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Contribution à la conception des assemblages mécaniques utilisant des matériaux fortement dissipatifs

Abstract : Dynamics of complex structures with dissipative materials is an high stake for mechanical design and optimization. Polymeric materials are commonly used in this way. These materials are effective in various industry, but mastering their use comes up against technological limitations. One of these limitation is the characterization of mechanical properties as a function of frequency and this thesis deals with it. Two contributions are provided in this experimental research work. The first one concerns the time–temperature superposition principle. This principle makes it possible to extend the mechanical properties measured over a restricted frequency range from data obtained at different temperatures. This widespread method is unfortunately not valid for many polymeric materials. It is the reason why innovative structural adhesives are studied in order to characterize the limits of the principle of time-temperature equivalence. The approach is carried out using data from a dynamic mechanical analysis (DMA) conducted on a commercial test bench. The second contribution are part of the first one and represents the main objective of this thesis. An innovative DMA bench is developed for the characterization of polymers over wide frequency ranges without requirements of the principle of time-temperature equivalence. The bench performances are precisely assessed through a characterization campaign conducted on polymer adhesives.
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  • HAL Id : tel-02892490, version 1

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Adrien Chassaigne. Contribution à la conception des assemblages mécaniques utilisant des matériaux fortement dissipatifs. Mécanique des solides [physics.class-ph]. Université Paris-Saclay, 2020. Français. ⟨NNT : 2020UPASC020⟩. ⟨tel-02892490⟩

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