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Communication dans un congrès

Optimal Computation of Guided Wave Propagation and Scattering in Pipeworks Comprising Elbows: Numerical and Experimental Validations and Parametric Studies

M. El Bakkali, A. Lhemery, B. Chapuis, F. Berthelot, Sébastien Grondel

Simulation tools of guided wave (GW) examination are developed at CEA to help inspection design and results interpretation. In a previous paper [M. El Bakkali, A. Lhemery, V. Baronian and F. Berthelot, (AIP Conf. Proc. 1581), pp. 332-9 (2014)], a model was developed to deal with GW propagation in…

41st Annual Review of Progress in Quantitative Nondestructive Evaluation, Jul 2014, Boise, United States. pp.746-753, ⟨10.1063/1.4914676⟩. ⟨cea-01852429⟩

Article dans une revue

On the use of tracking loops for low-complexity multi-path channel estimation in OFDM systems

Huaqiang Shu, Eric Pierre Simon, Laurent Ros

—This paper treats pilot aided multi-path channel estimation with tracking loops for OFDM systems under slow to moderate fading conditions. Recent works have presented theoretical results for the tuning of second-order and third-order tracking loops in the particular context of Jakes's Doppler…

Signal Processing, 2015, 117, pp.174-187. ⟨10.1016/j.sigpro.2015.05.012⟩. ⟨hal-01174265⟩

Article dans une revue

Sensing of liquid droplets with a scanning near-field microwave microscope

Kamel Haddadi, S. Gu, T. Lasri

We demonstrate a scanning near-field microwave microscope based on an interferometric technique for dielectric characterization in liquid media. The instrumentation combines a vector network analyzer, an interferometry-based matching network and an evanescent microwave coaxial probe. The…

Sensors and Actuators A: Physical , 2015, 230, pp.170-174. ⟨10.1016/j.sna.2015.04.028⟩. ⟨hal-03224663⟩

Chapitre d'ouvrage

Fundamental properties of phononic crystal

Yan Pennec, Bahram Djafari-Rouhani

Phononic crystals are periodic composite structures where the elastic and acoustic properties display a periodic variation in space. They are in general constituted by a periodic array of inclusions in a matrix. Due to their periodicity, they can exhibit absolute band gaps in which the propagation…

Phononic Crystals: Fundamentals and Applications, Springer New York, pp.23-50, 2015, 9781461493938; 9781461493921. ⟨10.1007/978-1-4614-9393-8_2⟩. ⟨hal-03508196⟩

Communication dans un congrès

Non-contact ultrasonic non-destructive techniques : state of the art and their use in civil engineering

Mariusz Kaczmarek, Bogdan Piwakowski, Radoslaw Drelich

Ultrasonic methods of testing of civil engineering materials in air where both transmission of waves into materials and reception of signals are contactless are reviewed. Short history, technical details and examples of applications of currently available methods are discussed. Keywords: ultrasound…

International Symposium on Non-Destructive Testing in Civil Engineering, NDT-CE 2015, Sep 2015, Berlin, Germany. 4 p. ⟨hal-04087510⟩

Article dans une revue

Design of Environmental Biosensor Based on Photonic Crystal Fiber with Bends Using Finite Element Method

Shyqyri Haxha, Ahmed Teyeb, Fathi Abdel Malek, Emmanuel Kofi Akowuah, Iyad Dayoub

In this paper, a biosensor based on photonic crystal fiber (PCF) is proposed and designed using Full-Vectorial Finite Element Method (FVFEM). The proposed PCF sensor consists of three concentric circles surrounding the core. The key optical sensor characteristics such as sensitivity, the field…

Optics and Photonics Journal, 2015, 05 (03), pp.69-78. ⟨10.4236/opj.2015.53006⟩. ⟨hal-03383011⟩

Article dans une revue

Dispersion curves of 2D rods with complex cross-sections: double orthogonal polynomial approach

J.G. Yu, Jean-Etienne Lefebvre, Ch. Zhang, Faniry Emilson Ratolojanahary

Orthogonal polynomial series approach has been used to analyze the guided wave propagation in structures for about 20 years. These structures have always one infinite dimension in the waveguiding direction and, sometimes a regular finite cross-section (axially infinite solid or hollow cylinder for…

Meccanica, 2015, 50 (1), pp.109-117. ⟨10.1007/s11012-014-0058-z⟩. ⟨hal-04080911⟩

Communication dans un congrès

Cristal phononique piézomagnétique à une dimension : contrôle de la propagation par inductance variable

Marie-Fraise Ponge, Jérôme Vasseur, Olivier Bou Matar, Anne-Christine Hladky, Bertrand Dubus

Cette étude concerne un cristal phononique à une dimension constitué d'un empilement de couches piézomagnétiques identiques. Chaque couche est entourée par une bobine connectée à une inductance extérieure. Les ondes élastiques longitudinales se propageant dans cette structure sont étudiées…

CFM 2015 - 22ème Congrès Français de Mécanique, Aug 2015, Lyon, France. ⟨hal-03445058⟩

Communication dans un congrès

High Frequency Acoustic Reflectometry for Solid/Liquid Interface Characterization: Application to Droplet Evaporation

Julien Carlier, Malika Toubal, Sizhe Li, Pierre Campistron, Dorothée Debavelaere-Callens, V. Thomy, Vincent Senez, Bertrand Nongaillard

Evolution of the local concentration in a 1 mL droplet of ethanol/water mixture during an evaporation process has been followed using high frequency acoustic reflectometry. This method has been developed for wetting characterization on micro/nanostructures and makes it possible to follow…

2015 ICU International Congress on Ultrasonics, May 2015, Metz, France. ⟨10.1016/j.phpro.2015.08.285⟩. ⟨hal-03280233⟩

Article dans une revue

A model to predict modal radiation by finite-sized sources in composite plates with account of caustics

Mathilde Stévenin, Alain Lhémery, Sébastien Grondel

The guided wave field generated by finite size transducers in a composite plate is studied. For isotropic plates, Fraunhofer-like approximations can be found in the literature. Similar approximations fail when the plate is anisotropic. A new calculation method is proposed. Based on a modal…

Physics Procedia, 2015, 70, pp.622-625. ⟨10.1016/j.phpro.2015.08.042⟩. ⟨cea-01753218⟩