Detection of ultrasonic lamb waves in composite plates using optical-fibres

Anthony Gachagan, Stephen Pierce, WR Philp, A McNab, Gordon Hayward, Brian Culshaw

Research output: Chapter in Book/Report/Conference proceedingConference contribution book

14 Citations (Scopus)

Abstract

This paper presents experimental results for a new condition monitoring system that uses a combination of piezoelectric and fibre-optic technologies as the active and passive elements respectively. Composite plate samples have been manufactured containing two groups of optical-fibres (typically four strands per group) embedded across the length of the plate. Polyimide coated 4/125 μm single-mode glass fibre has been utilised and connected to a portable 633 nm Mach-Zehnder fibre interferometer for signal demodulation and subsequent data acquisition. For this present work, 1-3 connectivity piezocomposite transducers have been used to generate a known Lamb wave within carbon fibre reinforced composite plate (CFRP) structures. The S0 mode was selected due to the relatively large in-plane motion and low dispersion characteristics. Results using both externally surface bonded fibres and embedded fibres are presented, for a range of defective plates. Defects ranging from 1 mm diameter holes through to significant delaminations have been detected at an ultrasonic operating frequency of 285 kHz
Original languageEnglish
Title of host publication1995 IEEE Ultrasonics Symposium, 1995. Proceedings
PublisherIEEE
Pages803-806
Number of pages4
ISBN (Print)0780329406
DOIs
Publication statusPublished - 1995
Event1995 IEEE Ultrasonics Symposium - , United Kingdom
Duration: 7 Nov 199510 Nov 1995

Conference

Conference1995 IEEE Ultrasonics Symposium
CountryUnited Kingdom
Period7/11/9510/11/95

Keywords

  • optical-fibres
  • ultrasonic Lamb waves
  • composite plates
  • ultrasonic materials testing
  • Mach-Zehnder interferometers
  • carbon fibre reinforced composites
  • delamination
  • fibre optic sensors
  • flaw detection
  • intelligent sensors
  • piezoelectric transducers
  • surface acoustic wave transducers

Fingerprint Dive into the research topics of 'Detection of ultrasonic lamb waves in composite plates using optical-fibres'. Together they form a unique fingerprint.

Cite this