電位差法を用いたＣＦＲＰ積層板のはく離モニタリング―同定誤差原因と２段階はく離同定による改善―

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タイトル別名
  • Monitoring of Delamination of Laminated CFRP with Electric Voltage Method-Two-Stage Monitoring Method for Various Shapes of Delamination-
  • デンイサホウ オ モチイタ CFRP セキソウバン ノ ハクリ モニタリング ドウテイ ゴサ ゲンイン ト 2 ダンカイ ハクリ ドウテイ ニ ヨル カイゼン
  • Two-Stage Monitoring Method for Various Shapes of Delamination
  • 同定誤差原因と2段階はく離同定による改善

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抄録

Monitoring of delamination is indispensable for CFRP structures. In authors' previous studies, the delamination can be monitored with the electric resistance change method. This method provided excellent performance of estimations. However, the method requires complicated electric circuits and uses a two-probe method: electric resistance at the electrodes has significant effect. To resolve these problems, an electrical voltage change method is adopted in the present study. Since the electrical voltage change method provides poor performance of estimations in our previous study, the present study employs a standardization method that has shown significant improvement of estimations for the electrical resistance change method. As a result, the electrical voltage change method shows good performance of estimations for delaminations located near the edges of the specimen and poor performance near the middle of the specimen. The zigzag shape has large effect on the performance of estimations for the delamination near the middle of the specimen. In this paper, two-stage delamination monitoring method that is not affected by the shape of delamination is proposed. The validity of this method is verified using the FEM analysis.

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