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Fracture behaviour of a rapidly cured polyethersulfone toughened carbon fibre/epoxy composite

journal contribution
posted on 2010-08-01, 00:00 authored by Steven Agius, Kevin Magniez, Bronwyn Fox
An out-of-autoclave rapid heating/low pressure technique has been used to cure polyethersulfone (PES) toughened HexPly 8552. Mode I and mode II tests were conducted to evaluate the fracture toughness of the composites and the effectiveness of cure was determined through thermal analysis. When compared to the autoclave process, the out-of-autoclave process resulted in a 52% reduction in processing time, without any sacrifice to the matrix intrinsic properties. Thermal analysis indicated an 8 °C improvement in glass transition temperature (Tg) as a result of an increased degree of cure. The out-of-autoclave process did lack in the ability to facilitate the removal of porosity which affected the fracture toughness results. The porosity is believed to have increased the mode I propagation fracture toughness. However its effect on mode II was quite deleterious, shown by scanning electron microscopy (SEM). This study managed to identify a number of key parameters associated with the out-of-autoclave process essential for further optimisation.

History

Journal

Composite structures

Volume

92

Issue

9

Pagination

2119 - 2127

Publisher

Elsevier

Location

Kidlington, England

ISSN

0263-8223

eISSN

1879-1085

Language

eng

Publication classification

C1 Refereed article in a scholarly journal

Copyright notice

2009, Elsevier Ltd.

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