http://hdl.handle.net/10379/596 2017-10-29T23:49:26Z 2017-10-29T23:49:26Z Collet, Bernard Destrade, Michel http://hdl.handle.net/10379/5878 2016-06-11T01:00:14Z 2006-04-24T00:00:00Z

Onde de Love Piézoacoustique Collet, Bernard; Destrade, Michel Une sélection de résultats analytiques et numériques concernant la propagation d'ondes planes harmoniques guidées dans un bicouche piézoélectrique est présentée. L'étude effectuée concerne les modes transverses horizontaux (ondes de Love). L analyse repose sur l utilisation du formalisme de Stroh associé a la notion d impédance d interface. Les courbes de dispersion et les amplitudes des champs continus sont donnés et brievement commentés.

2006-04-24T00:00:00Z Destrade, Michel http://hdl.handle.net/10379/5857 2016-06-04T01:00:24Z 2006-01-01T00:00:00Z

Wireless communicative stent for follow-up of abdominal aortic aneurysm, Destrade, Michel IEEE An abdominal aortic aneurysm (AAA) is a dilatation of the aorta at the abdominal level, which rupture is a life threatening complication. Recent treatment of AAA consists in endovascular treatment with covered stent grafts. Despite improving devices, this treatment is still associated with close to 25% of failure related to persisting pressure into the excluded aneurismal sac. The follow-up becomes thus crucial and demands frequent examinations (CT-scan, IRM) which are not so liable given the complications. In order to evaluate the post-operative period of an AAA treatment, we designed a communicative stent, comprising of an integrated pressure sensor. This paper presents the conception of a communicative sensor, the elaboration of a numerical model, and the development of an experimental testbench constituting the aortic flux across an AAA and allowing the optimization and validation of the measurement principle.

2006-01-01T00:00:00Z Destrade, Michel Saccomandi, Giuseppe http://hdl.handle.net/10379/5733 2016-04-30T01:03:52Z 2008-01-01T00:00:00Z

A note about waves in dissipative and dispersive solids Destrade, Michel; Saccomandi, Giuseppe We study shear waves propagating in a special viscoelastic model proposed first by Fosdick and Yu in 1996. We deduce an asymptotic approximation which reduces the full balance equations to a system of evolution equations which are a vectorial generalization of the Modified KDV-Burger equation. In such a way we show that the model takes into account not only dissipative effects but also dispersive effects.

2008-01-01T00:00:00Z Destrade, Michel Saccomandi, Giuseppe http://hdl.handle.net/10379/5732 2016-04-30T01:03:51Z 2006-01-01T00:00:00Z

Waves and vibrations in a solid of second grade Destrade, Michel; Saccomandi, Giuseppe We study the viscoelastic second grade solid, for which the constitutive equation consists in the sum of a purely elastic part and a viscoelastic part; this latter part is specified by two microstructural coefficients α1 and α2, in addition to the usual Newtonian viscosity ν. We show via some exact solutions that such solids may describe some interesting dispersive effects. The solutions under investigation belong to special classes of standing waves and of circularly-polarized finite-amplitude waves.

2006-01-01T00:00:00Z