Journal
COMPOSITES SCIENCE AND TECHNOLOGY
Volume 131, Issue -, Pages 110-122Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compscitech.2016.06.002
Keywords
Carbon fibres; Fracture toughness; Damage tolerance; Scanning electron microscopy (SEM); Bio-inspired
Categories
Funding
- EPSRC [EP/M002500/1]
- Royal Academy of Engineering
- Engineering and Physical Sciences Research Council [EP/M002500/1] Funding Source: researchfish
- EPSRC [EP/M002500/1] Funding Source: UKRI
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Bio-inspired patterns of micro-cuts perpendicular to the fibre direction in thin-ply CFRP laminates have been used to increase the translaminar fracture toughness of the material. An analytical model to predict the probability of bundle pull-out during translaminar crack propagation was developed and validated through an experimental parametric study. The model was used to design three hierarchical patterns of micro-cuts and the patterns have been tested using Compact Tension specimens. The increase in fracture toughness for the three patterns was +15%, +60% and +214% when compared with the baseline material, thereby demonstrating the potential of engineering the fracture surface in CFRPs through well-designed patterns of micro-cuts to improve the damage tolerance of the material. (C) 2016 Elsevier Ltd. All rights reserved.
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