Evaluation of interfacial debonding process in single fibre composite using elasto-plastic shear-lag and FEM analyses

Souta Kimura, Jun Koyanagi, Takayuki Hama, Hiroyuki Kawada

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

    Abstract

    The interfacial fracture observed in fragmentation tests performed with a model of polymer-matrix composite is predicted using an elasto-plastic shear-lag analysis and shear strength criterion. Interfacial debonding propagation is significantly affected by plastic deformation in the vicinity of the interfacial debonding tip. Hence, the matrix is assumed to be an elasto-plastic material that deforms according to J2 flow theory. The theoretical prediction of the interfacial debonding process is compared with the experimental results, which leads the value of the interfacial shear strength. Our recent energy-balance scheme, including an energy dissipation induced by the plastic deformation around the debonding tip, is used to calculate an energy-release rate to propagate the interfacial debonding. To validate the theoretical values of interfacial properties, FEM analysis employing cohesive elements is conducted, in which the theoretically obtained interfacial properties are introduced as strength and fracture toughness of the cohesive elements. Numerical prediction of the interfacial debonding propagation was proved to be in good agreement with the experimental, which illustrates the validity of the theoretically obtained interfacial properties.

    Original languageEnglish
    Title of host publicationProgress of Composites 2008 in Asia and Australasia - Proceedings of the 6th Asian-Australasian Conference on Composite Materials, ACCM 2008
    Pages119-122
    Number of pages4
    Publication statusPublished - 2008
    Event6th Asian-Australasian Conference on Composite Materials: Progress of Composites 2008 in Asia and Australasia, ACCM 2008 - Kumamoto, Kyushu
    Duration: 2008 Sep 232008 Sep 26

    Other

    Other6th Asian-Australasian Conference on Composite Materials: Progress of Composites 2008 in Asia and Australasia, ACCM 2008
    CityKumamoto, Kyushu
    Period08/9/2308/9/26

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    Keywords

    • Elasto-plastic shear-lag analysis
    • FEM and Fragmentation test
    • Interface

    ASJC Scopus subject areas

    • Ceramics and Composites

    Cite this

    Kimura, S., Koyanagi, J., Hama, T., & Kawada, H. (2008). Evaluation of interfacial debonding process in single fibre composite using elasto-plastic shear-lag and FEM analyses. In Progress of Composites 2008 in Asia and Australasia - Proceedings of the 6th Asian-Australasian Conference on Composite Materials, ACCM 2008 (pp. 119-122)