MATEC Web Conf.
Volume 283, 2019The 2nd Franco-Chinese Acoustic Conference (FCAC 2018)
|Number of page(s)||4|
|Section||Acoustic and Elastic Wave Scattering|
|Published online||28 June 2019|
Damage mechanisms assessment of hybrid carbon/flax fibre composites using acoustic emission
1 Le Mans Université, Laboratoire d’acoustique de l’université du Mans (LAUM), UMR CNRS 6613, Av. O. Messiaen 72085 Le Mans Cedex 9, France
2 Ecole Nationale d’Ingénieurs de Sfax, Département Génie Mécanique, Laboratoire de recherche de Mécanique, Modélisation et Production (LA2MP), Route Soukra, 3038, Sfax, Tunisie
* Corresponding author: Mariem.Ben_Ameur.Etu@univ-lemans.fr
The purpose of the present experimental study is to describe the damage mechanisms occurring in epoxy matrix composites reinforced with hybrid carbon-flax fibres. The samples tested were consist of unidirectional carbon and flax fibre plies with different stacking sequences. Composite laminates were manufactured by hand lay-up process. The specimens were tested under uniaxial tensile loading. The tests carried out were monitored by the acoustic emission (AE) technique. The results obtained during the monotonic tensile tests were analyzed in order to identify the damage mechanisms evolutions. The recorded events were classified with the k-means algorithm which is a statistical multivariable analysis. In addition, it was an unsupervised classification according to temporal descriptors. The percentage of each damage mechanism to the global failure was evaluated by the hits number and the acoustic energy activity. The AE technique was correlated with scanning electron microscopy (SEM) observations to identify the typical damage mechanisms.
© The Authors, published by EDP Sciences, 2019
This is an Open Access article distributed under the terms of the Creative Commons Attribution License 4.0, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
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