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Dynamic bridging mechanisms of through-thickness reinforced composite laminates in mixed mode delamination

Research output: Contribution to journalArticle

Original languageEnglish
Pages (from-to)24-33
Number of pages10
JournalComposites Part A: Applied Science and Manufacturing
Volume106
Early online date23 Nov 2017
DOIs
DateAccepted/In press - 22 Nov 2017
DateE-pub ahead of print - 23 Nov 2017
DatePublished (current) - 1 Mar 2018

Abstract

Delamination resistance of composite laminates can be improved with through-thickness reinforcement such as Z-pinning. This paper characterises the bridging response of individual carbon fibre/BMI Z-pins in mixed mode delamination at high loading rate using a split Hopkinson bar system. The unstable failure process in quasi-static tests, was also captured with high sampling rate instruments to obtain the complete bridging response. The energy dissipation of the Z-pins were analysed, and it was found that the efficacy of Z-pinning in resisting delamination growth decreased with an increase in mixed mode ratio, with a transition from pull-out to pin rupture occurring. The Z-pin efficacy decreased with loading rate for all mode mix ratios, due to the changing in failure surface with loading rate and rate-dependent frictional sliding.

    Research areas

  • A. Fracture toughness, B. Failure, C. Delamination, D. 3-Dimensional reinforcement

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  • Full-text PDF (accepted author manuscript)

    Rights statement: This is the author accepted manuscript (AAM). The final published version (version of record) is available online via ELSEVIER at https://www.sciencedirect.com/science/article/pii/S1359835X17304232#ak005 . Please refer to any applicable terms of use of the publisher.

    Accepted author manuscript, 1 MB, PDF-document

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