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

School of Fundamental Science and Engineering

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

17 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

Ceramics and Composites
Civil and Structural Engineering

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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

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

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

Abstract

Keywords

ASJC Scopus subject areas

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