Title: An Investigation of Laser Repass Annealing of LATP Processed CF/Peek Properties

Authors: A. Chanteli, R. M. O’Higgins, J. P. Canart, and P. M. Weaver

DOI: 10.33599/nasampe/c.19.0751

Abstract: There is increasing interest in high-performance fiber-reinforced thermoplastic composite materials, e.g. carbon fiber-reinforced PEEK, due to their excellent FST and high fracture toughness properties, as well as the opportunities that they offer for high-throughput, out-of-autoclave processing. Laser-assisted automatic tape placement (LATP) in-situ consolidation has been used to successfully produce large representative carbon fiber-reinforced (CF) PEEK aerospace demonstrators. However, it has been shown that the properties achieved depend on the processing parameters. Post-process annealing has been shown to increase the crystallinity level of PEEK and improve the mechanical properties. In this study, the effect of annealing by laser repass was investigated for LATP processed CF/PEEK laminates. Laminates were subjected to a number of laser passes post-layup and the effect of annealing was assessed by mechanical testing, specifically in-plane shear and open-hole compression testing. Laminate crystallinity was measured using differential scanning calorimetry (DSC). The study results were compared with autoclave consolidated laminates. The DSC results indicated that the laser repass annealing had a negligible effect on the laminate crystallinity, but there appeared to be some marginal effect on the laminate properties.

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Conference: CAMX 2019

Publication Date: 2019/09/23

SKU: TP19-0751

Pages: 10

Price: $20.00