Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 88, Issue -, Pages 131-139Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2016.04.014
Keywords
Carbon fibres; Laminates; Fracture; Fragmentation; Hybrid effect
Funding
- UK Engineering and Physical Sciences Research Council (EPSRC) [EP/I02946X/1]
- Imperial College, London
- Hungarian Academy of Sciences
- Janos Bolyai scholarship
- Hungarian National Research, Development and Innovation Office - NKFIH [OTKA K 116070]
- Engineering and Physical Sciences Research Council [EP/I02946X/1] Funding Source: researchfish
- EPSRC [EP/I02946X/1] Funding Source: UKRI
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Experimental results are presented which allow the hybrid effect to be evaluated accurately for thin ply carbon/epoxy-glass/epoxy interlayer hybrid composites. It is shown that there is an enhancement in strain at failure of up to 20% for very thin plies, but no significant effect for thicker plies. Hybrid specimens with thick carbon plies can therefore be used to measure the reference carbon/epoxy failure strain. The latter is significantly higher than the strain from all-carbon specimens in which there is an effect due to stress concentrations at the load introduction. Models are presented which illustrate the mechanisms responsible for the hybrid effect due to the constraint on failure at both the fibre and ply level. These results give a good understanding of how variability in the carbon fibre strengths can translate into hybrid effects in composite laminates. (C) 2016 The Authors. Published by Elsevier Ltd.
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