Detection and quantitative evaluation of defects in glass fiber reinforced plastic laminates by microwaves

Atsushi Hosoi; Yuhei Yamaguchi; Yang Ju; Yasumoto Sato; Tsunaji Kitayama

doi:10.1016/j.compstruct.2015.03.050

Detection and quantitative evaluation of defects in glass fiber reinforced plastic laminates by microwaves

Atsushi Hosoi, Yuhei Yamaguchi, Yang Ju, Yasumoto Sato, Tsunaji Kitayama

Research output: Contribution to journal › Article › peer-review

16 Citations (Scopus)

Abstract

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.

Original language	English
Pages (from-to)	134-144
Number of pages	11
Journal	Composite Structures
Volume	128
DOIs	https://doi.org/10.1016/j.compstruct.2015.03.050
Publication status	Published - 2015 Sep 5

Keywords

Defects
Glass fiber reinforced plastic
Microwave
Nondestructive evaluation

ASJC Scopus subject areas

Civil and Structural Engineering
Ceramics and Composites

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title = "Detection and quantitative evaluation of defects in glass fiber reinforced plastic laminates by microwaves",

abstract = "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.",

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AU - Hosoi, Atsushi

AU - Yamaguchi, Yuhei

AU - Ju, Yang

AU - Sato, Yasumoto

AU - Kitayama, Tsunaji

PY - 2015/9/5

Y1 - 2015/9/5

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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.

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KW - Microwave

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