Hybrid effects in thin ply carbon/glass unidirectional laminates: accurate experimental determination and prediction

M.R. Wisnom, G. Czél, Y. Swolfs, M. Jalalvand, L. Gorbatikh, I. Verpoest

Research output: Contribution to journalArticle

  • 26 Citations

Abstract

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.

LanguageEnglish
Pages131-139
Number of pages9
JournalComposites Part A: Applied Science and Manufacturing
Volume88
Early online date26 Apr 2016
DOIs
StatePublished - 30 Sep 2016

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Laminates
Carbon
Glass
Composite materials
Carbon fibers
Stress concentration
Loads (forces)
Fibers

Keywords

  • A. carbon fibres
  • A. laminates
  • B. fracture
  • B. fragmentation
  • hybrid effect

Cite this

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abstract = "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.",
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Hybrid effects in thin ply carbon/glass unidirectional laminates : accurate experimental determination and prediction. / Wisnom, M.R.; Czél, G.; Swolfs, Y.; Jalalvand, M.; Gorbatikh, L.; Verpoest, I.

In: Composites Part A: Applied Science and Manufacturing, Vol. 88, 30.09.2016, p. 131-139.

Research output: Contribution to journalArticle

TY - JOUR

T1 - Hybrid effects in thin ply carbon/glass unidirectional laminates

T2 - Composites Part A: Applied Science and Manufacturing

AU - Wisnom,M.R.

AU - Czél,G.

AU - Swolfs,Y.

AU - Jalalvand,M.

AU - Gorbatikh,L.

AU - Verpoest,I.

PY - 2016/9/30

Y1 - 2016/9/30

N2 - 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.

AB - 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.

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KW - A. laminates

KW - B. fracture

KW - B. fragmentation

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