Structural health monitoring of cracked aircraft panels repaired with bonded patches using fiber bragg grating sensors

Hideki Sekine, Shin Etsu Fujimoto, Tomonaga Okabe, Nobuo Takeda, Toshimitsu Yokobori

Research output: Contribution to journalArticlepeer-review

35 Citations (Scopus)

Abstract

Structural health monitoring of cracked aircraft panels repaired with bonded patches for extending the service life of aging aircraft has received wide attention. In this paper, the identification of the locations and shapes of fatigue crack and disbond fronts in aircraft panels repaired with double-sided bonded patches using fiber Bragg grating (FBG) sensors is studied. The identification is performed by minimizing the difference between the detected and calculated reflection spectra of FBG sensors at multiple positions on the free surface of patches. The validity and effectiveness of the identification in practical use is verified by comparing the identification results with the exact ones.

Original languageEnglish
Pages (from-to)87-98
Number of pages12
JournalApplied Composite Materials
Volume13
Issue number2
DOIs
Publication statusPublished - 2006 Mar

Keywords

  • Cracked aircraft panel
  • Identification of crack and disbond fronts
  • Improved tunneling method
  • Patch repair
  • Reflection spectrum of FBG sensor
  • Structural health monitoring

ASJC Scopus subject areas

  • Ceramics and Composites

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