Delamination toughening of carbon fiber/epoxy laminates by hierarchical carbon nanotube-short carbon fiber interleaves

In this study, hierarchical short carbon fibers (SCFs) synthesized with carbon nanotubes (CNTs) were used as CNT-SCF interleaves to increase the mode I delamination fracture energy GIC of carbon fiber/epoxy (CF/EP) composite laminates. Even at a relatively low CNT-SCF areal density, 1.0 mg/cm2, GIC...

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Bibliographic Details
Published in:Composites science and technology 2017-03, Vol.140, p.46-53
Main Authors: Zhou, Helezi, Du, Xusheng, Liu, Hong-Yuan, Zhou, Huamin, Zhang, Yun, Mai, Yiu-Wing
Format: Article
Language:English
Subjects:
Carbon fiber reinforced plastics
Carbon fibers
Carbon nanotubes
Carbon-epoxy composites
Composite materials
Delamination
Epoxy resins
Failure mechanisms
Fracture toughness
Interface
Laminates
Nanotubes
Polymer-matrix composites (PMCs)
Structural hierarchy
Studies
Toughening
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Summary:In this study, hierarchical short carbon fibers (SCFs) synthesized with carbon nanotubes (CNTs) were used as CNT-SCF interleaves to increase the mode I delamination fracture energy GIC of carbon fiber/epoxy (CF/EP) composite laminates. Even at a relatively low CNT-SCF areal density, 1.0 mg/cm2, GIC (1.17 kJ/m2) was increased by 125% compared to the control laminates (0.52 kJ/m2), which is a very high value compared to those results obtained by other interleaving methods in CF/EP laminates. The toughening effects of SCFs in bulk epoxy and interleaved CF/EP laminates were also studied to better understand the failure mechanisms of the hierarchical CNT-SCF structure. SEM observations revealed synergistic toughening mechanisms in these CNT-SCF interleaved CF/EP laminates.
ISSN:0266-3538
1879-1050
DOI:10.1016/j.compscitech.2016.12.018