Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 124, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2019.05.038
Keywords
Carbon nanotubes and nanofibers; 3-Dimensional reinforcement; Graphene; Fracture toughness
Funding
- Australian Research Council [LP140100645]
- Australian Research Council [LP140100645] Funding Source: Australian Research Council
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Through-thickness reinforcements using z-pins is a highly effective method for increasing the delamination resistance of fibre-polymer laminates. Here we report a hierarchical approach of incoporating carbon nanofillers and z-pins to further improve delamination toughness. The nanofillers include one-dimensional (1D) carbon nanofillers (e.g. carbon nanotubes, carbon nanofibres) or two-dimensional (2D) nanofillers (Le. graphene nanoplatelets). Results of the interlaminar fracture toughness reveal that 1D nanofillers induce synergistic (i.e. greater-than-additive) improvements to both modes I and II delamination resistance of z-pirmed laminates, whereas the 2D nanofiller show virtually no effect. Observations of the z-pin pull-out surfaces and the fracture surfaces reveal the main mechanisms why 1D nanofillers create a synergistic toughening effect, but not the 2D nanofillers.
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