Time-dependent reduction of tensile strength caused by interfacial degradation under constant strain duration in UD-CFRP

Jun Koyanagi, Hiroshi Hatta, Fumio Ogawa, Hiroyuki Kawada

    Research output: Contribution to journalArticle

    18 Citations (Scopus)

    Abstract

    The residual strength in UD-CFRP was measured after being subjected to constant strain. In order to quantify the strength reduction, the time-dependent variation of interfacial stress-transfer capacity in a single-fiber composite specimen was quantitatively studied using micro-Raman spectroscopy. The analysis originally included a decrease of interfacial frictional stress due to a relaxation of interfacial radial stress and a time-dependency of an interfacial debonding propagation criterion, based on the conventional viscoelastic shear-lag model. The residual strength in UD-CFRP after enduring long-term loading was then analyzed using the global load sharing model with the results of variation of the interfacial property.

    Original languageEnglish
    Pages (from-to)3007-3026
    Number of pages20
    JournalJournal of Composite Materials
    Volume41
    Issue number25
    DOIs
    Publication statusPublished - 2007 Dec

    Fingerprint

    Carbon fiber reinforced plastics
    Tensile strength
    Degradation
    Debonding
    Raman spectroscopy
    Fibers
    Composite materials
    carbon fiber reinforced plastic

    Keywords

    • Interfacial debonding
    • Single-fiber composite
    • Tensile strength
    • Time-dependent degradation

    ASJC Scopus subject areas

    • Ceramics and Composites

    Cite this

    Time-dependent reduction of tensile strength caused by interfacial degradation under constant strain duration in UD-CFRP. / Koyanagi, Jun; Hatta, Hiroshi; Ogawa, Fumio; Kawada, Hiroyuki.

    In: Journal of Composite Materials, Vol. 41, No. 25, 12.2007, p. 3007-3026.

    Research output: Contribution to journalArticle

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