Article ID | Journal | Published Year | Pages | File Type |
---|---|---|---|---|
251230 | Composite Structures | 2015 | 11 Pages |
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.
Related Topics
Physical Sciences and Engineering
Engineering
Civil and Structural Engineering
Authors
Atsushi Hosoi, Yuhei Yamaguchi, Yang Ju, Yasumoto Sato, Tsunaji Kitayama,