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

Raj B. Ladani, Shuying Wu, Jin Zhang, Kamran Ghorbani, Anthony J. Kinloch, Adrian P. Mouritz, Chun H. Wang*

*Corresponding author for this work

Research output: Contribution to journalConference paperpeer-review

3 Citations (Scopus)
17 Downloads (Pure)

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.

Original languageEnglish
Pages (from-to)362-368
Number of pages7
JournalProcedia Engineering
Volume188
DOIs
Publication statusPublished - 2017
Externally publishedYes
Event6th Asia Pacific Workshop on Structural Health Monitoring, APWSHM 2016 - Hobart, Australia
Duration: 7 Dec 20169 Dec 2016

Bibliographical note

Copyright the Author(s) 2016. Version archived for private and non-commercial use with the permission of the author/s and according to publisher conditions. For further rights please contact the publisher.

Keywords

  • Carbon nanofibre
  • adhesive
  • nanocomposite
  • damage detection
  • structural health monitoring

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