Results 71 to 80 of about 98,820 (198)

The Rayleigh-Lamb wave propagation in dielectric elastomer layers subjected to large deformations

, 2011
The propagation of waves in soft dielectric elastomer layers is investigated. To this end incremental motions superimposed on homogeneous finite deformations induced by bias electric fields and pre-stretch are determined.
Bar-Cohen, Bertoldi, Bustamante, Carpi, deBotton, Dorfmann, Dorfmann, Ericksen, Eringen, Eringen, Gal deBotton, Gal Shmuel, Kofod, Kovetz, Lamb, Lutianov, Massimiliano Gei, McMeeking, Mockensturm, Pelrine, Plante, Rayleigh, Suo, Tiersten, Tiersten, Toupin, Toupin, Yang, Zhu   +28 more
core   +1 more source

A nearly perfect omnidirectional shear-horizontal (SH) wave transducer based on a thickness poled, thickness-shear (d15) piezoelectric ring

, 2017
The fundamental shear horizontal (SH0) wave in plates is of great importance in the field of nondestructive testing (NDT) and structural health monitoring (SHM) since it is the unique non-dispersive guided wave mode.
Huan, Qiang, Li, Faxin, Miao, Hongchen
core   +1 more source

Ross Ice Shelf Displacement and Elastic Plate Waves Induced by Whillans Ice Stream Slip Events

Geophysical Research Letters
Ice shelves are assumed to flow steadily from their grounding lines to the ice front. We report the detection of ice‐propagating extensional Lamb (plate) waves accompanied by pulses of permanent ice shelf displacement observed by co‐located Global ...
Douglas A. Wiens, Richard C. Aster, Andrew A. Nyblade, Peter D. Bromirski, Peter Gerstoft, Ralph A. Stephen   +5 more
doaj   +1 more source

Propagation of Lamb waves in a pre-stained compressible elastic layer interaction with a layer of an ideal compressible fluid [PDF]

, 2015
Розглянуто задачу про поширення акустичних хвиль у попередньо деформованому стисливому пружному шарі, що взаємодіє з шаром ідеальної стисливої рідини.
Bahno, I., Bahno, O., Багно, Ірина Михайлівна   +2 more
core  

Unidirectional focusing for broadband Lamb guided wave based on mode conversion

Communications Physics
Metamaterials promise to revolutionize elastic devices, with applications spanning wireless communication, structural health monitoring and microfluidic technology.
Haifei Zhu, Xuan Zhang, Wenjie Liu, Houyou Long, Ying Cheng, Xiaojun Liu   +5 more
doaj   +1 more source

Numerical solution of Rayleigh-Lamb frequency equation for real, imaginary and complex wavenumbers

MATEC Web of Conferences, 2018
Guided waves, especially Lamb waves or shear-horizontal waves, are widely used types of waves for ultrasonic inspection of large structures. Well known property of guided waves is their dispersive character, which means that the propagation velocity of ...
Šofer Michal, Ferfecki Petr, Šofer Pavel   +2 more
doaj   +1 more source

An omnidirectional shear horizontal wave transducer based on ring array of face-shear (d24) piezoelectric ceramics

, 2016
The non-dispersive fundamental shear horizontal (SH0) wave in plate-like structures is of practical importance in non-destructive testing (NDT) and structural health monitoring (SHM).
Huan, Qiang, Li, Faxin, Miao, Hongchen, Wang, Qiangzhong   +3 more
core   +1 more source

Fibre Bragg Gratings in Embedded Microstructured Optical Fibres Allow Distinguishing between Symmetric and Anti-Symmetric Lamb Waves in Carbon Fibre Reinforced Composites

Sensors, 2017
Conventional contact sensors used for Lamb wave-based ultrasonic inspection, such as piezo-electric transducers, measure omnidirectional strain and do not allow distinguishing between fundamental symmetric and anti-symmetric modes. In this paper, we show
Ben De Pauw, Sidney Goossens, Thomas Geernaert, Dimitrios Habas, Hugo Thienpont, Francis Berghmans   +5 more
doaj   +1 more source

High-temperature high-sensitivity AlN-on-SOI Lamb wave resonant strain sensor

AIP Advances, 2018
A piezoelectric AlN-on-SOI structured MEMS Lamb wave resonator (LWR) is presented for high-temperature strain measurement. The LWR has a composite membrane of a 1 μm thick AlN film and a 30 μm thick device silicon layer.
Shaoxu Dou, Mengke Qi, Cong Chen, Hong Zhou, Yong Wang, Zhengguo Shang, Jing Yang, Dengpan Wang, Xiaojing Mu   +8 more
doaj   +1 more source

Non-Semisimple Degeneracy of Lamb Waves

Mechanics of Solids
Abstract Anomalous guided waves appearing at a non-semisimple degeneracy of the fundamental matrix are observed and analyzed in the framework of the Cauchy sextic formalism. The non-semisimple degeneracy condition is explicitly constructed for the most general case of Lamb waves propagating in a traction-free layer with
Karakozova, A. I., Kuznetsov, S. V.
openaire   +2 more sources