Surface bonded optical fibre sensors for the inspection of CFRP plates using ultrasonic Lamb waves

Stephen Pierce, WR Philp, B Culshaw, Anthony Gachagan, Alistair McNab, Gordon Hayward, F Lecuyer

Research output: Contribution to journalArticle

45 Citations (Scopus)

Abstract

Surface-bonded single-mode optical fibre sensors have been used to monitor the interaction of ultrasonic S-0 lamb waves with defects in carbon iibre composite plates. Lamb waves were initiated using Perspex-coupled piezoelectric transducers. The defects investigated comprised holes, regions of impact damage and delaminations. Holes could be identified by analysing direct S-0 reflections and impact damage by S-0 back-waif echo amplitude. Large delaminations gave a poor direct S-0 reflection. Evidence was found for mode conversion at centre plane delaminations.
Original languageEnglish
Pages (from-to)776-787
Number of pages12
JournalSmart Materials and Structures
Volume5
Issue number6
DOIs
Publication statusPublished - Dec 1996

Keywords

  • fiber
  • ultrasonic Lamb waves
  • surface-bonded
  • optical fibre sensors
  • inspection
  • CFRP plates

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