Monitoring of internal residual strain changes in CFRP using FBG sensors

Shin Ichi Takeda, Jun Koyanagi, Shin Utsunomiya, Yuto Kinoshita, Yoshihiko Arao, Hiroyuki Kawada

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

2 Citations (Scopus)

Abstract

FBG (Fiber Bragg Grating) sensors were embedded into CFRP unidirectional composite laminates in a direction perpendicular to the carbon fiber. Residual strains after curing were evaluated by the reflection spectrum from the FBGs. The CFRP laminates were kept at 100 °C for monitoring of the residual strain change measured by the FBGs. Without mechanical loading, occurrence of physical aging was confirmed by the residual strain changes. The relationship between the influence of physical aging on residual strain and the thickness of the CFRP was almost linear.

Original languageEnglish
Title of host publicationFourth International Conference on Experimental Mechanics
DOIs
Publication statusPublished - 2010 Dec 1
Event4th International Conference on Experimental Mechanics - Singapore, Singapore
Duration: 2009 Nov 182009 Nov 20

Publication series

NameProceedings of SPIE - The International Society for Optical Engineering
Volume7522
ISSN (Print)0277-786X

Conference

Conference4th International Conference on Experimental Mechanics
CountrySingapore
CitySingapore
Period09/11/1809/11/20

Keywords

  • CFRP
  • FBG sensors
  • Physical aging
  • Residual strains

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Computer Science Applications
  • Applied Mathematics
  • Electrical and Electronic Engineering

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  • Cite this

    Takeda, S. I., Koyanagi, J., Utsunomiya, S., Kinoshita, Y., Arao, Y., & Kawada, H. (2010). Monitoring of internal residual strain changes in CFRP using FBG sensors. In Fourth International Conference on Experimental Mechanics [75223N] (Proceedings of SPIE - The International Society for Optical Engineering; Vol. 7522). https://doi.org/10.1117/12.851692