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Modélisation micromécanique des élastomères chargés

Abstract : This work focuses on the micromechanical modeling of filled elastomers. The major question to be identified : firstly the influence of the properties of different phases (morphology and behavior) on the macroscopic response, and also to explore the mechanisms of interactions that take place within the micro-structure. To do this, we conducted a study at two scales of observations and using the numerical simulations based on homogenization. The first level corresponds to a mesoscopic scale for which we consider a representative elementary volume (REV), biphasic, consisting of a homogeneous dissipative inclusion (agglomerate) embedded in a hyperelastic matrix. The second level is at a smaller scale, to explore the behavior of an idealized agglomerate, consisting of infinitely rigid filler particles bounded together by a thin layer of rubber. This micro-structure is randomly generated by a random Voronoï polygons. Finite element calculations are performed in linear elasticity and nonlinear in the context of numerical homogenization using various localization techniques. The results show in particular that the assumption of affinity is not suitable for this type of micro-structures and the incompressibility of the rubber and its containment play an important role on the mechanical behavior of the agglomerate.
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https://tel.archives-ouvertes.fr/tel-00628202
Contributor : Farid Khedimi <>
Submitted on : Tuesday, October 25, 2011 - 2:02:56 PM
Last modification on : Thursday, January 23, 2020 - 6:22:03 PM

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  • HAL Id : tel-00628202, version 2

Citation

Farid Khedimi. Modélisation micromécanique des élastomères chargés. Mécanique [physics.med-ph]. Université Aix-Marseille I, 2011. Français. ⟨tel-00628202v2⟩

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