Deconsolidation of C/PEEK blanks: On the role of prepreg, blank manufacturing method and conditioning

T.K. Slange, L.L. Warnet* (Corresponding Author), W.J.B. Grouve, R. Akkerman

*Corresponding author for this work

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    Abstract

    The combination of rapid automated lay-up and stamp forming has great potential for rapid manufacturing of lightweight load carrying components of thermoplastic composites. However, deconsolidation during blank heating is currently limiting the applicability of rapid lay-up blanks. This experimental work investigates the origin of deconsolidation in blanks produced by advanced fiber placement (AFP) versus traditional press consolidation. The influence of moisture on deconsolidation is investigated through deconsolidation experiments in a convection oven, as well as thermo-mechanical and residual gas analyses. The experiments revealed that thermal expansion of dissolved moisture is the main deconsolidation mechanism for press-consolidated blanks, but not for AFP blanks, which are suggested to deconsolidate mainly due to the release of frozen-in fiber stresses present in the used prepreg.

    Original languageEnglish
    Pages (from-to)189-199
    Number of pages11
    JournalComposites Part A: Applied Science and Manufacturing
    Volume113
    DOIs
    Publication statusPublished - 1 Oct 2018

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    Keywords

    • Residual/internal stress
    • Moisture
    • Deconsolidation
    • Advanced fiber placement (AFP)

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