Healing potential of hybrid materials for structural composites

The healing potential of light-weight hybrid composites consisting of S-glass and polypropylene fibres in an Araldite LY564 epoxy resin has been investigated. This paper describes a co-mingling process for creating glass–polypropylene hybrid yarns. Cross-ply laminates consisting of hybrid yarns in a...

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Bibliographic Details
Published in:Composite structures 2015-04, Vol.122, p.57-66
Main Authors: Selver, Erdem, Potluri, Prasad, Soutis, Costas, Hogg, Paul
Format: Article
Language:English
Subjects:
Composites
Compression after impact
Compression tests
Damage
Damage tolerance
Fibers
Fibres
Glass fiber reinforced plastics
Healing
Healing process
Heat treatment
Hybrid yarns
Impact resistance
Polypropylenes
Yarns
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Summary:The healing potential of light-weight hybrid composites consisting of S-glass and polypropylene fibres in an Araldite LY564 epoxy resin has been investigated. This paper describes a co-mingling process for creating glass–polypropylene hybrid yarns. Cross-ply laminates consisting of hybrid yarns in an epoxy matrix have been tested under low energy impact as well as compression after impact (CAI) loading conditions. The study examines the potential for healing the damage cracks developed during impact, with polypropylene fibres. Key part of this investigation is to evaluate the healing potential of polypropylene fibres through local heating. The study shows that with a simple heat treatment process, significant reduction in the impact induced damage area and a corresponding increase in the compression after impact strength can be achieved; a 65% strength improvement has been measured for the healed specimens when compared to unhealed specimen.
ISSN:0263-8223
1879-1085
DOI:10.1016/j.compstruct.2014.11.027