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Etude de l'adhésion de composites thermoplastiques semi-cristallins; application à la mise en oeuvre par soudure

Abstract : This study contributes to a better understanding of the main phenomena (healing and crystallisation) involved in the adhesion of semi-crystalline thermoplastic composites (PEEK or PPS carbon fibre reinforced composites). It can help optimizing the tow placement process. A new experimental welding device has been developed and allows to separate process parameters such as time, temperature and pressure, and to explore their effects on welded sample quality, as measured by the wedge test (DCB). Crystallization kinetics under the same processing conditions were investigated experimentally and then modeled. Polymer relaxation times characterized by rheology were used to evaluate healing kinetics. Finally, the evolution during the process of the temperature at interface was studied experimentally and modeled in order to explain the measured differences in adhesion energy.
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https://tel.archives-ouvertes.fr/tel-00008449
Contributor : Jean-Florent Lamethe <>
Submitted on : Friday, February 11, 2005 - 1:00:48 PM
Last modification on : Wednesday, October 14, 2020 - 3:58:09 AM
Long-term archiving on: : Friday, April 2, 2010 - 9:09:10 PM

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  • HAL Id : tel-00008449, version 1

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Jean-Florent Lamethe. Etude de l'adhésion de composites thermoplastiques semi-cristallins; application à la mise en oeuvre par soudure. Matériaux. Université Pierre et Marie Curie - Paris VI, 2004. Français. ⟨tel-00008449⟩

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