Experimental characterization of dynamic tensile strength in unidirectional carbon/epoxy composites

Norihiko Taniguchi, Tsuyoshi Nishiwaki, Hiroyuki Kawada

    Research output: Contribution to journalArticle

    4 Citations (Scopus)

    Abstract

    This study aims to characterize the dynamic tensile strength of unidirectional carbon/epoxy composites. Two different carbon/epoxy composite systems, the unidirectional T700S/2500 and TR50S/modified epoxy, are tested at the static condition and the strain rate of 100 s-1. A high-strain-rate test was performed using a tension-type split Hopkinson bar technique with a specific fixture for specimen. The experimental results demonstrated that both tensile strength increase with strain rate, while the fracture behaviors are quite different. By the use of the rosette analysis and the strain transformation equations, the strain rate effects of material principal directions on tensile strength are investigated. It is experimentally found that the shear strain rate produces the more significant contribution to strain rate effect on dynamic tensile strength. An empirical failure criterion for characterizing the dynamic tensile strength was proposed based on the Hashin's failure criterion. Although the proposed criterion is just the empirical formula, it is in better agreement with the experimental data and quite simple.

    Original languageEnglish
    Pages (from-to)139-156
    Number of pages18
    JournalAdvanced Composite Materials
    Volume17
    Issue number2
    DOIs
    Publication statusPublished - 2008 Jun 1

    Fingerprint

    Strain rate
    Tensile strength
    Carbon
    Composite materials
    Shear strain
    Large scale systems

    Keywords

    • Carbon/epoxy composite
    • Failure criterion
    • Impact behavior
    • Split Hopkinson bar
    • Tensile strength

    ASJC Scopus subject areas

    • Ceramics and Composites

    Cite this

    Experimental characterization of dynamic tensile strength in unidirectional carbon/epoxy composites. / Taniguchi, Norihiko; Nishiwaki, Tsuyoshi; Kawada, Hiroyuki.

    In: Advanced Composite Materials, Vol. 17, No. 2, 01.06.2008, p. 139-156.

    Research output: Contribution to journalArticle

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