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

Michael R Wisnom; Gergely Czel; Yentl Swolfs; Meisam Jalalvand; L. Gorbatikh; Ignaas Verpoest

doi:10.1016/j.compositesa.2016.04.014

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

Michael R Wisnom^*, Gergely Czel, Yentl Swolfs, Meisam Jalalvand, L. Gorbatikh, Ignaas Verpoest

^*Corresponding author for this work

Research output: Contribution to journal › Article (Academic Journal) › peer-review

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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.

Original language	English
Pages (from-to)	131-139
Number of pages	9
Journal	Composites Part A: Applied Science and Manufacturing
Volume	88
Early online date	26 Apr 2016
DOIs	https://doi.org/10.1016/j.compositesa.2016.04.014
Publication status	Published - Sept 2016

Keywords

A. Carbon fibres
A. Laminates
B. Fracture
B. Fragmentation
Hybrid effect

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

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.",

keywords = "A. Carbon fibres, A. Laminates, B. Fracture, B. Fragmentation, Hybrid effect",

author = "Wisnom, {Michael R} and Gergely Czel and Yentl Swolfs and Meisam Jalalvand and L. Gorbatikh and Ignaas Verpoest",

year = "2016",

month = sep,

doi = "10.1016/j.compositesa.2016.04.014",

language = "English",

volume = "88",

pages = "131--139",

journal = "Composites Part A: Applied Science and Manufacturing",

issn = "1359-835X",

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TY - JOUR

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

T2 - accurate experimental determination and prediction

AU - Wisnom, Michael R

AU - Czel, Gergely

AU - Swolfs, Yentl

AU - Jalalvand, Meisam

AU - Gorbatikh, L.

AU - Verpoest, Ignaas

PY - 2016/9

Y1 - 2016/9

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.

KW - A. Carbon fibres

KW - A. Laminates

KW - B. Fracture

KW - B. Fragmentation

KW - Hybrid effect

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U2 - 10.1016/j.compositesa.2016.04.014

DO - 10.1016/j.compositesa.2016.04.014

M3 - Article (Academic Journal)

AN - SCOPUS:84971529400

SN - 1359-835X

VL - 88

SP - 131

EP - 139

JO - Composites Part A: Applied Science and Manufacturing

JF - Composites Part A: Applied Science and Manufacturing

ER -

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

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

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