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Prédiction et modélisation des propriétés mécaniques des composites dentaires : approche expérimentale, théorique et numérique

Abstract : As tooth decays are the most widespread pathologies, dental restoration is a global public health problem. Manufacturers of dental composite resins must therefore offer increasingly high performance and lasting materials while meeting health recommendations. The development process is costly but could be improved by a better understanding of their mechanical behaviour and the development of theoretical and numerical predictive models for their properties. In this work, an experimental material is tested before and after accelerated ageing protocols (thermocycling). A detailed experimental protocol has been established so that the results are reproducible and comparable between them. Predictive models of the yield stress and the elastic modulus, initially proposed for other applications, are compared with experimental results and then adapted to the specificities of dental composites, with high filler ratios. The use of a numerical model of a composite material also makes it possible to enrich the experimental database by playing for instance on the modulus of the the components, without having to produce the materials. Despite some limits of this innovative approach, the comparison of experimental, theoretical and numerical results give promising outlooks. They allow to predict essential characteristics of composites in an easier way and to make direct links between macroscopic and microscopic properties. Finally the understanding of the ageing mechanisms was improved.
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https://pastel.archives-ouvertes.fr/tel-03284189
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Submitted on : Monday, July 12, 2021 - 2:00:29 PM
Last modification on : Thursday, September 1, 2022 - 11:06:06 AM
Long-term archiving on: : Wednesday, October 13, 2021 - 7:03:29 PM

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  • HAL Id : tel-03284189, version 1

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Yoan Boussès. Prédiction et modélisation des propriétés mécaniques des composites dentaires : approche expérimentale, théorique et numérique. Mécanique des matériaux [physics.class-ph]. Université Paris sciences et lettres, 2021. Français. ⟨NNT : 2021UPSLM013⟩. ⟨tel-03284189⟩

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