/0021998311414946
Wonsuk Kim20
Estimated H-index: 20
(UM: University of Michigan),
Alan Argento13
Estimated H-index: 13
(UM: University of Michigan)
+ 4 AuthorsDeborah F. Mielewski17
Estimated H-index: 17
(Ford Motor Company)
The high strain-rate constitutive behavior of polymer composites with various natural fibers is studied. Hemp, hemp/glass hybrid, cellulose, and wheat straw-reinforced polymeric composites have been manufactured, and a split-Hopkinson pressure bar apparatus has been designed to measure the dynamic stress–strain response of the materials. Using the apparatus, compressive stress–strain curves have been obtained that reveal the materials’ constitutive characteristics at strain rates between 600 and 2400 strain/s. Primary findings indicate that natural fibers in thermoset composites dissipate energy at lower levels of stress and higher strain than glass-reinforced composites. In the case of thermoplastic matrices, the effect on energy dissipation of natural fibers vs. conventional talc reinforcements is highly dependent on resin properties. Natural fibers in polypropylene homopolymer show improved reinforcement but have degraded energy dissipation compared to talc. Whereas in polypropylene copolymer, natural ...
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