Simulating the effective electric conductivity of polymer composites with high aspect ratio fillers

Nilsson F, Schubert DW, Chen F (2016)

Publication Type: Journal article, Review article

Publication year: 2016

Journal

Composites Science and Technology Elsevier

Pages Range: 16 - 23

Journal Issue: 132

URI: https://www.sciencedirect.com/science/article/pii/S0266353816305528#!

Abstract

Three simulation models have been developed for predicting the electrical conductivity and the electrical percolation threshold of field-grading polymer composites intended for high voltage applications. The three models are based on finite element modelling (FEM), percolation threshold modelling (PTM) and electrical networks modelling (ENM). A Monte Carlo algorithm was used to construct the geometries, with either soft-core (overlapping) or hard-core/soft-shell (non-overlapping) fibres. Conductivity measurements on carbon-fibre/PMMA composites with well-defined fibre aspect ratios were used for experimental validation. The average fibre orientations were calculated from scanning electron micrographs. The soft-core PTM model with experimental fibre orientations and without adjustable parameters gave accurate (R2 = 0.984) predictions of the electrical percolation threshold as a function of aspect ratio. The corresponding soft-core ENM model, with close-contact conductivity calculated with FEM, resulted in good conductivity predictions for the longest fibres, still without the use of any adjustable parameters. The hard-core/soft-shell versions of the models, using the shell thickness as an adjustable parameter, gave similar but slightly poorer results.

Authors with CRIS profile

Dirk Schubert Lehrstuhl für Werkstoffwissenschaften (Polymerwerkstoffe)

Involved external institutions

Royal Institute of Technology / Kungliga Tekniska Högskolan (KTH) SE Sweden (SE)

How to cite

APA:

Nilsson, F., Schubert, D.W., & Chen, F. (2016). Simulating the effective electric conductivity of polymer composites with high aspect ratio fillers. Composites Science and Technology, 132, 16 - 23.

MLA:

Nilsson, Fritjof, Dirk W. Schubert, and Fei Chen. "Simulating the effective electric conductivity of polymer composites with high aspect ratio fillers." Composites Science and Technology 132 (2016): 16 - 23.

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