Mechanical properties of AFP-manufactured CF/PEEK vs CF/LM-PAEK ring coupons: Impact of process parameters on shear strength
Vincenzo IANNONE, Felice DE NICOLA, Giovangiuseppe GIUSTO, Mario COSTANTINI, Giovanni BRUNO, Pierpaolo CARLONE
Abstract. Carbon fiber-reinforced thermoplastic composites such as CF/PEEK and CF/LM-PAEK are increasingly utilized in aerospace applications for their outstanding mechanical properties, including high strength-to-weight ratios and environmental resistance. To fully exploit these advantages in complex aerospace components, advanced manufacturing techniques such as Automated Fiber Placement (AFP) are employed, enabling precise control over fiber orientation and consolidation. However, achieving optimal shear strength requires precise control of automated fiber placement process parameters. This study investigates the mechanical performance of two-layer CFRTP coupons in-situ consolidated using hot gas torch AFP. A Design of Experiments approach was employed, systematically varying deposition rates, heat source settings and compaction pressures. Statistical analysis of the experimental results highlights the influence of these parameters on the single lap shear strength. Using experimental data, linear regression models were developed to analyze the relationships between the shear strength and key process parameters, including laydown speed, pressure, and temperature profiles. The results reveal distinct behaviors between CF/PEEK and CF/LM-PAEK, providing insights into optimizing AFP manufacturing processes.
Keywords
AFP, CFRTP, Mechanical Testing, Advanced Manufacturing, SLS
Published online 5/7/2025, 10 pages
Copyright © 2025 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: Vincenzo IANNONE, Felice DE NICOLA, Giovangiuseppe GIUSTO, Mario COSTANTINI, Giovanni BRUNO, Pierpaolo CARLONE, Mechanical properties of AFP-manufactured CF/PEEK vs CF/LM-PAEK ring coupons: Impact of process parameters on shear strength, Materials Research Proceedings, Vol. 54, pp 429-438, 2025
DOI: https://doi.org/10.21741/9781644903599-47
The article was published as article 47 of the book Material Forming
Content from this work may be used under the terms of the Creative Commons Attribution 3.0 license. Any further distribution of this work must maintain attribution to the author(s) and the title of the work, journal citation and DOI.
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