光音響法による炭素繊維補強樹脂の表面直下剥離の3次元イメージング

カテゴリ: 論文誌(論文単位)

グループ名: 【C】電子・情報・システム部門

発行日: 2019/02/01

タイトル(英語): Three Dimensional Imaging of Subsurface Delamination in Carbon Fiber Reinforced Plastic using Photoacoustic Wave Method

著者名: 中畑　和之（愛媛大学大学院理工学研究科），黄木　景二（愛媛大学大学院理工学研究科），水上　孝一（愛媛大学大学院理工学研究科），大平　克己（ジャパンプローブ（株）研究開発センター），丸山　真幸（理化学研究所光量子工学研究センター），和田　智之（理化学研究所光量子工学研究センター），浪田　健（京都大学大学院医学研究科），椎名　毅（京都大学大学院医学研究科）

著者名(英語): Kazuyuki Nakahata (Graduate School of Science and Engineering, Ehime University), Keiji Ogi (Graduate School of Science and Engineering, Ehime University), Koichi Mizukami (Graduate School of Science and Engineering, Ehime University), Katsumi Ohira (Research and Development Center, Japan Probe Co., Ltd.), Masayuki Maruyama (Center for Advanced Photonics, RIKEN), Satoshi Wada (Center for Advanced Photonics, RIKEN), Takeshi Namita (Graduate School of Medicine, Kyoto University), Tsuyoshi Shiina (Graduate School of Medicine, Kyoto University)

キーワード: 炭素繊維補強樹脂(CFRP)，光音響イメージング，非破壊検査，開口合成法(SAFT)，音響異方性，光学特性　　carbon fiber reinforced plastic (CFRP)，photo acoustic imaging，nondestructive testing，synthetic aperture focusing technique (SAFT)，acoustic anisotropy，optical property

要約(英語): Ultrasonic wave generated by interaction of the material with pulsed lasers is known to photoacoustic (PA) wave. In this study, the PA imaging is applied to the nondestructive testing for carbon fiber reinforced plastic (CFRP). When subsurface flaws are in CFRP, the detection of the flaws is sometimes challenging because the trailing signal from the surface interferes with the scattered signal from the flaws. Here we developed a PA microscopy (PAM) to reconstruct the location and the shape of the subsurface flaws. The PAM employs a confocal arrangement of optical and acoustic lens to maximize the intensity of generated PA waves. To enhance the lateral resolution of the image, we introduced the synthetic aperture focusing technique (SAFT). In the SAFT, it is necessary to consider direction-dependent group velocities due to the strong anisotropy in CFRP. The performance of the PA imaging combined with the SAFT was checked with artificial delaminations in a cross-ply CFRP specimen. It was shown that the PA wave had a wide frequency band and our method offered a high spatial resolution image.

本誌: 電気学会論文誌C（電子・情報・システム部門誌） Vol.139 No.2 （2019） 特集：「みえないものをみる」光技術

本誌掲載ページ: 142-148 p

原稿種別: 論文／日本語

電子版へのリンク: https://www.jstage.jst.go.jp/article/ieejeiss/139/2/139_142/_article/-char/ja/