TY - JOUR
T1 - Detection and quantitative evaluation of defects in glass fiber reinforced plastic laminates by microwaves
AU - Hosoi, Atsushi
AU - Yamaguchi, Yuhei
AU - Ju, Yang
AU - Sato, Yasumoto
AU - Kitayama, Tsunaji
PY - 2015/9/5
Y1 - 2015/9/5
N2 - A novel method using microwaves is proposed to detect and evaluate defects in glass fiber reinforced plastic (GFRP) laminates. A thin circular plastic film simulating delamination was inserted in GFRP laminates and was detected using microwave reflectometry. A focusing mirror sensor consisting of a horn antenna and two metal mirrors was used to improve the measurement resolution. In addition, the thickness of the film was calculated using a proposed model based on microwave propagation theory. Measuring the variation in the amplitude of the microwave reflectivity, a 7.5-μm-thick film was successfully detected in a 3-mm-thick GFRP laminate. Moreover, the calculated results of the inserted film thickness had a high degree of accuracy.
AB - A novel method using microwaves is proposed to detect and evaluate defects in glass fiber reinforced plastic (GFRP) laminates. A thin circular plastic film simulating delamination was inserted in GFRP laminates and was detected using microwave reflectometry. A focusing mirror sensor consisting of a horn antenna and two metal mirrors was used to improve the measurement resolution. In addition, the thickness of the film was calculated using a proposed model based on microwave propagation theory. Measuring the variation in the amplitude of the microwave reflectivity, a 7.5-μm-thick film was successfully detected in a 3-mm-thick GFRP laminate. Moreover, the calculated results of the inserted film thickness had a high degree of accuracy.
KW - Defects
KW - Glass fiber reinforced plastic
KW - Microwave
KW - Nondestructive evaluation
UR - http://www.scopus.com/inward/record.url?scp=84926179392&partnerID=8YFLogxK
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U2 - 10.1016/j.compstruct.2015.03.050
DO - 10.1016/j.compstruct.2015.03.050
M3 - Article
AN - SCOPUS:84926179392
VL - 128
SP - 134
EP - 144
JO - Composite Structures
JF - Composite Structures
SN - 0263-8223
ER -