Print Email Facebook Twitter Effect of interlaying UV-irradiated PEEK fibres on the mechanical, impact and fracture response of aerospace-grade carbon fibre/epoxy composites Title Effect of interlaying UV-irradiated PEEK fibres on the mechanical, impact and fracture response of aerospace-grade carbon fibre/epoxy composites Author Quan, D. (TU Delft Structural Integrity & Composites) Deegan, Brian (Henkel Ireland Operations & Research Ltd.) Binsfeld, Lucas (University College Dublin) Li, Xiping (Zhejiang Normal University) Atkinson, Jason (University College Dublin) Ivanković, Alojz (University College Dublin) Murphy, Neal (University College Dublin) Date 2020-06-15 Abstract Poly-etherether-ketone (PEEK) fibres (average diameter 30μm) were surface-activated by a UV-irradiation technique, and then used as interlayers of carbon fibre/epoxy composites. The results of a flatwise tensile test demonstrated a significant improvement in the PEEK fibre/epoxy adhesion upon the UV-treatment, i.e. the ultimate strength increased from 0.6–0.7MPa to 7.6MPa. Accordingly, interlaying UV-irradiated PEEK fibres resulted in considerable increases in the maximum values of open-hole tensile strength, Charpy impact strength and mode-I fracture energy, i.e. of 12%, 131% and 293%, respectively. However, it also decreased the flexural strength by 29%, owing to the thickness increase caused by adding interlayers. Fortunately, the load carrying capacity (the maximum failure load under flexural bending) was largely unaffected, and moreover, an average residual strength of 475 ± 23MPa still remained after the damage at the maximum load. The results demonstrated significant benefits of using longitudinal UV-irradiated PEEK fibres as interlayers of CFRPs. Subject A: PEEK-fibre interlayersA: Polymer-matrix composites (PMCs)B: DelaminationD: Mechanical testingE: Surface treatment To reference this document use: http://resolver.tudelft.nl/uuid:f2382504-9bec-46ff-a56a-62f448fc3606 DOI https://doi.org/10.1016/j.compositesb.2020.107923 Embargo date 2022-03-13 ISSN 1359-8368 Source Composites Part B: Engineering, 191 Part of collection Institutional Repository Document type journal article Rights © 2020 D. Quan, Brian Deegan, Lucas Binsfeld, Xiping Li, Jason Atkinson, Alojz Ivanković, Neal Murphy Files PDF Effect_of_interlaying_UV_ ... osites.pdf 18.58 MB Close viewer /islandora/object/uuid:f2382504-9bec-46ff-a56a-62f448fc3606/datastream/OBJ/view