Inter-fibre failure of through-thickness reinforced laminates in combined transverse compression and shear loadload

Hao Cui*, António R. Melro, Mehdi Yasaee

*Corresponding author for this work

Research output: Contribution to journalArticle (Academic Journal)peer-review

4 Citations (Scopus)
155 Downloads (Pure)

Abstract

Extensive studies have been reported on the improvement of through-thickness reinforcement to inter-laminar performance of composite laminates; current understanding on the in-plane performance is relatively limited, although it is also concerned in industrial application. The influence of through-thickness reinforcement (Z-pinning) on the inter-fibre failure in compression of unidirectional laminates was investigated. Both unpinned and Z-pinned laminates were tested at four different off-axis angles, representing different combinations of transverse compression and in-plane shear stress. It was found that the stiffness of Z-pinned laminates decreased significantly in all off-axis angles. The failure strain and strength were reduced in shear dominated failure modes, while improved in the compression dominated failure modes by the presence of the Z-pins. A further investigation on the angle of failure plane was carried out and a comparison with analytical failure models is presented.

Original languageEnglish
Pages (from-to)48-57
Number of pages10
JournalComposites Science and Technology
Volume165
Early online date13 Jun 2018
DOIs
Publication statusPublished - 8 Sep 2018

Keywords

  • Fibre volume fracture
  • Inter-fibre failure
  • Strength
  • Z-pin

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