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

摘要

A three-dimensional u00013Du0002 Monte Carlo model is developed to study the fiber curliness effect on thenpercolation threshold of a composite filled with electrically conductive curved fibers. These fibersnare simulated as zigzag-shaped fibers that are randomly positioned in the composite, forming a 3Dnrandom network. The simulation results show that the fiber curliness can significantly affect thenpercolation threshold: the more curved the fibers, the higher the threshold. The results also reveal annexponential relationship between the threshold and the fiber aspect ratio: the higher the aspect ratio,nthe lower the threshold. These predicted trends agree well with existing experimental and simulationnresults based on straight fibers or curved fibers with simpler shapes.