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

Research output: Contribution to journalArticleAcademicpeer-review

2 Citations (Scopus)

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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Polyether ether ketones
Fibers
Moisture
Ovens
Consolidation
Thermoplastics
Thermal expansion
Gases
Experiments
Heating
Composite materials
polyetheretherketone

Keywords

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

Cite this

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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.",
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