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Hierarchical mode I and mode II interlaminar toughening of Z-pinned composites using 1D and 2D carbon nanofillers
journal contributionposted on 2019-09-01, 00:00 authored by Anil Ravindran, R B Ladani, C H Wang, A P Mouritz
© 2019 Elsevier Ltd 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 (i.e. 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-pinned 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.