Effect of lay-up of sub-waveguide on transmission of S(o) mode from main waveguide to sub-waveguides.

abstract：:Single clouds of cavitation bubbles, driven by 254kHz focused ultrasound at pressure amplitudes in the range of 0.48-1.22MPa, have been observed via high-speed shadowgraphic imaging at 1×10(6) frames per second. Clouds underwent repetitive growth, oscillation and collapse (GOC) cycles, with shock-waves emitted periodi...

journal_title：Ultrasonics

authors： Johnston K,Tapia-Siles C,Gerold B,Postema M,Cochran S,Cuschieri A,Prentice P

更新日期：2014-12-01 00:00:00

abstract：:A cylindrical standing wave ultrasonic motor using bending vibration transducer was proposed in this paper. The proposed stator contains a cylinder and a bending vibration transducer. The two combining sites between the cylinder and the transducer locate at the adjacent wave loops of bending vibration of the transduce...

journal_title：Ultrasonics

authors： Liu Y,Chen W,Liu J,Shi S

更新日期：2011-07-01 00:00:00

abstract：:In order to investigate non-destructively the bonding between rough plates, the problem of Lamb waves propagating on a rough plate is addressed in this paper. Numerical analysis is performed on periodical gratings made of identical triangular grooves. If the surface profile is made up of grooves with one periodicity, ...

journal_title：Ultrasonics

authors： Leduc D,Morvan B,Hladky AC,Pareige P,Izbicki JL

更新日期：2006-12-22 00:00:00

abstract：:A coordinated theoretical, numerical and experimental study is carried out in an effort to interpret the characteristics of propagating guided Lamb wave modes in presence of a high-density (HD) core region in a honeycomb composite sandwich structure (HCSS). Initially, a two-dimensional (2D) semi-analytical model based...

journal_title：Ultrasonics

authors： Sikdar S,Banerjee S

更新日期：2016-09-01 00:00:00

abstract：:Most methods used to measure the thickness of thin liquid or solid surface films and coatings need access to the coated surface. In this work reflected ultrasonic pulses were used to measure a coating thickness from a solid back face. Piezoelectric transducers on the solid back face emitted ultrasound waves and receiv...

journal_title：Ultrasonics

authors： Kanja J,Mills R,Li X,Brunskill H,Hunter AK,Dwyer-Joyce RS

更新日期：2021-02-01 00:00:00

abstract：:Temperature control of hyperthermia treatments is generally implemented with multipoint feedback system comprised of phased-array transducer, which is complicated and high cost. Our simulations to the acoustic field induced by a self-focused concave spherical transducer (0.5MHz, 9cm aperture width, 8.0cm focal length)...

journal_title：Ultrasonics

authors： Hu J,Qian S,Ding Y

更新日期：2010-05-01 00:00:00

abstract：:Nonalcoholic fatty liver disease (NAFLD) is the most common chronic liver disease. Quantitative ultrasound facilitates clinical grading of hepatic steatosis (the early stage of NAFLD). However, the utility of quantitative ultrasound as a first-line method for community screening of hepatic steatosis remains unclear. T...

journal_title：Ultrasonics

authors： Chang TY,Chang SH,Lin YH,Ho WC,Wang CY,Jeng WJ,Wan YL,Tsui PH

更新日期：2021-03-01 00:00:00

abstract：:In this paper, the radial basis function (RBF) collocation method based on the nonlocal Eringen piezoelectricity theory is developed to compute the band structures of nanoscale multilayered piezoelectric phononic crystals taking account of nonlocal interface effects. Detailed calculations are performed for anti-plane ...

journal_title：Ultrasonics

authors： Yan Z,Wei C,Zhang C

更新日期：2017-01-01 00:00:00

abstract：:In the present paper, we report the first results concerning a centimetre cantilever driven through non-linear effects in thin magnetostrictive films. Bimorph centimetre beams (24 mm x 5 mm) were designed using 160 microns thick glass and 0.4 micron thick multilayer TbFe/Fe films deposited via RF sputtering, using sev...

journal_title：Ultrasonics

authors： Tiercelin N,Pernod P,Preobrazhensky V V,Le Gall H,Ben Youssef J

更新日期：2000-03-01 00:00:00

abstract：:In this paper, an improved touch probe sensor device for higher sensitivity and low contact force is reported. In order to improve the resolution, we have evaluated the sensitivity and fabricated a miniaturized sensor. The sensor transducer was 3 mm long and had higher resonance frequency. The resonance frequency of t...

