Early fatigue damage accumulation of CFRP Cross-Ply laminates considering size and stress level effects

Xi Li*, Rinze Benedictus, Dimitrios Zarouchas

*Corresponding author for this work

Research output: Contribution to journalArticleScientificpeer-review

4 Citations (Scopus)
41 Downloads (Pure)

Abstract

Ply-block size and stress level effect on accumulation of transverse cracks and delamination are investigated during early fatigue life of CFRP laminates. Tension-tension fatigue tests under different stress levels were performed for two cross-ply configurations. Edge observation with digital cameras, digital image correlation and acoustic emission were employed for in-situ damage monitoring. Transverse cracks were dominant for [0/902]s laminates with almost non-existent delamination, while different interactive levels between both damage mechanisms occurred for [02/904]s laminates. Poisson's ratio identifies whether early fatigue damage is dominant by transverse cracks or involves delamination. Cumulative AE energy is a helpful indicator of crack density.

Original languageEnglish
Article number106811
Number of pages14
JournalInternational Journal of Fatigue
Volume159
DOIs
Publication statusPublished - 2022

Keywords

  • Acoustic emission
  • Delamination
  • Poisson's ratio
  • Stiffness degradation
  • Transverse cracking

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