Evaluation of stress concentration caused by fibre failure using multi-fibre composites: Stress concentration factors and interfacial property

Souta Kimura, Teppei Kubota, Hiroyuki Kawada

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

    Abstract

    Stress concentration caused by a fibre failure is assessed by testing a multi-fibre model composite. The specimen consists of ECR-glass and Kevlar fibers embedded in a vinylester matrix, and the fibers are embedded parallel to each other at a constant distance. The vinylester/glass-fibre interfacial property is varied to investigate relationship between the interfacial property and stress concentration factor (SCF). Micro Raman spectroscopy (MRS) is used to directly capture the stress concentration profiles in the intact Kevlar fibre induced by a fibre break of ECR-glass fibre. From experimental results, the stress distribution of the Kevlar fibre is found to have its maximum values at two points which are adjacent to the fibre-break point and the interfacial debonding tip, respectively. An elasto-plastic shear-lag analysis is employed to predict the values of SCF, and the theoretical values of SCF are proved to be in good agreement with the experimental results. The values of SCF are found to be strongly affected by the interfacial property, and the optimal value of the interfacial strength is discussed.

    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

    Stress concentration
    Fibers
    Composite materials
    Glass fibers
    Debonding
    Raman spectroscopy
    Plastics
    Glass
    Testing

    Keywords

    • Interface and Raman spectroscopy
    • Stress concentrations

    ASJC Scopus subject areas

    • Ceramics and Composites

    Cite this

    Kimura, S., Kubota, T., & Kawada, H. (2008). Evaluation of stress concentration caused by fibre failure using multi-fibre composites: Stress concentration factors and interfacial property. In Advanced Composites for Efficiency and Environment - The US-Japan Conference on Composite Materials 2008, US-Japan 2008

    Evaluation of stress concentration caused by fibre failure using multi-fibre composites : Stress concentration factors and interfacial property. / Kimura, Souta; Kubota, Teppei; 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

    Kimura, S, Kubota, T & Kawada, H 2008, Evaluation of stress concentration caused by fibre failure using multi-fibre composites: Stress concentration factors and interfacial property. 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.
    Kimura S, Kubota T, Kawada H. Evaluation of stress concentration caused by fibre failure using multi-fibre composites: Stress concentration factors and interfacial property. In Advanced Composites for Efficiency and Environment - The US-Japan Conference on Composite Materials 2008, US-Japan 2008. 2008
    Kimura, Souta ; Kubota, Teppei ; Kawada, Hiroyuki. / Evaluation of stress concentration caused by fibre failure using multi-fibre composites : Stress concentration factors and interfacial property. Advanced Composites for Efficiency and Environment - The US-Japan Conference on Composite Materials 2008, US-Japan 2008. 2008.
    @inproceedings{e346b7ce8f6c4880b230a62d5df1dfe5,
    title = "Evaluation of stress concentration caused by fibre failure using multi-fibre composites: Stress concentration factors and interfacial property",
    abstract = "Stress concentration caused by a fibre failure is assessed by testing a multi-fibre model composite. The specimen consists of ECR-glass and Kevlar fibers embedded in a vinylester matrix, and the fibers are embedded parallel to each other at a constant distance. The vinylester/glass-fibre interfacial property is varied to investigate relationship between the interfacial property and stress concentration factor (SCF). Micro Raman spectroscopy (MRS) is used to directly capture the stress concentration profiles in the intact Kevlar fibre induced by a fibre break of ECR-glass fibre. From experimental results, the stress distribution of the Kevlar fibre is found to have its maximum values at two points which are adjacent to the fibre-break point and the interfacial debonding tip, respectively. An elasto-plastic shear-lag analysis is employed to predict the values of SCF, and the theoretical values of SCF are proved to be in good agreement with the experimental results. The values of SCF are found to be strongly affected by the interfacial property, and the optimal value of the interfacial strength is discussed.",
    keywords = "Interface and Raman spectroscopy, Stress concentrations",
    author = "Souta Kimura and Teppei Kubota and Hiroyuki Kawada",
    year = "2008",
    language = "English",
    booktitle = "Advanced Composites for Efficiency and Environment - The US-Japan Conference on Composite Materials 2008, US-Japan 2008",

    }

    TY - GEN

    T1 - Evaluation of stress concentration caused by fibre failure using multi-fibre composites

    T2 - Stress concentration factors and interfacial property

    AU - Kimura, Souta

    AU - Kubota, Teppei

    AU - Kawada, Hiroyuki

    PY - 2008

    Y1 - 2008

    N2 - Stress concentration caused by a fibre failure is assessed by testing a multi-fibre model composite. The specimen consists of ECR-glass and Kevlar fibers embedded in a vinylester matrix, and the fibers are embedded parallel to each other at a constant distance. The vinylester/glass-fibre interfacial property is varied to investigate relationship between the interfacial property and stress concentration factor (SCF). Micro Raman spectroscopy (MRS) is used to directly capture the stress concentration profiles in the intact Kevlar fibre induced by a fibre break of ECR-glass fibre. From experimental results, the stress distribution of the Kevlar fibre is found to have its maximum values at two points which are adjacent to the fibre-break point and the interfacial debonding tip, respectively. An elasto-plastic shear-lag analysis is employed to predict the values of SCF, and the theoretical values of SCF are proved to be in good agreement with the experimental results. The values of SCF are found to be strongly affected by the interfacial property, and the optimal value of the interfacial strength is discussed.

    AB - Stress concentration caused by a fibre failure is assessed by testing a multi-fibre model composite. The specimen consists of ECR-glass and Kevlar fibers embedded in a vinylester matrix, and the fibers are embedded parallel to each other at a constant distance. The vinylester/glass-fibre interfacial property is varied to investigate relationship between the interfacial property and stress concentration factor (SCF). Micro Raman spectroscopy (MRS) is used to directly capture the stress concentration profiles in the intact Kevlar fibre induced by a fibre break of ECR-glass fibre. From experimental results, the stress distribution of the Kevlar fibre is found to have its maximum values at two points which are adjacent to the fibre-break point and the interfacial debonding tip, respectively. An elasto-plastic shear-lag analysis is employed to predict the values of SCF, and the theoretical values of SCF are proved to be in good agreement with the experimental results. The values of SCF are found to be strongly affected by the interfacial property, and the optimal value of the interfacial strength is discussed.

    KW - Interface and Raman spectroscopy

    KW - Stress concentrations

    UR - http://www.scopus.com/inward/record.url?scp=84876764808&partnerID=8YFLogxK

    UR - http://www.scopus.com/inward/citedby.url?scp=84876764808&partnerID=8YFLogxK

    M3 - Conference contribution

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

    ER -