Search Results - "Lematre, Michael"

Enhancement of Guided Wave Detection and Measurement in Buried Layers of Multilayered Structures Using a New Design of V(z) Acoustic Transducers by Lematre, Michaël, Lethiecq, Marc

“…This paper presents the possibility of enhancement of the generation and detection of poorly energetic acoustic-guided waves in multilayered structures using a…”
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Elastic parameters characterization of multilayered structures by air-coupled ultrasonic transmission and genetic algorithm by Takahashi, Victor, Lematre, Michaël, Fortineau, Jérôme, Lethiecq, Marc

“…•Isotropic and anistropic samples characterized through transmission coefficient.•Genetic Algorithm vs Simplex.•Dispersion curve impact from thin layer coated…”
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Determination of Elastic Parameters of Thin Layers Used in Paintings by Air-Coupled Ultrasound Transmission Measurements Under Varying Incidence by Takahashi, Victor, Lematre, Michael, Fortineau, Jerome, Lethiecq, Marc

“…Paintings are intricate structures made up of multiple layers of materials that possess different properties and thicknesses. Due to their fragility, they can…”
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Modeling and numerical study of the influence of imperfect interface properties on the reflectance function for anisotropic multilayered structures by Loukkal, A., Lematre, M., Bavencoffe, M., Lethiecq, M.

“…The demand for the development of non-destructive techniques aiming to assess the reliability of adhesively bonded structures has greatly increased these…”
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Modeling of the Electromechanical Behavior of Barium Titanate Under Mechanical Stress and Comparison With Experimental Measurements by Lematre, Michael, Ul, Remy, Gratton, Michel, Tran-Huu-Hue, Louis-Pascal, Lethiecq, Marc

“…Barium titanate (BaTiO 3 ) is increasingly studied to replace lead-based piezoelectric materials, such as those which belong to the lead zirconate titanate…”
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Electromechanical Behavior of a Doped Barium Titanate Piezoceramic Under Mechanical Stress: Modeling and Comparison With Experimental Measurements by Lematre, Michael, Ul, Remy, Tran-Huu-Hue, Louis-Pascal, Lethiecq, Marc

“…Barium titanate (BaTiO 3 ) is being studied extensively to replace lead-based piezoelectric materials, such as the lead zirconate titanate (PZT) family, due to…”
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Internal Electric Field in Co-Doped BaTiO 3 With Co 2+/3+ , Nb 5+ , Li + , and F - : Impact on Functional Properties and Charge Compensation With Niobium and Fluorine Ions by Ul, Remy, Levassort, Franck, Lematre, Michael, Tran-Huu-Hue, Louis-Pascal, Pham-Thi, Mai

“…Dense barium titanate (BaTiO ) ceramics ( [Formula: see text]) with a microscale grain size are obtained at 800 °C-1100 °C by a solid-state ceramic process…”
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Internal Electric Field in Co-Doped BaTiO3 With Co2+/3+, Nb5+, Li+, and F−: Impact on Functional Properties and Charge Compensation With Niobium and Fluorine Ions by Ul, Remy, Levassort, Franck, Lematre, Michael, Tran-Huu-Hue, Louis-Pascal, Pham-Thi, Mai

“…Dense barium titanate (BaTiO 3 ) ceramics (<inline-formula> <tex-math notation="LaTeX">d_{\text {rel}} > 95{\%} </tex-math></inline-formula>) with a microscale…”
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Theoretical and experimental study of the electroacoustic behavior of lithium niobate under an initial mechanical stress by Domenjoud, Mathieu, Lematre, Mickaël, Gratton, Michel, Lethiecq, Marc, Tran-Huu-Hue, Louis-Pascal

“…Recently, a second-order formalism of piezoelectric structures under an external mechanical stress was developed. Because the yield strength of lithium niobate…”
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A non-invasive method of tendon force measurement by Pourcelot, Philippe, Defontaine, Marielle, Ravary, Bérangère, Lemâtre, Mickaël, Crevier-Denoix, Nathalie

“…The ability to measure the forces exerted in vivo on tendons and, consequently, the forces produced by muscles on tendons, offers a unique opportunity to…”
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Non-Contact Ultrasonic Exploration of Ancient Paintings by Takahashi, Victor, Fortineau, Jerome, Lematre, Michael, Lethiecq, Marc

“…Artwork are complex structures formed by multiple layers of materials with different properties and thicknesses. They are fragile structures and can be damaged…”
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Modeling and numerical study of the electroacoustic behavior of lithium niobate under an initial electrical stress by Domenjoud, Mathieu, Lematre, Michael, Fortineau, Jerome, Feuillard, Guy, Tran-Huu-Hue, Louis-Pascal

“…Recently, we developed a second order formalism of piezoelectric structures under an external stress. In this work, this formalism is used to numerically study…”
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Determination of elastic parameters in isotropic plates by using acoustic microscopy measurements and an optimization method by Lematre, M., Benmehrez, Y., Bourse, G., Xu, J.W., Ourak, M.

“…The determination of elastic constants in isotropic solids by line focus acoustic (LFA) microscopy is discussed. A velocity corresponding to a global resonance…”
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Acoustic microscopy measurement of elastic constants by using an optimization method on measured and calculated SAW velocities: effect of initial cij values on the calculation convergence and influence of the LFI transducer parameters on the determination of the SAW velocity by Lematre, M, Benmehrez, Y, Bourse, G, Xu, J.W, Ourak, M

“…The determination of elastic constants in anisotropic solids by line-focus acoustic microscopy (LFAM) is discussed. The velocity of leaky surface acoustic…”
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Airborne acoustic characterisation of cultural heritage paintings: A preliminary study by Takahashi, Victor, Fortineau, Jerome, Lemâtre, Michaël, LETHIECQ, Marc

“…In order to assess the health of cultural heritage paintings, for example prior to their restoration, visual inspections as well as techniques such as X-ray…”
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