Fatigue delamination behaviour of unidirectional carbon fibre/epoxy laminates reinforced by Z-Fiber® pinning
✍ Scribed by Denis D.R. Cartié; Jean-Martin Laffaille; Ivana K. Partridge; Andreas J. Brunner
- Publisher
- Elsevier Science
- Year
- 2009
- Tongue
- English
- Weight
- 764 KB
- Volume
- 76
- Category
- Article
- ISSN
- 0013-7944
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✦ Synopsis
Z-Pin reinforced carbon-fibre epoxy laminates were tested under Mode I and Mode II conditions, both quasi-statically and in fatigue. Test procedures were adapted from existing standard or pre-standard tests. Samples containing 2% and 4% areal densities of carbonfibre Z-pins (0.28 mm diameter) were compared with unpinned laminates. Quasi-static tests under displacement control yielded a dramatic increase of the apparent delamination resistance. Specimens with 2% pin density failed in Mode I at loads 170 N, equivalent to an apparent G IC of 2 kJ/m 2 . Fatigue testing under load control showed that the presence of the through-thickness reinforcement slowed down fatigue delamination propagation.