Thickness effects on fibre-bridged fatigue delamination growth in composites

Liaojun Yao, Hao Cui, R. C. Alderliesten, Yi Sun, Licheng Guo

Research output: Contribution to journalArticleScientificpeer-review

7 Citations (Scopus)
24 Downloads (Pure)

Abstract

This paper provides an investigation on thickness effects on fibre-bridged fatigue delamination growth (FDG) in composite laminates. A modified Paris relation was employed to interpret experimental fatigue data. The results clearly demonstrated that both thickness and fibre bridging had negligible effects on FDG behaviors. Both energy principles and fractography analysis were subsequently performed to explore the physical reasons of this independence. It was found that the amount of energy release of a given crack growth was not only independent of fibre bridging, but also thickness. Fibre print was the dominant microscopic feature located on fracture surfaces, physically making the same energy dissipation during FDG. Furthermore, the present study provides extra evidence on the importance of using an appropriate similitude parameter in FDG studies. Particularly, the strain energy release rate (SERR) range applied around crack front was demonstrated as an appropriate similitude parameter for fibre-bridged FDG study.

Original languageEnglish
Pages (from-to)21-28
Number of pages8
JournalComposites Part A: Applied Science and Manufacturing
Volume110
DOIs
Publication statusPublished - 1 Jul 2018

Keywords

  • A. Polymer-matrix composites (PMCs)
  • B. Delamination
  • B. Fatigue
  • Fibre bridging

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