Journal
COMPOSITES PART A-APPLIED SCIENCE AND MANUFACTURING
Volume 113, Issue -, Pages 189-199Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.compositesa.2018.06.034
Keywords
Residual/internal stress; Moisture; Advanced fiber placement (AFP); Deconsolidation
Funding
- Partnership Program of the Materials innovation institute M2i [F11.4.15563]
- ThermoPlastic composites Research Center (TPRC)
- Province of Overijssel for improving the regional knowledge position within the Technology Base Twente initiative
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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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