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Du modèle matériau à la mécanique des systèmes : étude dynamique d'une liaison souple en silicone chargé de silice

Abstract : Thanks to their damping property, filled elastomers are commonly used to make antivibration devices. Nevertheless, their behavior is highly non-linear due to complex and coupled phenomema, such as Mullins effect and Payne effect. Thus, few models make it possible to predict the dynamical response of those devices for all kind of loading.
The main goal of this study is to build a constitutive model able to take into account of the Payne effet in order to better predict the dynamical response of filled elastomers under dynamical loading and then optimize the design of those devices regarding to their use. Then we went through a series of models from a behavior model to a surrogate model integrable in the model of a larger structure, such as an airplane for instance. To this aim, we made use of a reduction order model method, the APHR, to efficiently solve the parametric problem associated to the definition of the surrogate model. To characterize the material behavior, many dynamical tests have been carried out with different frequencies, strain amplitude and static strain on both shear and compression samples. Thanks to those tests, we were able to point out Payne effect features regarding to the different parameters.
Then, the aim was to be able to simulate those tests with a constitutive model in order to predict the dynamical response of filled elastomer especially in terms of rigidity and damping. That is why an hyperviscoplastic model : the DyMPPlEC model, based on the Qi-Boyce model, was enriched at "Centre des Matériaux". The model parameters of this model have been identified from the experimental tests and then the model has been checked on a real structure.
With this model we not only make it possible to take into account of the Payne effect in the prediction of the dynamical response but also to simulate the response of vibration loading with a non zero static level of strain. Furthermore, the Mullins effect is also predicted by the model.
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https://pastel.archives-ouvertes.fr/pastel-00584332
Contributor : Bibliothèque Mines Paristech <>
Submitted on : Friday, April 8, 2011 - 11:15:42 AM
Last modification on : Thursday, September 24, 2020 - 6:30:07 PM
Long-term archiving on: : Saturday, July 9, 2011 - 2:38:30 AM

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  • HAL Id : pastel-00584332, version 1

Citation

Florence Vincent. Du modèle matériau à la mécanique des systèmes : étude dynamique d'une liaison souple en silicone chargé de silice. Matériaux. École Nationale Supérieure des Mines de Paris, 2011. Français. ⟨NNT : 2011ENMP0005⟩. ⟨pastel-00584332⟩

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