Monte Carlo modeling of the fiber curliness effect on percolation of conductive composites

A three-dimensional (3D) Monte Carlo model is developed to study the fiber curliness effect on the percolation threshold of a composite filled with electrically conductive curved fibers. These fibers are simulated as zigzag-shaped fibers that are randomly positioned in the composite, forming a 3D ra...

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Veröffentlicht in:Applied physics letters 2010-02, Vol.96 (6)
Hauptverfasser: Ma, H. M., Gao, X.-L., Tolle, T. Benson
Format: Artikel
Sprache:eng
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Zusammenfassung:A three-dimensional (3D) Monte Carlo model is developed to study the fiber curliness effect on the percolation threshold of a composite filled with electrically conductive curved fibers. These fibers are simulated as zigzag-shaped fibers that are randomly positioned in the composite, forming a 3D random network. The simulation results show that the fiber curliness can significantly affect the percolation threshold: the more curved the fibers, the higher the threshold. The results also reveal an exponential relationship between the threshold and the fiber aspect ratio: the higher the aspect ratio, the lower the threshold. These predicted trends agree well with existing experimental and simulation results based on straight fibers or curved fibers with simpler shapes.
ISSN:0003-6951
1077-3118
DOI:10.1063/1.3309590