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Contribution à l'étude de micromuscles artificiels activables par pression osmotique et implantables en milieu biologique

Abstract : This work is a contribution to the development of artificial micromuscles lays on an innovating “in-vivo” way of energy conversion. The idea is to use the osmotic process to convert a chemical energy into a mechanical one. This study is generic as the potential biomedical applications might be numerous; it is based on the design of an inflatable semipermeable membrane structure (joined osmotic) intended to avoid endoleaks occurring from abdominal aorta aneurysm endoprosthesis. After presenting the osmotic phenomenon and the considered applications, the study breaks up into two parts.
• The first part carries on the osmo-mechanical characterization of the osmotic system water/cellulose-acetate membrane/saccharose. This was made possible thanks to the development of original experimental devices. Regarding the targeted range of use, the membrane's mechanical behavior is mainly elastoplastic and its permeability strongly depends on its strain state.
• In the second part, we develop a numerical model of the contact area between the aneurysm neck and the endoprosthesis equipped with an inflatable joint. The modeling of the membrane joint is based on the results of the first part. The mechanical behaviors of the endoprosthesis and the aorta are modelled on the basis of literature's result, respectively by a simple linear elastic isotropic law and an isotropic hyperelastic potential of Rivlin series. A parametric study then underlines the feasibility of this endoprosthesis and the influences of few design parameters on its performances.
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Contributor : Vincent Gaudin <>
Submitted on : Monday, September 3, 2007 - 6:10:55 PM
Last modification on : Thursday, November 19, 2020 - 3:54:38 PM
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  • HAL Id : tel-00169431, version 1




Vincent Gaudin. Contribution à l'étude de micromuscles artificiels activables par pression osmotique et implantables en milieu biologique. Sciences du Vivant [q-bio]. Université Joseph-Fourier - Grenoble I, 2007. Français. ⟨tel-00169431⟩



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