Influence of roughness in ultrasonic welding of carbon fiber/PEEK composites

Influence of roughness in ultrasonic welding of carbon fiber/PEEK composites

CARASSUS Fabrice, KORYCKI Adrian, GARNIER Christian, CHABERT France, YAHIAOUI Malik, DJILALI Toufik

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Abstract. In this work on ultrasonic welding of CF/PEEK composites, it was established that the surface roughness of the substrates has an influence on the interfacial strength of a joint. The joint resistance is lower when the roughness increases. Interestingly, a new characteristic time was found, named the healing plateau time (tHP), which is determined by the displacement versus time curves during ultrasonic welding. This time seems to be related to the shear strength of the joint. This is a major finding, because it appears as a non-destructive way of predicting the quality of welds. Besides, DNS test on CF/PEEK unidirectional composite pointed out 40% higher shear strength compared with SLS, performed on CF/PEEK substrates assembled with a 250 µm PEI integrated energy director. Ultrasonic welding was optimized to reach a performance close to the shear strength of bulk.

Keywords
Ultrasonic Welding, Composites, Roughness, Shear Strength

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: CARASSUS Fabrice, KORYCKI Adrian, GARNIER Christian, CHABERT France, YAHIAOUI Malik, DJILALI Toufik, Influence of roughness in ultrasonic welding of carbon fiber/PEEK composites, Materials Research Proceedings, Vol. 28, pp 1841-1850, 2023

DOI: https://doi.org/10.21741/9781644902479-199

The article was published as article 199 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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