Investigation of the effect of single wall carbon nanotubes on interlaminar fracture toughness of woven carbon fiber—epoxy composites
Autor: | James G. Ratcliffe, Thomas S. Gates, Enrique V. Barrera, S. J. V. Frankland, Jiang Zhu, Jaret C. Riddick, Dimitris C. Lagoudas, Piyush R. Thakre |
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Rok vydání: | 2011 |
Předmět: |
Strain energy release rate
Materials science Transfer molding Scanning electron microscope Mechanical Engineering Carbon nanotube Epoxy Composite laminates law.invention Fracture toughness Mechanics of Materials law visual_art Materials Chemistry Ceramics and Composites visual_art.visual_art_medium Composite material Thermoforming |
Zdroj: | Journal of Composite Materials. 45:1091-1107 |
ISSN: | 1530-793X 0021-9983 |
DOI: | 10.1177/0021998310389088 |
Popis: | Single wall carbon nanotubes (SWCNTs) were introduced in the interlaminar region of woven carbon fiber—epoxy composites and the mode-I delamination behavior was investigated. Pristine (P-SWCNT) and functionalized (F-SWCNT) nanotubes were sprayed in the mid-plane of these laminates and delamination was initiated using a teflon pre-crack insert. The composite laminates were produced using vacuum-assisted resin transfer molding process. The interlaminar fracture toughness (ILFT) represented by mode-I critical strain energy release rate (GIc) for the initiation of delamination was measured using double cantilever beam tests. The specimens with pristine nanotubes and functionalized nanotubes showed a small effect on the ILFT. The specimens with P-SWCNTs showed stable crack growth and the potential for enhanced crack bridging along with slightly higher GIc than F-SWCNT specimens. Scanning electron microscopy images showed enhanced fiber—matrix interfacial bonding in the specimens with F-SWCNTs. However, large unstable crack propagation was observed in these F-SWCNT specimens from load—displacement curves and crack propagation videos. This research helps in understanding the differences in mechanisms by addition of functionalized and unfunctionalized (pristine) nanotubes to the woven carbon fiber—epoxy matrix composite laminates. |
Databáze: | OpenAIRE |
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