An investigation of the response of embedded near infrared fibre bragg grating (FBG) sensors (830nm) in glass fibre composites under fatigue loading

Epaarachchi, Jayantha A. and Canning, John and Stevenson, Michael (2007) An investigation of the response of embedded near infrared fibre bragg grating (FBG) sensors (830nm) in glass fibre composites under fatigue loading. In: 14th International Conference on Composite Structures (ICCS 14), 19-21 Nov 2007, Melbourne, Australia.

Abstract

Conventional FBG sensors operating in near infrared region (Bragg wavelength 830nm) were embedded in samples of 00/900 woven cloth/Vinylester laminates in order to investigate the variation of embedded FBG sensor spectra due to the damage accumulation in the laminate under fatigue loading conditions. It has been seen that the output FBG spectra of the embedded FBG sensors in fatigue loaded samples were distorted and bragg wavelength was broadened. These distortions of FBG spectra are an indication of an asymmetric and non-uniform strain distribution along the grating length of the FBG sensors due to accumulation of damage during fatigue loading. This information is useful for formulating a fundamental relationship between FBG spectral changes and the damage accumulation of composite structures. Further, it has been seen that the sensitivity and durability of the embedded FBG sensors fabricated by conventional writing techniques were excellent for health monitoring of composite structures.


Statistics for USQ ePrint 12869
Statistics for this ePrint Item
Item Type: Conference or Workshop Item (Commonwealth Reporting Category E) (Paper)
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: 07 Apr 2008 15:00
Last Modified: 03 Jul 2013 00:17
Uncontrolled Keywords: fibre bragg grating sensors; FBG sensors; glass fibre composites; fatique loading; health monitoring
Fields of Research (FOR2008): 09 Engineering > 0905 Civil Engineering > 090501 Civil Geotechnical Engineering
URI: http://eprints.usq.edu.au/id/eprint/12869

Actions (login required)

View Item Archive Repository Staff Only