The response of embedded NIR (830 nm) fiber Bragg grating sensors in glass fiber composites under fatigue loading

Epaarachchi, Jayantha A. and Canning, John and Stevenson, Michael (2010) The response of embedded NIR (830 nm) fiber Bragg grating sensors in glass fiber composites under fatigue loading. Journal of Composite Materials, 44 (7). pp. 809-819. ISSN 0021-9983

Abstract

The fabrication and use of fiber Bragg grating (FBG) sensors, which operates in near infrared region (Bragg wavelength lB¼830 nm) to monitor the damage accumulation in composite is reported. The spectra 830nm of the embedded FBG sensor in 0/90 woven cloth/vinyl ester composite were distorted and broadened due to fatigue loading, as expected. These distortions in FBG spectra indicate asymmetric and nonuniform strain distributions along the grating length of the FBG sensors due to the accumulation of damage during fatigue loading regimes. This information is useful for formulating a fundamental relationship between FBG spectral changes and the damage accumulation of composite structures. The results demonstrate that the sensitivity and durability of the embedded FBG sensors fabricated by conventional writing techniques at 830nm range and monitored using inexpensive Si-based source and arrays were excellent for health monitoring of composite structures.


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Item Type: Article (Commonwealth Reporting Category C)
Refereed: Yes
Item Status: Live Archive
Additional Information: Permanent restricted access to published version due to publisher copyright policy.
Depositing User: Dr Jayantha Epaarachchi
Faculty / Department / School: Historic - Faculty of Engineering and Surveying - Department of Mechanical and Mechatronic Engineering
Date Deposited: 02 Nov 2010 10:31
Last Modified: 02 Jul 2013 23:32
Uncontrolled Keywords: NIR FBG sensors; health monitoring; composites; Bragg wavelength; damage accumulation; embedded FBG; ester composites; fatigue loadings; FBG sensor; fiber Bragg grating sensor; glass non-uniform strain; Si-based; spectral change
Fields of Research (FOR2008): 09 Engineering > 0901 Aerospace Engineering > 090199 Aerospace Engineering not elsewhere classified
09 Engineering > 0999 Other Engineering > 099902 Engineering Instrumentation
09 Engineering > 0912 Materials Engineering > 091202 Composite and Hybrid Materials
Socio-Economic Objective (SEO2008): E Expanding Knowledge > 97 Expanding Knowledge > 970109 Expanding Knowledge in Engineering
Identification Number or DOI: doi: 10.1177/0021998309346382
URI: http://eprints.usq.edu.au/id/eprint/6338

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