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self-healing of delamination fatigue cracks in carbon fibre-epoxy laminate using mendable thermoplastic

Pingkarawat, K, Wang, CH, Varley, Russell and Mouritz, AP 2012, self-healing of delamination fatigue cracks in carbon fibre-epoxy laminate using mendable thermoplastic, Journal of Materials Science, vol. 47, no. 10, pp. 4449-4456, doi: 10.1007/s10853-012-6303-8.

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Title self-healing of delamination fatigue cracks in carbon fibre-epoxy laminate using mendable thermoplastic
Author(s) Pingkarawat, K
Wang, CH
Varley, RussellORCID iD for Varley, Russell orcid.org/0000-0002-3792-1140
Mouritz, AP
Journal name Journal of Materials Science
Volume number 47
Issue number 10
Start page 4449
End page 4456
Total pages 7
Publisher Springer
Place of publication Amsterdam, The Netherlands
Publication date 2012-05
ISSN 0022-2461
1573-4803
Summary This article examines the self-healing repair of delamination damage in mendable carbon fibre–epoxy laminates under static or fatigue interlaminar loading. The healing of delamination cracks in laminates containing particles or fibres of the mendable thermoplastic poly[ethylene-co-(methacrylic acid)] (EMAA) was investigated. The results showed that the formation of largescale bridging zone of EMAA ligaments along the crack upon healing yielded a large increase (*300%) in the static mode I interlaminar fracture toughness, exceeding the requirement of full restoration. The mendable laminates retained high healing efficiency with multiple repair cycles because of the capability of EMAA to reform the bridging zone under static delamination crack growth conditions. Under fatigue loading, healing by the EMAA was found torestore the mode I fatigue crack growth resistance, with the rates of growth being slightly less than that pertinent to the unmodified laminate. The EMAA bridging zone, which generated high toughness under static loading conditions, does not develop under fatigue loading because of rapid fatigue failure of the crack bridging ligaments. Similar tothe multiple healing capability of EMAA under static loading, multiple healing of delamination fatigue cracks is confirmed, with the fatigue crack growth rates remaining approximately unchanged. This study shows that EMAA was capable of full recovery of fatigue crack growth resistance and superior healing efficiency for static loading.
Language eng
DOI 10.1007/s10853-012-6303-8
Field of Research 099999 Engineering not elsewhere classified
09 Engineering
03 Chemical Sciences
HERDC Research category C1.1 Refereed article in a scholarly journal
Copyright notice ©2012, Springer
Persistent URL http://hdl.handle.net/10536/DRO/DU:30089318

Document type: Journal Article
Collections: Institute for Frontier Materials
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