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Abstract
Dynamic impact onto laminated composite structures can lead to large-scale delamination. This can be mitigated by the introduction of through-thickness reinforcement, such as z-pins. Here, mode I & II and mixed-mode delamination tests have been designed and conducted at high loading rate, for both unpinned and Z-pinned coupons to study the effect of rate of loading. It was found that the Z-pins were not effective in delaying the dynamic crack initiation or resisting the dynamic propagation of delaminations shorter than 5 mm. However, the further growth of cracks was substantially delayed by Z-pinning, especially for the pure mode I and mode I dominated failure modes. On the other hand, the effectiveness of Z-pins in shear tests was relatively modest. The mode I dominated delamination resistance of Z-pinned laminates was found to be sensitive to the loading rate.
Original language | English |
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Article number | 105565 |
Number of pages | 12 |
Journal | Composites Part A: Applied Science and Manufacturing |
Volume | 125 |
Early online date | 1 Aug 2019 |
DOIs | |
Publication status | Published - 1 Oct 2019 |
Keywords
- Delamination
- Fracture mechanics
- Through-thickness reinforcement
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Dive into the research topics of 'Coupon scale Z-pinned IM7/8552 delamination tests under dynamic loading'. Together they form a unique fingerprint.Projects
- 1 Finished
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Understanding Delamination Suppression at High Deformation Rates in Through-Thickness Reinforced Laminated Composites
Hallett, S. R. (Principal Investigator)
31/03/15 → 30/09/18
Project: Research