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Shielding effectiveness of non-woven carbon fibre sheets: Modelling the microstructure

This paper describes work undertaken to understand how the structure of a nonwoven carbon fibre material determines its shielding effectiveness, including the effects of fibre orientation, and contact resistance. In order to facilitate understanding of the material behaviour, software has been written to generate Monte Carlo Models (MCMs) of the material structure. The results of our MCMs are compared with measurements and some empirical expressions.