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
|HTML Citation||EndNote||Dublin Core||Reference Manager|
Full text not available from this archive.
Official URL: http://jcm.sagepub.com/cgi/content/abstract/44/7/809
Identification Number or DOI: doi: 10.1177/0021998309346382
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.
Archive Staff Only: edit this record