レーザ励起ガイド波の分散関係に基づくハニカムサンドイッチ構造のはく離検出

DOI

書誌事項

タイトル別名
  • Detection of Delamination in Honeycomb Sandwich Structures Based on Dispersion Relation of Laser-ultrasonic Guided Waves

抄録

<p>Using the laser-ultrasonic visualizing technique, we attempt to detect the delamination of a honeycomb sandwich structure based on the change in dispersive property. By replacing the honeycomb core with an equivalent homogenized layer, a three-layer model of the honeycomb sandwich structure can be constructed. Then, the dispersion relation of the guided waves can be derived and it was found that the wavenumber of A0 mode increases on the delamination region. Moreover, by scanning the laser on a specimen with artificial delamination, the guided waves were received by a PZT sensor. Then, the two-dimensional wavenumber map was derived by taking the ratio of Fourier spectrum between the adjoint data points. As a result, it is shown that the delamination can be detected based on the enhancement of the wavenumber. In addition, since the cell wall is clearly visible in the intact region on the wavenumber map, the delamination can be detected based on the disappearance of the cell wall.</p>

収録刊行物

  • 非破壊検査

    非破壊検査 73 (2), 85-92, 2024-02-01

    一般社団法人 日本非破壊検査協会

キーワード

詳細情報 詳細情報について

  • CRID
    1390861936166444800
  • DOI
    10.11396/jjsndi.73.85
  • ISSN
    03675866
  • 本文言語コード
    ja
  • データソース種別
    • JaLC
  • 抄録ライセンスフラグ
    使用不可

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