Using carbon nanofibre sensors for in-situ detection and monitoring of disbonds in bonded composite joints

Ladani, R, Wu, S, Zhang, J, Ghorbani, K, Kinloch, A, Mouritz, A and Wang, C 2017, 'Using carbon nanofibre sensors for in-situ detection and monitoring of disbonds in bonded composite joints', in Wing Kong Chiu, Steve Galea, Akira Mita, Nobuo Takeda (ed.) Proceedings of the 6th Asia Pacific Workshop on Structural Health Monitoring (6APWSHM), Tasmania, Australia, 7-9 December 2016, pp. 362-368.


Document type: Conference Paper
Collection: Conference Papers

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Title Using carbon nanofibre sensors for in-situ detection and monitoring of disbonds in bonded composite joints
Author(s) Ladani, R
Wu, S
Zhang, J
Ghorbani, K
Kinloch, A
Mouritz, A
Wang, C
Year 2017
Conference name 6APWSHM
Conference location Tasmania, Australia
Conference dates 7-9 December 2016
Proceedings title Proceedings of the 6th Asia Pacific Workshop on Structural Health Monitoring (6APWSHM)
Editor(s) Wing Kong Chiu, Steve Galea, Akira Mita, Nobuo Takeda
Publisher Elsevier BV
Place of publication Netherlands
Start page 362
End page 368
Total pages 7
Abstract This paper focuses on the ability of carbon nanofibre (CNF) networks to in situ monitor fatigue induced disbond damage in adhesive bonded composite joints. The inclusion of CNFs in the epoxy adhesive increases its conductivity by five orders of magnitude. The improved electrical conductivity is utilized to evaluate the ability of the CNF network to monitor and detect the fatigue induced disbond damage by measuring the in-situ resistance changes using a four probe setup. The changes in total resistance was a function of the bulk electrical resistivity of the adhesive and the bond dimensions, which were related to the disbond length to model and determine the size of the disbond. The simple resistivity model was in good agreement with the resistance measured during fatigue testing. Good agreement was found between the optical disbond observations and the disbond length calculated using the proposed model. Finite element simulations were performed to ascertain the range of applicability of the proposed model. The simplicity of the disbond detection technique via direct current potential drop technique enables real time monitoring of crack growth in the composite structure.
Subjects Aerospace Materials
Composite and Hybrid Materials
Nanomaterials
Keyword(s) Adhesive
Carbon nanofibre
Damage detection
Nanocomposite
Structural health monitoring
DOI - identifier 10.1016/j.proeng.2017.04.496
Copyright notice © 2016 The Authors. Published by Elsevier Ltd. Creative Commons BY-NC-ND license
ISSN 1877-7058
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