Electrical percolation in short fiber composites
- Clemson Univ., SC (United States)
Thermoplastics containing conductive reinforcements provide as effective an EMI shielding as that provided by secondary metallization techniques, while affording mechanical strength and greater cost savings. The properties of short fiber reinforced composites are related to its structure and this structure is controlled by processing. The present study utilizes experimentally measured microstructure of injection molded short carbon fiber/Nylon 6, 6 composites to model the electrical percolation behavior. The experimentally measured fiber length distributions and fiber orientation distributions are incorporated into the continuum space simulations based on a concentric cylindrical model. Finite size scaling is applied to investigate the thresholds in infinitely large systems. The microstructure is also considered as a growing fractal. The simulations provide cluster number and cluster size for the fractal growth. The fractal dimension and percolation exponents are determined for large clusters near percolation.
- OSTI ID:
- 45042
- Report Number(s):
- CONF-941005--
- Country of Publication:
- United States
- Language:
- English
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