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dc.contributor.advisorAtalla, Noureddinefr
dc.contributor.advisorSgard, Franckfr
dc.contributor.authorRenault, Améliefr
dc.date.accessioned2014-05-15T12:41:14Z
dc.date.available2014-05-15T12:41:14Z
dc.date.created2008fr
dc.date.issued2008fr
dc.identifier.isbn9780494528549fr
dc.identifier.urihttp://savoirs.usherbrooke.ca/handle/11143/1915
dc.description.abstractPoro-viscoelastic materials are well modelled with Biot-Allard equations. This model needs a number of geometrical parameters in order to describe the macroscopic geometry of the material and elastic parameters in order to describe the elastic properties of the material skeleton. Several characterisation methods of viscoelastic parameters of porous materials are studied in this thesis. Firstly, quasistatic and resonant characterization methods are described and analyzed. Secondly, a new inverse dynamic characterization of the same modulus is developed. The latter involves a two layers metal-porous beam, which is excited at the center. The input mobility is measured. The set-up is simplified compared to previous methods. The parameters are obtained via an inversion procedure based on the minimisation of the cost function comparing the measured and calculated frequency response functions (FRF). The calculation is done with a general laminate model. A parametric study identifies the optimal beam dimensions for maximum sensitivity of the inversion model. The advantage of using a code which is not taking into account fluid-structure interactions is the low computation time. For most materials, the effect of this interaction on the elastic properties is negligible. Several materials are tested to demonstrate the performance of the method compared to the classical quasi-static approaches, and set its limitations and range of validity. Finally, conclusions about their utilisation are given.fr
dc.language.isofrefr
dc.publisherUniversité de Sherbrookefr
dc.rights© Amélie Renaultfr
dc.subjectVibrationfr
dc.subjectAnisotropyfr
dc.subjectPorous materialsfr
dc.subjectElastic parametersfr
dc.titleCaractérisation mécanique dynamique de matériaux poro-visco-élastiquesfr
dc.typeThèsefr
tme.degree.disciplineGénie mécaniquefr
tme.degree.grantorFaculté de géniefr
tme.degree.levelDoctoratfr
tme.degree.namePh.D.fr


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