Please use this identifier to cite or link to this item: http://hdl.handle.net/10397/32191
Title: Utilization of embedded optical fibre sensors for delamination characterization in composite laminates using a static strain method
Authors: Ling, HY
Lau, KT 
Cheng, L 
Jin, W 
Issue Date: 2005
Publisher: Institute of Physics Publishing
Source: Smart materials and structures, 2005, v. 14, no. 6, p. 1377-1386 How to cite?
Journal: Smart materials and structures 
Abstract: Embedded fibre Bragg grating (FBG) sensors are utilized to characterize a delamination in glass fibre-reinforced epoxy (GF/EP) composite laminates using a static strain method. Composite beams with different edge delaminations in the thickness-wise direction are monitored by the FBG sensors, whose centres are located at delamination tips of the beams, under a three-point bending test. A surface bonded strain gauge is employed to calibrate the FBG sensor using the bending test. Moreover, strain distribution within the sensing region of the delaminated composite beams is numerically calculated by the finite element method (FEM). FEM results establish the relationship between the strain distribution of the beams and the shape of reflection spectra from the FBG sensors. A correlation between delamination location in the thickness-wise direction of the beams and the shape of the reflection spectra is then highlighted.
URI: http://hdl.handle.net/10397/32191
ISSN: 0964-1726
EISSN: 1361-665X
DOI: 10.1088/0964-1726/14/6/030
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