Monitoring damage in holed CFRP laminates using embedded chirped FBG sensors

S. Yashiro, T. Okabe, N. Toyama, N. Takeda

Research output: Contribution to journalArticlepeer-review

43 Citations (Scopus)

Abstract

This study proposes a new approach to monitoring the damage process in holed CFRP laminates using an embedded chirped fiber Bragg grating (FBG) sensor. To this end, we experimentally and numerically investigated the damage process and the damage-induced changes in the spectrum shape. It was experimentally confirmed that multiple types of damage (e.g., splits, transverse cracks and delamination) appeared near a hole, and that the spectrum shape of the embedded chirped FBG sensor changed as the damage extended. Our proposed simulation for the reflection spectrum considering the damage agreed with the experiments. Furthermore, this study investigated the effect of each damage pattern on the changes in the spectrum shape. Finally, based on these discussions, we present simple damage identifications with the embedded chirped FBG for the holed CFRP laminates under completely unloaded conditions.

Original languageEnglish
Pages (from-to)603-613
Number of pages11
JournalInternational Journal of Solids and Structures
Volume44
Issue number2
DOIs
Publication statusPublished - 2007 Jan 15

Keywords

  • Delamination
  • FBG sensor
  • Finite element analysis
  • Polymer matrix composites
  • Smart materials

ASJC Scopus subject areas

  • Modelling and Simulation
  • Materials Science(all)
  • Condensed Matter Physics
  • Mechanics of Materials
  • Mechanical Engineering
  • Applied Mathematics

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