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

12 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

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Keywords

Defects
Glass fiber reinforced plastic
Microwave
Nondestructive evaluation

ASJC Scopus subject areas

Civil and Structural Engineering
Ceramics and Composites

Cite this

Hosoi, A., Yamaguchi, Y., Ju, Y., Sato, Y., & Kitayama, T. (2015). Detection and quantitative evaluation of defects in glass fiber reinforced plastic laminates by microwaves. Composite Structures, 128, 134-144. https://doi.org/10.1016/j.compstruct.2015.03.050

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AU - Kitayama, Tsunaji

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Access to Document

10.1016/j.compstruct.2015.03.050