| Titre : |
Health monitoring technique for large composite structures |
| Type de document : |
texte imprimé |
| Auteurs : |
Ali Naghashpour, Auteur ; Suong Van Hoa, Auteur |
| Année de publication : |
2015 |
| Article en page(s) : |
p. 56-59 |
| Note générale : |
Bibliogr. |
| Langues : |
Anglais (eng) |
| Catégories : |
Composites à fibres de carbone
Composites à fibres longues
Conducteurs organiques
Conduction électrique
Détection de dommages (matériaux)
Epoxydes
Nanotubes de carbone à parois multiplesUn nanotube de carbone multifeuillet est constitué de plusieurs feuillets de graphènes enroulés les uns autour des autres. Il existe deux modèles pour décrire la structure des nanotubes multifeuillets :
- le modèle poupée russe: les plans de graphène sont arrangés en cylindres concentriques ;
- le modèle parchemin: un seul feuillet de graphène est enroulé sur lui-même, comme une feuille de papier.
|
| Index. décimale : |
620.11 Matériaux (propriétés, résistance) |
| Résumé : |
The present work focuses on a structural health monitoring (SHM) technique to detect, locate and quantify damages that occur in large structures made of polymer-matrix composite materials white the structures are subjected to loading (Figure 1). In this technique, carbon nanotubes (CNT) are added to the polymer. Long fibres are then incorporated with the modified polymer to create an intelligent composite structure. The incorporation of nanotubes makes the polymer electrically conductive. The large structure is marked with grid points where electrically-conductive materials (such as silver for example' are deposited. The electrical properties between the grid points are measured ; these values are used as a reference set. Upon the application of a sufficiently high load, damage may occur at one or several locations in the large structure. lt is demonstrated that the occurrence of damage changes the electrical properties between the contact points surrounding the damage. The sharp change in the electrical properties between contact points is used as an indication for the detection, location and quantification of damage in large composite structures. |
| Note de contenu : |
- A NEW SOLUTION BASED ON CNTs : Producing intelligent fibre/epoxy/CNT composite structures - Electrical property measurement strategy - In-situ health monitoring device
- DEMONSTRATION OF THE SHM TECHNIQUE DEVELOPED
- RESULTS AND DISCUSSION : Non-conductive fibre/epoxy/MWCNT composite plates - Conductive fibre/epoxy/MWCNT composite plates |
| Permalink : |
https://e-campus.itech.fr/pmb/opac_css/index.php?lvl=notice_display&id=23885 |
in JEC COMPOSITES MAGAZINE > N° 96 (04/2015) . - p. 56-59
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