Monitoring mode II fracture behaviour of composite laminates using embedded fiber-optic sensors

Hang Yin Ling, Kin Tak Lau, Zhongqing Su, Eric Tsun Tat Wong

Research output: Journal article publicationJournal articleAcademic researchpeer-review

19 Citations (Scopus)

Abstract

Utilization of embedded Fiber Bragg Grating (FBG) sensors for monitoring mode II fracture behaviour of composite laminate beams containing different delaminations along the thickness-wise direction, by virtue of End-Notch Flexure (ENF) tests, is presented. Non-uniform strain distribution due to the stress concentration at the delamination tip was examined by the way of observing the reflection spectrum from the FBG sensor. The stress concentration in ENF specimens, which are subjected to various applied loads, was analyzed in terms of the shift, shape, bandwidth and intensity of the reflection spectrum. Relationships between the load-displacement graphs and the corresponding reflection spectra under ENF tests were established. In addition, the feasibility and reliability of using the embedded FBG sensors for mode II fracture behaviour monitoring in the composite laminates is discussed.
Original languageEnglish
Pages (from-to)488-497
Number of pages10
JournalComposites Part B: Engineering
Volume38
Issue number4
DOIs
Publication statusPublished - 1 Jun 2007

Keywords

  • A. Glass fibres
  • A. Laminates
  • B. Delamination
  • D. Non-destructive testing

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering
  • Industrial and Manufacturing Engineering

Cite this