Effects of microstructures of smart fiber composites on embedded fiber Bragg grating sensors

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Abstract

This paper presents the results of an investigation on the effects of composite microstructures on the spectral response of fiber Bragg grating (FBG) sensor embedded in smart carbon-epoxy fiber composite, based on the mechanical finite element analysis and optical coupled mode theory. The FBG sensors are embedded in the directions parallel or intersected to the axis of reinforcing carbon tows. It shows that FBG sensors have good linear spectral responses for axial loads in both cases of sensor arrangements, and their sensitivities are close to each other. For lateral compression loads, however, the parallel arrangement has much smaller effects on the spectra than that of intersected arrangement, and thus is proposed for the sensing applications.
Original languageEnglish
Pages (from-to)1319-1329
Number of pages11
JournalJournal of Reinforced Plastics and Composites
Volume22
Issue number14
DOIs
Publication statusPublished - 24 Sep 2003

Keywords

  • Coupled mode theory
  • Fiber Bragg gratings (FBGs) sensors
  • Finite element analysis

ASJC Scopus subject areas

  • Ceramics and Composites
  • Mechanics of Materials
  • Mechanical Engineering
  • Polymers and Plastics
  • Materials Chemistry

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