Influence of strand size and morphology on the mechanical performance of recycled CF/PEKK composites: Harnessing waste for aerospace secondary load-bearing applications

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dc.authoridozbek, yagiz/0000-0002-6194-1467
dc.contributor.authorOzbek, Yagiz
dc.contributor.authorAl-Nadhari, Abdulrahman
dc.contributor.authorEskizeybek, Volkan
dc.contributor.authorYildiz, Mehmet
dc.contributor.authorSas, Hatice Sinem
dc.date.accessioned2025-05-29T02:58:01Z
dc.date.available2025-05-29T02:58:01Z
dc.date.issued2025
dc.departmentÇanakkale Onsekiz Mart Üniversitesi
dc.description.abstractThe flexibility and precision of automated fiber placement (AFP) have made it a standard methodology in the aviation industry. However, the use of continuous slit tapes along component lengths generates significant waste. This waste presents an opportunity for recycling into secondary load-bearing structures, particularly in applications where components are not subjected to extreme working conditions. In this study, carbon fiber-reinforced polyetherketoneketone (CF/PEKK) strands are recycled into randomly oriented strand (ROS) panels using a costeffective, vacuum-assisted hot press process while maintaining aerospace-quality standards. Both long and short strand lengths, as well as shredded strands mimicking real-life industrial waste, are analyzed for their mechanical performance and geometric stability. Mechanical properties of the recycled CF/PEKK composites are evaluated through tensile, shear, compression, Izod impact, and dynamic mechanical analysis (DMA), using digital image correlation (DIC) for precise measurements. Additionally, topological 3D scanning is used to assess the geometric stability of the panels. Results indicate that short strands offer superior mechanical properties, while shredded strands perform comparably. This study makes a unique contribution by demonstrating the effective recycling of slit tape waste into high-performance composite materials, advancing sustainable practices in aerospace applications.
dc.description.sponsorshipScientific and Technological Research Council of Turkey (TUBITAK) [118C051]; Canakkale Onsekiz Mart University, the scientific research coordination unit [FYL-2020-3375]
dc.description.sponsorshipThis work is supported by the Scientific and Technological Research Council of Turkey (TUBITAK) under the grant of 2244 Research Projects Program (TUBITAK Project no: 118C051) and by Canakkale Onsekiz Mart University, the scientific research coordination unit, project no: FYL-2020-3375. The authors acknowledge Buse Atac for her valuable guidance on the Micro-CT imaging and post-processing.
dc.identifier.doi10.1016/j.compositesb.2025.112232
dc.identifier.issn1359-8368
dc.identifier.issn1879-1069
dc.identifier.scopus2-s2.0-85217753076
dc.identifier.scopusqualityQ1
dc.identifier.urihttps://doi.org/10.1016/j.compositesb.2025.112232
dc.identifier.urihttps://hdl.handle.net/20.500.12428/30242
dc.identifier.volume296
dc.identifier.wosWOS:001428610700001
dc.identifier.wosqualityQ1
dc.indekslendigikaynakWeb of Science
dc.indekslendigikaynakScopus
dc.language.isoen
dc.publisherElsevier Sci Ltd
dc.relation.ispartofComposites Part B-Engineering
dc.relation.publicationcategoryMakale - Uluslararası Hakemli Dergi - Kurum Öğretim Elemanı
dc.rightsinfo:eu-repo/semantics/closedAccess
dc.snmzKA_WOS_20250529
dc.subjectCF/PEKK
dc.subjectRecycling
dc.subjectReuse
dc.subjectRandomly oriented strand (ROS)
dc.subjectDigital image correlation
dc.subjectMechanical properties
dc.titleInfluence of strand size and morphology on the mechanical performance of recycled CF/PEKK composites: Harnessing waste for aerospace secondary load-bearing applications
dc.typeArticle

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