Journal
POLYMER TESTING
Volume 32, Issue 2, Pages 402-412Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.polymertesting.2012.10.012
Keywords
Nanocomposite; Interlaminar fracture; Damage mechanics; Fiber composites; Filament winding; Fibre volume fraction
Funding
- Arkema Inc., USA
- Kamenny Vek, Russia
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The effect of nano-reinforcements on fracture behaviour of bulk epoxy nanocomposites and mode-I interlaminar fracture toughness of filament-wound basalt fibre-reinforced laminates was studied. Fracture energy of the bulk epoxy nanocomposites significantly increased with acrylic tri-block-copolymer addition but remained unchanged with incorporation of nanoclay. Delamination fracture toughness was not influenced by the presence of nanoparticles in the matrix. Decreasing fibre volume fraction, on the other hand, significantly improved interlaminar fracture energy. Rigid fibres in these composites constrict the stress field ahead of the crack-tip. Hence, increasing resin content enhanced composite delamination energy by increasing the capacity for matrix deformation. Interlaminar crack propagation through the composite was observed to occur mainly by interfacial failure and matrix cracking. (C) 2012 Elsevier Ltd. All rights reserved.
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