Effect of compression during post-treatment to improve the mechanical strength of printed carbon fiber/ PEKK composites
COMBETTES Julien, ABADIE Amandine, FAZZINI Marina, BORLENGHI Andrea, BOSSHARD Jonas, GARNIER Christian, DESSEIN Gilles, CHABERT France
download PDFAbstract. This work aims to understand the effect of consolidation on parts obtained by material-extrusion additive manufacturing process. Three plates were manufactured with carbon fiber/PEKK tapes. Two of them were consolidated under pressure at 334 and 360°C corresponding to the maximum of the melting peak and the end of the melting peak of PEKK respectively. Another plate did not undergo any post-treatment after printing, it is used as a reference. The parts were characterized to measure their porosity by density measurement and X-ray micro-computed tomography. Subsequently, short beam shear tests and dynamic mechanical analysis (DMA) tests were carried out to assess the influence of porosity on the mechanical strength of the plates. As expected, the interlaminar shear strength (ILSS) decreases when the porosity increases. The highest ILSS is obtained for the part consolidated at 360°C due to a lower porosity. The highest storage modulus is obtained for the part consolidated at 334°C whereas the loss factor indicates a lower glass transition for the same part. This could be explained by a lower degree of crystallinity as revealed by DSC, compared to the part consolidated at 360°C.
Keywords
Additive Manufacturing, Carbon Fiber, Composite, Porosity, Post-Treatment
Published online 4/19/2023, 10 pages
Copyright © 2023 by the author(s)
Published under license by Materials Research Forum LLC., Millersville PA, USA
Citation: COMBETTES Julien, ABADIE Amandine, FAZZINI Marina, BORLENGHI Andrea, BOSSHARD Jonas, GARNIER Christian, DESSEIN Gilles, CHABERT France, Effect of compression during post-treatment to improve the mechanical strength of printed carbon fiber/ PEKK composites, Materials Research Proceedings, Vol. 28, pp 1861-1870, 2023
DOI: https://doi.org/10.21741/9781644902479-201
The article was published as article 201 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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