Electromagnetic shielding effectiveness of carbon fibre reinforced composites

Munalli, D.; Dimitrakis, G.; Chronopoulos, D.; Greedy, S.; Long, A.

Abstract

This paper reports results on the shielding effectiveness parameter of laminated epoxy composites with carbon fibre reinforcements. Measurements of shielding effectiveness were carried out with a coaxial transmission line testing chamber according to ASTM 4935 standard and epoxy-matrix composites with continuous carbon-fibres were proven to be an excellent electromagnetic interference shielding material, where a composite slab made of 4 layers of prepregs provided more than 99.9% of electromagnetic attenuation. It was found that the reflection mechanism of the shielding material was mainly influenced by the fibre volume ratio, and that an increase in the number of layers of the composite resulted in higher shielding effectiveness due to a greater absorption mechanism. Calculations of the shielding effectiveness parameter of the material used were made by means of commercial electromagnetic simulation tools, having determined experimentally the overall resistivity of the composite. The findings presented in this work suggest that in presence of a greater number of interfaces at different impedance the separate modelling of matrix and fibres at mesoscopic scale must be taken into account.

Citation

Munalli, D., Dimitrakis, G., Chronopoulos, D., Greedy, S., & Long, A. (2019). Electromagnetic shielding effectiveness of carbon fibre reinforced composites. Composites Part B: Engineering, 173, Article 106906. https://doi.org/10.1016/j.compositesb.2019.106906

• Journal Article Type: Article
• Acceptance Date: May 16, 2019
• Online Publication Date: May 17, 2019
• Publication Date: Sep 15, 2019
• Deposit Date: May 23, 2019
• Publicly Available Date: May 17, 2020
• Journal: Composites Part B: Engineering
• Print ISSN: 1359-8368
• Electronic ISSN: 1879-1069
• Publisher: Elsevier
• Peer Reviewed: Peer Reviewed
• Volume: 173
• Article Number: 106906
• DOI: https://doi.org/10.1016/j.compositesb.2019.106906
• Keywords: Mechanical Engineering; Industrial and Manufacturing Engineering; Mechanics of Materials; Ceramics and Composites
• Public URL: https://nottingham-repository.worktribe.com/output/2086409
• Publisher URL: https://www.sciencedirect.com/science/article/pii/S1359836818343762