An investigation into the damage development of open hole specimens in fatigue

O. J. Nixon-Pearson*, G. P. McCombe, S. R. Hallett

*Corresponding author for this work

Research output: Chapter in Book/Report/Conference proceedingConference Contribution (Conference Proceeding)

1 Citation (Scopus)

Abstract

An extensive experimental program was carried out to investigate and understand the sequence of damage development throughout the life of open hole composite laminates loaded in tension-tension fatigue. Two quasi isotropic carbon/epoxy laminates, with stacking sequence [452/90 2/-452/02]S and [45/90/-45/0]2S were examined. These were selected on the basis that under quasi-static loading they respectively exhibited delamination dominated and fibre dominated failure modes. Specimens were fatigue loaded at 5Hz with various amplitudes to 1E6 cycles or catastrophic failure, which ever occurred first. For both laminates failure occurred by delamination. A number of tests were interrupted at various points as the stiffness dropped with increasing cycles. The interrupted test specimens were inspected using X-ray Computed Tomography (CT) scanning in order to accurately determine a sequence of damage events leading to failure.

Original languageEnglish
Title of host publicationECCM 2012 - Composites at Venice, Proceedings of the 15th European Conference on Composite Materials
PublisherEuropean Conference on Composite Materials, ECCM
ISBN (Print)9788888785332
Publication statusPublished - 1 Jan 2012
Event15th European Conference on Composite Materials: Composites at Venice, ECCM 2012 - Venice, United Kingdom
Duration: 24 Jun 201228 Jun 2012

Conference

Conference15th European Conference on Composite Materials: Composites at Venice, ECCM 2012
CountryUnited Kingdom
CityVenice
Period24/06/1228/06/12

Keywords

  • Carbon-fibre
  • Fatigue damage
  • Stress concentrations
  • Tomography

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