Characterization of melded carbon fibre/epoxy laminates

Corbett, Tim, Forrest, Mark, Le Gac, Pierre and Fox, Bronwyn 2007, Characterization of melded carbon fibre/epoxy laminates, Composites. Part A, Applied science and manufacturing, vol. 38, no. 8, pp. 1860-1871, doi: 10.1016/j.compositesa.2007.04.007.

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Title Characterization of melded carbon fibre/epoxy laminates
Author(s) Corbett, Tim
Forrest, Mark
Le Gac, Pierre
Fox, Bronwyn
Journal name Composites. Part A, Applied science and manufacturing
Volume number 38
Issue number 8
Start page 1860
End page 1871
Publisher Pergamon
Place of publication United Kingdom
Publication date 2007-08
ISSN 1359-835X
Keyword(s) A. carbon fibre
A. pre-preg
B. mechanical properties
E. melding
Summary ‘Melding’ is a novel in situ method for joining thermosetting composite structures, without the need of adhesives. Laminate joining is achieved using uncrosslinked resin matrix of the pre-preg. This study used Hexply914C pre-preg material to characterize melded CFRP structures produced using the melding method. A designated area of a laminate was maintained at temperatures below 40 °C retaining uncured (B-staged) material, while the remainder of the laminate was cured at 175 °C. After a 2.5 h cure cycle, the cured region showed a high degree of cure (0.88) and glass transition temperature (176 °C). The uncured area of the same laminate was cured in a second stage, simulating an in situ melded joint. By controlling the temperature and duration of the intermediate dwell and affecting minimum viscosity values prior to final cure, low values of porosity (<0.5%) were achieved. The mechanical properties of the resulting joint were consistent throughout the melded laminate. Flexural strength (1600 MPa), flexural modulus (100–105 MPa) and short beam strength (105–115 MPa) values observed where equivalent or greater than those found in the recommended autoclave cured control specimens. After the entire laminate was post cured, glass transition temperatures of 230 °C (peak tan δ) were observed in all areas of the laminate.
Language eng
DOI 10.1016/j.compositesa.2007.04.007
Field of Research 091202 Composite and Hybrid Materials
HERDC Research category C1 Refereed article in a scholarly journal
Copyright notice ©2007, Elsevier Ltd.
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Document type: Journal Article
Collections: Centre for Material and Fibre Innovation
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