Next Article in Journal
Composite Reinforcement Architectures: A Review of Field-Assisted Additive Manufacturing for Polymers
Next Article in Special Issue
Does the Type of Polymer and Carbon Nanotube Structure Control the Electromagnetic Shielding in Melt-Mixed Polymer Nanocomposites?
Previous Article in Journal
Designed Conducting Polymer Composites That Facilitate Long-Lived, Light-Driven Oxygen and Hydrogen Evolution from Water in a Photoelectrochemical Concentration Cell (PECC)
Previous Article in Special Issue
Screening of Different Carbon Nanotubes in Melt-Mixed Polymer Composites with Different Polymer Matrices for Their Thermoelectrical Properties
Open AccessArticle

Multifunctional Carbon Nanotubes Enhanced Structural Composites with Improved Toughness and Damage Monitoring

Smart Plastics Group, University of South Brittany (UBS), IRDL CNRS 6027-UBS, 56321 Lorient, France
*
Author to whom correspondence should be addressed.
J. Compos. Sci. 2019, 3(4), 109; https://doi.org/10.3390/jcs3040109
Received: 3 October 2019 / Revised: 5 December 2019 / Accepted: 13 December 2019 / Published: 17 December 2019
(This article belongs to the Special Issue Recent Advances in Carbon Nanotube Composites)
The potential of carbon nanotubes (CNT) as multifunctional filler in poly(epoxy)-based structural composites has been investigated. In a first step the reinforcement effect of CNT has been studied by tensile and three points bending tests, which evidenced significant improvements of stress and strain at break (respectively +17% and +30% for tensile tests on unidirectional carbon fibre-epoxy composites). Moreover, fracture experiments have also revealed a positive effect of CNT on the toughness (G1c) of carbon fibres-epoxy composites (+105% of improvement at the initial stage). In a second step, the health monitoring capability quantum resistive strain sensors (sQRS) made of CNT filled epoxy nanocomposite, incorporated in the core of glass fibres-epoxy composites has been studied. It was shown that during cyclic tensile tests, following the evolution of the relative resistance amplitude (Ar) of sQRS with strain gives a pertinent information on non-reversible phenomena such as plastic deformation and cracks’ development within the composite. In particular, the evolution of the sQRS sensitivity (gauge factor GF) under and over the elastic limit, allows to track damage accumulation throughout the composite. These results suggest a possible use of sQRS for the structural health monitoring (SHM) of composites in fields such as boating, wind energy, aeronautics and automotive. View Full-Text
Keywords: fracture; toughness; Conductive Polymer nanoComposite; structural health monitoring; strain; damage accumulation; multi-walled carbon nanotube; carbon fiber; epoxy matrix; SHM fracture; toughness; Conductive Polymer nanoComposite; structural health monitoring; strain; damage accumulation; multi-walled carbon nanotube; carbon fiber; epoxy matrix; SHM
Show Figures

Figure 1

MDPI and ACS Style

Robert, C.; Pillin, I.; Castro, M.; Feller, J.-F. Multifunctional Carbon Nanotubes Enhanced Structural Composites with Improved Toughness and Damage Monitoring. J. Compos. Sci. 2019, 3, 109.

Show more citation formats Show less citations formats
Note that from the first issue of 2016, MDPI journals use article numbers instead of page numbers. See further details here.

Article Access Map by Country/Region

1
Back to TopTop