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  • External compaction pressure over vacuum-bagged composite parts: Effect on the quality of flax fiber/epoxy laminates

    Author(s)
    Francucci, Gaston
    Palmer, Stuart
    Hall, Wayne
    Griffith University Author(s)
    Hall, Wayne
    Year published
    2018
    Metadata
    Show full item record
    Abstract
    acuum bagging allows the removal of trapped air between fabrics layers, extraction of moisture and volatiles, and optimization of the fiber-to-resin ratio. However, during vacuum bagging the compaction pressure is limited to atmospheric pressure, preventing the composite reaching higher fiber volumetric contents and also allows surface porosity to arise, affecting the esthetical appearance of the composite and also its mechanical performance. While the autoclave process has shown to solve these problems, the cost of the equipment is too high for many applications. In the present work, a series of experiments are carried out ...
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    acuum bagging allows the removal of trapped air between fabrics layers, extraction of moisture and volatiles, and optimization of the fiber-to-resin ratio. However, during vacuum bagging the compaction pressure is limited to atmospheric pressure, preventing the composite reaching higher fiber volumetric contents and also allows surface porosity to arise, affecting the esthetical appearance of the composite and also its mechanical performance. While the autoclave process has shown to solve these problems, the cost of the equipment is too high for many applications. In the present work, a series of experiments are carried out by compressing unidirectional flax/epoxy vacuum-bagged laminates in a hydraulic press at different pressures. The quality of the laminates is analyzed in terms of surface finish, internal void content, and mechanical properties. The additional compaction from hydraulic pressure is shown to be very effective in improving considerably the overall quality of the composites.
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    Journal Title
    Journal of Composite Materials
    DOI
    https://doi.org/10.1177/0021998317701998
    Note
    This publication has been entered into Griffith Research Online as an Advanced Online Version.
    Subject
    Composite and Hybrid Materials
    Aerospace Engineering
    Materials Engineering
    Mechanical Engineering
    Publication URI
    http://hdl.handle.net/10072/352520
    Collection
    • Journal articles

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