Prediction of strength degradation of glass fiber under water environment using sub-critical crack growth model

Masahiro Kotani, Hiroyuki Kawada

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

    Abstract

    The mechanical properties of FRP are mainly dominated by the fiber-reinforcement and therefore practically influenced by the strength degradation of the glass fiber. In this paper, the strength degradation of embedded E-glass fiber in the single fiber composite (SFC) has been investigated under constant strain in water environment to represent the SCC of GFRP. The strength degradation of the embedded glass fiber was ascertained by fragmentation test after the constant strain test. It was clarified that the fiber strength degradation was to accelerate dramatically at elevated water temperature. Additionally, the degradation of the glass fiber strength has been quantified on the basis of microscopic SCC of the initial defects on the fiber surface using the sub-critical crack growth model. The proposed model showed good agreement with the fiber strength distribution from various experimental results.

    Original languageEnglish
    Title of host publicationAdvanced Composites for Efficiency and Environment - The US-Japan Conference on Composite Materials 2008, US-Japan 2008
    Publication statusPublished - 2008
    EventUS-Japan Conference on Composite Materials 2008, US-Japan 2008 - Tokyo
    Duration: 2008 Jun 62008 Jun 7

    Other

    OtherUS-Japan Conference on Composite Materials 2008, US-Japan 2008
    CityTokyo
    Period08/6/608/6/7

    Fingerprint

    Glass fibers
    Crack propagation
    Degradation
    Water
    Fibers
    Fiber reinforced materials
    fiberglass
    Mechanical properties
    Defects
    Composite materials
    Temperature

    Keywords

    • Fiber strength
    • GFRP
    • SCC
    • Water environment

    ASJC Scopus subject areas

    • Ceramics and Composites

    Cite this

    Kotani, M., & Kawada, H. (2008). Prediction of strength degradation of glass fiber under water environment using sub-critical crack growth model. In Advanced Composites for Efficiency and Environment - The US-Japan Conference on Composite Materials 2008, US-Japan 2008

    Prediction of strength degradation of glass fiber under water environment using sub-critical crack growth model. / Kotani, Masahiro; Kawada, Hiroyuki.

    Advanced Composites for Efficiency and Environment - The US-Japan Conference on Composite Materials 2008, US-Japan 2008. 2008.

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

    Kotani, M & Kawada, H 2008, Prediction of strength degradation of glass fiber under water environment using sub-critical crack growth model. in Advanced Composites for Efficiency and Environment - The US-Japan Conference on Composite Materials 2008, US-Japan 2008. US-Japan Conference on Composite Materials 2008, US-Japan 2008, Tokyo, 08/6/6.
    Kotani M, Kawada H. Prediction of strength degradation of glass fiber under water environment using sub-critical crack growth model. In Advanced Composites for Efficiency and Environment - The US-Japan Conference on Composite Materials 2008, US-Japan 2008. 2008
    Kotani, Masahiro ; Kawada, Hiroyuki. / Prediction of strength degradation of glass fiber under water environment using sub-critical crack growth model. Advanced Composites for Efficiency and Environment - The US-Japan Conference on Composite Materials 2008, US-Japan 2008. 2008.
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    AB - The mechanical properties of FRP are mainly dominated by the fiber-reinforcement and therefore practically influenced by the strength degradation of the glass fiber. In this paper, the strength degradation of embedded E-glass fiber in the single fiber composite (SFC) has been investigated under constant strain in water environment to represent the SCC of GFRP. The strength degradation of the embedded glass fiber was ascertained by fragmentation test after the constant strain test. It was clarified that the fiber strength degradation was to accelerate dramatically at elevated water temperature. Additionally, the degradation of the glass fiber strength has been quantified on the basis of microscopic SCC of the initial defects on the fiber surface using the sub-critical crack growth model. The proposed model showed good agreement with the fiber strength distribution from various experimental results.

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