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| Naji, M. |
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| Motta, Antonella |
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| Aletan, Dirar |
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| Mohamed, Tarek |
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| Ertürk, Emre |
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| Taccardi, Nicola |
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| Kononenko, Denys |
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| Petrov, R. H. | Madrid |
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| Alshaaer, Mazen | Brussels |
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| Bih, L. |
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| Casati, R. |
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| Muller, Hermance |
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| Kočí, Jan | Prague |
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| Šuljagić, Marija |
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| Kalteremidou, Kalliopi-Artemi | Brussels |
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| Azam, Siraj |
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| Ospanova, Alyiya |
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| Blanpain, Bart |
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| Ali, M. A. |
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| Popa, V. |
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| Rančić, M. |
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| Ollier, Nadège |
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| Azevedo, Nuno Monteiro |
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| Landes, Michael |
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| Rignanese, Gian-Marco |
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Ni, Xinchen
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Topics
Publications (5/5 displayed)
- 2021In situ synchrotron computed tomography study of nanoscale interlaminar reinforcement and thin-ply effects on damage progression in composite laminatescitations
- 2020New interlaminar features and void distributions in advanced aerospace-grade composites revealed via automated algorithms using micro-computed tomographycitations
- 2019Static and fatigue interlaminar shear reinforcement in aligned carbon nanotube-reinforced hierarchical advanced compositescitations
- 2019Ultrahigh‐Areal‐Capacitance Flexible Supercapacitor Electrodes Enabled by Conformal P3MT on Horizontally Aligned Carbon‐Nanotube Arrayscitations
- 2018Synergetic effects of thin plies and aligned carbon nanotube interlaminar reinforcement in composite laminatescitations
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article
Static and fatigue interlaminar shear reinforcement in aligned carbon nanotube-reinforced hierarchical advanced composites
Abstract
High densities (>10 billion fibers per cm(2)) of aligned carbon nanotubes (A-CNTs) are used to reinforce the interlaminar resin-rich region of aerospace-grade unidirectional carbon microfiber plies in a hierarchical carbon fiber reinforced plastic (CFRP) laminate architecture. Such nano-engineered interfaces have been shown to increase interlaminar fracture toughness and substructural in-plane strengths, and here we show a 115% average increase in fatigue life across all load levels (60-90% of static strength), with a larger increase of 249% in high-cycle (at 60% of static strength) fatigue, despite no statistically significant increase in static strength. These findings are in agreement with a numerical damage progression model developed to simulate both interlaminar and intralaminar damage in the laminates, which shows the relative insensitivity of short-beam shear (SBS) strength to the enhancement of interlaminar fracture toughness, e.g., a 50% increase in interlaminar toughness yields an SBS strength increase of less than 20%. Consistent with observations of other CNT-reinforced epoxy architectures, larger improvements in fatigue life are noted in low-stress regimes (e.g., high-cycle fatigue) vs. in high-stress regimes (e.g., static and low-cycle fatigue), indicating a transition in dominant mechanisms from high-energy dissipation caused by CNT pullout to low-energy dissipation caused by CNT fracture as stress increases.