Effect of Disbond Propagation on the Reflected Spectra of CFBG Sensors Embedded within the Bondline of Composite Bonded Joints

Ya Lin Guo; S.L. Ogin; T.F. Capell; A.M. Thorne; G.T. Reed; Ying Song Wang; S.C. Tjin

doi:10.4028/www.scientific.net/AMR.79-82.2067

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HomeAdvanced Materials ResearchAdvanced Materials Research Vols. 79-82Effect of Disbond Propagation on the Reflected...

Effect of Disbond Propagation on the Reflected Spectra of CFBG Sensors Embedded within the Bondline of Composite Bonded Joints

Abstract:

Chirped fiber Bragg grating (CFBG) sensors were embedded within the adhesive bondline of single-lap CFRP-GFRP bonded composite joints. The effect of disbond propagation (as a consequence of fatigue loading) on the reflected spectra from the CFBG sensor has been studied. As the disbond propagates, thermal strains generated during the bonding of the joint at elevated temperature are released and, as a consequence, a peak in the reflected spectra of the CFBG sensor can be seen. Using a transparent GFRP adherend, it has been possible to demonstrate that there is reasonable agreement between the position of the peak in the reflected spectrum and the disbond front position in the bonded joint.

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Periodical:

Advanced Materials Research (Volumes 79-82)

Pages:

2067-2070

DOI:

https://doi.org/10.4028/www.scientific.net/AMR.79-82.2067

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Online since:

August 2009

Authors:

Ya Lin Guo, S.L. Ogin, T.F. Capell, A.M. Thorne, G.T. Reed, Ying Song Wang, S.C. Tjin

Keywords:

Adhesively Bonded Composite Joint, Chirped Fibre Bragg Grating, Disbond Propagation

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References

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