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

    1 Citation (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 publicationProceedings of SPIE - The International Society for Optical Engineering
    Volume7522
    DOIs
    Publication statusPublished - 2010
    Event4th International Conference on Experimental Mechanics - Singapore
    Duration: 2009 Nov 182009 Nov 20

    Other

    Other4th International Conference on Experimental Mechanics
    CitySingapore
    Period09/11/1809/11/20

      Fingerprint

    Keywords

    • CFRP
    • FBG sensors
    • Physical aging
    • Residual strains

    ASJC Scopus subject areas

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

    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 Proceedings of SPIE - The International Society for Optical Engineering (Vol. 7522). [75223N] https://doi.org/10.1117/12.851692