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Advances in Materials Science and Engineering
Volume 2018, Article ID 8630232, 10 pages
Research Article

Mechanical Characterization of Carbon Fibres Recycled by Steam Thermolysis: A Statistical Approach

1Institut Clément Ader (ICA), Université de Toulouse, CNRS, Mines Albi, UPS, INSA, ISAE-SUPAERO, Campus Jarlard, 81013 Albi CT Cedex 09, France
2Université de Toulouse, Mines Albi, UMR CNRS 5302, Centre RAPSODEE, Campus Jarlard, F-81013 Albi cedex 09, France
3Alpha Recyclage Composites, 4 rue Jules Védrines, 31400 Toulouse, France
4INSA-Lyon, MATEIS, UMR CNRS 5510, Université de Lyon, 7 Avenue Jean Capelle, 69621 Villeurbanne, France

Correspondence should be addressed to M. Boulanghien; rf.ibla-senim@gnaluobm

Received 16 March 2018; Accepted 23 April 2018; Published 20 May 2018

Academic Editor: Akihiko Kimura

Copyright © 2018 M. Boulanghien et al. 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.


The recent development of technologies for recycling carbon fibre reinforced plastics (CFRPs) leads to the need to evaluate the mechanical response of recycled carbon fibres. As these fibres are likely to be degraded during the recycling treatment, it is very important to determine their tensile residual properties so as to evaluate their ability as reinforcement for new composite materials. Carbon fibres reclaimed by a steam-thermal treatment applied to degrade the epoxy resin matrix of a CFRP are here analysed. Two conditions were chosen so as to reach two degradation efficiency levels of the steam thermolysis. Several carbon fibre samples were selected for mechanical testing carried out either on single filaments using single fibre tensile tests or on fibre tows using bundle tensile tests. It is shown that the single fibre tensile test leads to a wide variability of statistical parameters derived from the analysis. Bundle tensile tests results were able to indicate that fibre strength of recycled carbon fibre is similar to corresponding as-received carbon fibres thanks to a statistically relevant database. Wide number of tested filaments enabled indeed to obtain low scatters.