Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/27976
Title: Determination of dynamic strain profile and delamination detection of composite structures using embedded multiplexed fibre-optic sensors
Authors: Ling, HY
Lau, KT 
Cheng, L 
Keywords: Dynamic measurement
Fibre-optic sensors
Structural health monitoring
Issue Date: 2004
Publisher: Elsevier
Source: Composite structures, 2004, v. 66, no. 1-4, p. 317-326 How to cite?
Journal: Composite structures 
Abstract: This paper studies the dynamic strain measurement and delamination detection of clamped-clamped composite structures using embedded multiplexed Fibre-optic Bragg grating (FBG) sensors through experimental and theoretical approaches. A dynamic strain calibration of the FBG sensors and surface mounted strain gauges to find out the correlation between the strain and photovoltage is reported. The embedded FBG sensors were used to measure the natural frequency and dynamic strain of intact and delaminated composite structures. The strain profile of these structures subjected to external excitations was evaluated by using experimental measured data and a modified vibration theory. The results revealed that the use of the embedded FBG sensors is able to actually measure the dynamic strain and identify the existence of delamination of the structures. This allows the continuous estimation of fatigue life and minimises the need of in-site inspection of the structures.
URI: http://hdl.handle.net/10397/27976
ISSN: 0263-8223
EISSN: 1879-1085
DOI: 10.1016/j.compstruct.2004.04.054
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