TY - JOUR
T1 - Detection of microscopic damages in composite laminates with embedded small-diameter fiber Bragg grating sensors
AU - Okabe, Yoji
AU - Mizutani, Tadahito
AU - Yashiro, Shigeki
AU - Takeda, Nobuo
N1 - Funding Information:
This research was conducted as a part of the “R&D for Smart Materials Structure System” project within the Academic Institutions Centered Program supported by NEDO (New Energy and Industrial Technology Development Organization), Japan.
Copyright:
Copyright 2008 Elsevier B.V., All rights reserved.
PY - 2002/6
Y1 - 2002/6
N2 - Small-diameter fiber Bragg grating (FBG) sensors, of outside diameter 52 μm, have been developed by the authors and Hitachi Cable Ltd. for embedding inside a laminate without deterioration of the mechanical properties of the composite laminate. In this research, the small-diameter FBG sensor was embedded in the 0° ply of a CFRP cross-ply laminate for the detection of transverse cracks in the 90° ply. The reflection spectra from the FBG sensor were obtained at various tensile stresses. As a result of damage, the spectrum became broad and had some peaks with increase in the transverse crack density. Furthermore, theoretical calculation reproduced the change in the spectrum very well. These results show that small-diameter FBG sensors have the potential to detect the occurrence of transverse cracks through the change in the form of the spectrum, and to evaluate the transverse crack density quantitatively by the spectrum width.
AB - Small-diameter fiber Bragg grating (FBG) sensors, of outside diameter 52 μm, have been developed by the authors and Hitachi Cable Ltd. for embedding inside a laminate without deterioration of the mechanical properties of the composite laminate. In this research, the small-diameter FBG sensor was embedded in the 0° ply of a CFRP cross-ply laminate for the detection of transverse cracks in the 90° ply. The reflection spectra from the FBG sensor were obtained at various tensile stresses. As a result of damage, the spectrum became broad and had some peaks with increase in the transverse crack density. Furthermore, theoretical calculation reproduced the change in the spectrum very well. These results show that small-diameter FBG sensors have the potential to detect the occurrence of transverse cracks through the change in the form of the spectrum, and to evaluate the transverse crack density quantitatively by the spectrum width.
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U2 - 10.1016/S0266-3538(02)00009-X
DO - 10.1016/S0266-3538(02)00009-X
M3 - Article
AN - SCOPUS:0036601649
SN - 0266-3538
VL - 62
SP - 951
EP - 958
JO - Composites Science and Technology
JF - Composites Science and Technology
IS - 7-8
ER -