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 | |
| 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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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