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  • Influence of double vacuum debulking process on co-cured soft-patch carbon fibre composite repairs

    Author(s)
    Chong, HM
    Wu, ZA
    Ng, SP
    Subramanian, AS
    Liu, T
    Feih, S
    Griffith University Author(s)
    Feih, Stefanie
    Year published
    2019
    Metadata
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    Abstract
    Reliable composite repair processes are a necessity to support the operation of next generation lightweight commercial aircraft. In-situ soft patch repairs of aerospace structures made from carbon fibre reinforced polymers require curing of conventional autoclave prepreg materials in an out-of-autoclave environment, which can result in poor repair quality. We demonstrate that the use of a double vacuum debulking (DVD) pre-curing step for soft patch repairs can essentially achieve void-free repairs for prepreg materials with moderate to high solvent residue. Porosity reductions translated into an increase in flexural and ...
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    Reliable composite repair processes are a necessity to support the operation of next generation lightweight commercial aircraft. In-situ soft patch repairs of aerospace structures made from carbon fibre reinforced polymers require curing of conventional autoclave prepreg materials in an out-of-autoclave environment, which can result in poor repair quality. We demonstrate that the use of a double vacuum debulking (DVD) pre-curing step for soft patch repairs can essentially achieve void-free repairs for prepreg materials with moderate to high solvent residue. Porosity reductions translated into an increase in flexural and interlaminar strength properties of 7.3% and 14.8%, respectively. The repair quality improvement due to void reduction in both soft patch and adhesive film resulted in a 19% increase in tensile repair strength. The work presented demonstrates the need to include a DVD pre-curing step to achieve the stringent manufacturers’ repair porosity limits and performance requirements for highly loaded composite aircraft structures.
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    Journal Title
    Composites Part B: Engineering
    Volume
    168
    DOI
    https://doi.org/10.1016/j.compositesb.2019.03.051
    Subject
    Engineering
    Publication URI
    http://hdl.handle.net/10072/409055
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    • Journal articles

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