Fatigue life prediction of thick CFRP laminates with toughnened interlaminar layers in the out-of-plane direction at different stress ratio

Atsushi Hosoi, Shiwon Tsuge, Sen Seki, Yuzo Fujita, Ichiro Taketa, Hiroyuki Kawada

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

    Abstract

    The fatigue life of thick carbon fiber reinforced plastic (CFRP) laminates with toughened interlaminar layers in the out-of-plane direction was evaluated at different stress ratios. The spool shaped specimens were cut out the unidirectional thick CFRP laminates which pile up 88 plies of the prepreg with toughened interlaminar layer, T800S/3900-2B. The fatigue tests were conducted under the stress ratios of R = 0.1, -1, -3 and -6 to evaluate the effect of the stress ratio. As the results of the fatigue tests, the fatigue life of the specimens became shorter as the stress ratio became smaller, i.e. as the absolute values of the compressive stress became higher. It was found that the fatigue properties of the CFRP laminates in the out-of-plane direction are affected by the stress amplitude from the experimental results. In addition, the fatigue life under the different stress ratio was evaluated equivalently using the proposed model, modified H-κ model, which considers the strain energy. The analytical results showed good agreement with experimental results. In addition, the fatigue properties of the thick CFRP laminates in the out-of-plane direction were evaluated with the constant fatigue life diagram derived from the proposed model.

    Original languageEnglish
    Title of host publicationECCM 2016 - Proceeding of the 17th European Conference on Composite Materials
    PublisherEuropean Conference on Composite Materials, ECCM
    ISBN (Electronic)9783000533877
    Publication statusPublished - 2016
    Event17th European Conference on Composite Materials, ECCM 2016 - Munich, Germany
    Duration: 2016 Jun 262016 Jun 30

    Other

    Other17th European Conference on Composite Materials, ECCM 2016
    CountryGermany
    CityMunich
    Period16/6/2616/6/30

    Keywords

    • Constant fatigue life model
    • Fatigue
    • Out-of-plane
    • Stress ratio
    • Thick CFRP laminates

    ASJC Scopus subject areas

    • Ceramics and Composites

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