journal_title：Ultrasonics

authors： Kanda T,Kurosawa MK,Higuchi T

更新日期：2002-05-01 00:00:00

abstract：:Elastography is an imaging technique based on strain estimation in soft tissues under quasi-static compression. The stress is usually created by a compression plate, and the target is imaged by an ultrasonic linear array. This configuration is used for breast elastography, and has been investigated both theoretically ...

journal_title：Ultrasonics

authors： Souchon R,Soualmi L,Bertrand M,Chapelon JY,Kallel F,Ophir J

更新日期：2002-05-01 00:00:00

abstract：:Influence of clustering of cavitation bubbles on multibubble sonoluminescence (MBSL) in standing wave fields is studied through measurement of MBSL intensity with a photomultiplier tube and observation of corresponding bubble behavior with a high-speed video camera and an intensified charge-coupled device one. It is c...

journal_title：Ultrasonics

authors： Hatanaka S,Yasui K,Kozuka T,Tuziuti T,Mitome H

更新日期：2002-05-01 00:00:00

abstract：:In this paper, dispersive behavior and band structure of SH waves in magnetic-electric (ME) periodically layered plate are investigated by the transfer matrix method. Two kinds of unit cell form, one is piezoelectric (PE)/piezomagnetic (PM)/PE, and the other is PM/PE/PM, are considered in detailed. A peculiar case of ...

journal_title：Ultrasonics

authors： Pang Y,Gao JS,Liu JX

更新日期：2014-07-01 00:00:00

abstract：:Periodic composite ultrasonic transducers offer many advantages but the periodic pillar architecture can give rise to unwanted modes of vibration which interfere with the piston like motion of the fundamental thickness mode. In this paper, viscoelastic loss is incorporated into a three-dimensional plane wave expansion...

journal_title：Ultrasonics

authors： Orr LA,Mulholland AJ,O'Leary RL,Hayward G

更新日期：2008-12-01 00:00:00

abstract：:This study investigated the effect of LIPUS on fracture healing when fractures were exposed to ultrasound at three axial distances: z=0 mm, 60 mm, and 130 mm. We applied LIPUS to rat fracture at these three axial distances mimicking the exposure condition of human fractures at different depths under the soft tissue. M...

journal_title：Ultrasonics

authors： Fung CH,Cheung WH,Pounder NM,de Ana FJ,Harrison A,Leung KS

更新日期：2014-03-01 00:00:00

abstract：:Acoustic wave interaction with non-bonded contacts was found to be inherently non-linear due to asymmetrical stiffness distribution across the interface. A diode-type non-linearity results in local static elastic fields inside the contact, which are shown to be a source of transient longitudinal and shear DC-acoustic ...

journal_title：Ultrasonics

authors： Korshak BA,Solodov IY,Ballad EM

更新日期：2002-05-01 00:00:00

abstract：:Estimation of the attenuation is important in medical ultrasound not only for correct time-gain compensation but also for tissue characterization. In this paper, the feasibility of a new method for attenuation estimation is tested. The proposed method estimates the attenuation by repeatedly solving the forward wave pr...

journal_title：Ultrasonics

authors： Ilyina N,Hermans J,Verboven E,Van Den Abeele K,D'Agostino E,D'hooge J

更新日期：2018-03-01 00:00:00

abstract：:This paper introduces a new beamformer, which combines the eigenspace based minimum variance (ESBMV) beamformer with a subarray coherence based postfilter (SCBP), for improving the quality of ultrasound plane-wave imaging. The ESBMV beamformer has been validated in improving the imaging contrast, but the difficulty in...

journal_title：Ultrasonics

authors： Zhao J,Wang Y,Yu J,Guo W,Li T,Zheng YP

更新日期：2016-02-01 00:00:00

abstract：:This paper establishes a model evaluating the signal loss of double transmitted acoustic beams through random rough liquid-solid surfaces based on Fresnel approximation and the phase-screen approximation. The numerical solution is replaced with a simple analytical solution through using the exponential substitution ap...

journal_title：Ultrasonics

authors： Chen Z,Yang L

更新日期：2011-01-01 00:00:00

abstract：:This paper presents a study on topology optimization of novel material microstructural configurations to achieve directional elastic wave propagation through maximization of partial band gaps. A waveguide incorporating a periodic-microstructure material may exhibit different propagation properties for the plane elasti...

