Preprint Article Version 1 Preserved in Portico This version is not peer-reviewed

Mechanical and Viscoelastic Properties of Carbon Fiber Epoxy Composites with Interleaved Graphite Nanoplatelet Layer

Barbara Palmieri
ORCID logo ,
Ciro Siviello
,
Angelo Petriccione
,
Manuela Espresso
,
Michele Giordano
,
Alfonso Martone
* ORCID logo ,
Fabrizia Cilento
Version 1 : Received: 6 May 2023 / Approved: 8 May 2023 / Online: 8 May 2023 (09:47:58 CEST)

A peer-reviewed article of this Preprint also exists.

Palmieri, B.; Siviello, C.; Petriccione, A.; Espresso, M.; Giordano, M.; Martone, A.; Cilento, F. Mechanical and Viscoelastic Properties of Carbon Fibre Epoxy Composites with Interleaved Graphite Nanoplatelet Layer. J. Compos. Sci. 2023, 7, 235. Palmieri, B.; Siviello, C.; Petriccione, A.; Espresso, M.; Giordano, M.; Martone, A.; Cilento, F. Mechanical and Viscoelastic Properties of Carbon Fibre Epoxy Composites with Interleaved Graphite Nanoplatelet Layer. J. Compos. Sci. 2023, 7, 235.

Abstract

The use of interleaving material with viscoelastic properties is one of the most effective solutions to improve the damping capacity of CFRP laminates. Improving composite damping without threatening mechanical performance is challenging and the use of nanomaterials should lead to the target. In this paper, the effect of a nanostructured interlayer based on Graphite Nanoplatelets (GNPs) on the damping capacity and fracture toughness of CFRP laminates has been investigated. High-content GNP/Epoxy (70wt/30wt) coating was sprayed on the surface of CF/Epoxy prepregs at two different areal weight (10 and 40 g/m2) and incorporated at the middle-plane of a CFRP laminate. The effect of the GNP areal weight on viscoelastic and the mechanical behaviour of the laminates was investigated. Coupons with low-areal weight GNP interlayer showed a 25% increase in damping capacity with a trivial reduction of the elastic modulus. Moreover, a reduction in interlaminar shear strength (ILSS) and fracture toughness (both mode I and mode II) was observed in the composites with GNPs interlayer. GNPs alignment and degree of compaction reached during process were found as key parameters on material performances. By increasing the areal weight a mitigation on the mechanical performances drop was achieved (-15%).

Keywords

Damping; nanomaterials; carbon fibre laminates; interleaved layer

Subject

Chemistry and Materials Science, Materials Science and Technology

Copyright: This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

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