journal_title：Ultrasonics

authors： He J,Kang Z

更新日期：2018-01-01 00:00:00

abstract：:An ultrasonic probe consisting of two optical fiber-based miniaturized transducers for wideband ultrasound emission and detection is employed for the characterization of in vitro biological tissues. In the probe, ultrasound generation is obtained by thermoelastic emission from patterned carbon films in Micro-Opto-Mech...

journal_title：Ultrasonics

authors： Vannacci E,Granchi S,Belsito L,Roncaglia A,Biagi E

更新日期：2017-03-01 00:00:00

abstract：:An ultrasonic backscattering model is developed for textured polycrystalline materials with orthotropic or trigonal grains of ellipsoidal shape. The model allows us to simulate realistic microstructures and orthotropic macroscopic material textures resulting from thermomechanical processing for a broad variety of mate...

journal_title：Ultrasonics

authors： Li J,Yang L,Rokhlin SI

更新日期：2014-09-01 00:00:00

abstract：:We demonstrate a new method for a real-time imaging of surface acoustic waves at frequencies up to 1 GHz with picosecond temporal and micron spatial resolutions using an ultrafast optical pump and probe technique combined with a common path interferometer. Using samples with isotropic or anisotropic substrates coated ...

journal_title：Ultrasonics

authors： Sugawara Y,Wright OB,Matsuda O,Gusev VE

更新日期：2002-05-01 00:00:00

abstract：:Our study aims at the creation of a numerical toolbox that describes wave propagation in samples containing internal contacts (e.g. cracks, delaminations, debondings, imperfect intergranular joints) of known geometry with postulated contact interaction laws including friction. The code consists of two entities: the co...

journal_title：Ultrasonics

authors： Delrue S,Aleshin V,Truyaert K,Bou Matar O,Van Den Abeele K

更新日期：2018-01-01 00:00:00

abstract：:Recent achievements of nonlinear acoustics concerning the realization of solitons and solitary waves in crystals and their surfaces attained by nanosecond and picosecond laser ultrasonics are discussed and compared. The corresponding pump-probe setups are described, which allow an all-optical contact-free excitation a...

journal_title：Ultrasonics

authors： Hess P,Lomonosov AM

更新日期：2010-02-01 00:00:00

abstract：:Knowing the low-frequency response of hydrophones, down to 100 kHz at least, is important for accurate biomedical ultrasound measurements. However, current international standards do not extend below 500 kHz. Furthermore, commercial hydrophone sources typically do not supply sensitivity data below 1-2 MHz. Therefore, ...

journal_title：Ultrasonics

authors： Harris GR,Gammell PM,Lewin PA,Radulescu EG

更新日期：2004-04-01 00:00:00

abstract：:Guided waves propagating in cylindrical tubes are frequently applied for the characterization of material or geometrical properties of tubes. In a tube, guided waves can propagate in the axial direction and called axial guided waves, or in the circumferential direction called circumferential guided waves. Dispersion s...

journal_title：Ultrasonics

authors： Yeh CH,Yang CH

更新日期：2011-05-01 00:00:00

abstract：:Conventionally, the ultrasonic polar scan (UPS) records the amplitude or time-of-flight in transmission using short ultrasonic pulses for a wide range of incidence angles, resulting in a fingerprint of the critical bulk wave angles of the material at the insonified spot. Here, we investigate the use of quasi-harmonic ...

journal_title：Ultrasonics

authors： Kersemans M,Martens A,Van Den Abeele K,Degrieck J,Pyl L,Zastavnik F,Sol H,Van Paepegem W

更新日期：2015-04-01 00:00:00

abstract：:The correlation between ultrasonic wave propagation and polycrystalline microstructures has significant implications in nondestructive evaluation. An original numerical approach using the finite element method to quantify in both time and frequency domains the ultrasonic noise scattering due to the elastic heterogenei...

journal_title：Ultrasonics

authors： Bai X,Tie B,Schmitt JH,Aubry D

更新日期：2018-07-01 00:00:00

abstract：:In this paper, we propose a semi-analytical isogeometric analysis(S-IGA) approach in the twist space to investigate the dispersive properties in helical thread waveguides, which combines the advantages of the spectral approach and IGA. The convergence and accuracy of the proposed method are discussed, by comparing S-I...

journal_title：Ultrasonics

authors： Liu Y,Han Q,Liang Y,Xu G

更新日期：2018-02-01 00:00:00