Theoretical and experimental investigation of fluid rheology effects on modulated ultrasound propagation.

abstract：:Lamb waves are being investigated extensively for structural health monitoring (SHM) because of their characteristics of traveling long distances with little attenuation and sensitivity to minor local damage in structures. However, Lamb waves are dispersive, which results in the complex overlap of waveforms in the dam...

journal_title：Ultrasonics

authors： Wang W,Bao Y,Zhou W,Li H

更新日期：2018-07-01 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：:We analyze experimentally and theoretically the sound propagation velocity of P-waves in granular media made of micrometer-size magnetite particles under an external magnetic field. The sound velocity is measured in a coherent (long-wavelength) regime of propagation after a controlled sample preparation consisting of ...

journal_title：Ultrasonics

authors： Botello FR,Quintanilla MAS,Castellanos A,Grekova EF,Tournat V

更新日期：2018-01-01 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：:This paper deals with the influence of acousto-optic interactions on the displacement measurements performed over transducer array and their effects on the predicted diffraction field. Changes on the temporal/spatial responses and the plane wave decomposition of the displacement are discussed. Modifications made on th...

journal_title：Ultrasonics

authors： Certon D,Ferin G,Bou Matar O,Guyonvarch J,Remenieras JP,Patat F

更新日期：2004-04-01 00:00:00

abstract：:In this study, we present a model study of guided wave dispersion and resonance behavior of an array of piezoelectric plates with arbitrary cross-sections. The objective of this work is to analyze the influence of the geometry of an element of a 1D-array ultrasound transducer on generating multi-resonance frequency so...

journal_title：Ultrasonics

authors： Cortes DH,Datta SK,Mukdadi OM

更新日期：2010-03-01 00:00:00

abstract：:We present a method to generate sub-microsecond quasi-unipolar pressure pulses. Our approach is based on the laser irradiation of a thin copper wire submerged in water. The acoustic waveforms were recorded using two different, well characterized, wideband detection techniques: piezoelectric and optical interferometry....

journal_title：Ultrasonics

authors： González MG,Riobó LM,Ciocci Brazzano L,Veiras FE,Sorichetti PA,Santiago GD

更新日期：2019-09-01 00:00:00

abstract：:Ultrasound wave propagation in nanofluids and its rheological behavior has been studied as a function of solid volume fraction, temperature and magnetic field for magnetic nanofluids synthesized in kerosene and transformer oil. Ultrasonic velocity decreases while viscosity increases with increasing volume fraction. Th...

journal_title：Ultrasonics

authors： Patel JK,Parekh K

更新日期：2015-01-01 00:00:00

abstract：:Experimental studies of thermal effects in high-intensity focused ultrasound (HIFU) procedures are often performed with the aid of fine wire thermocouples positioned within tissue phantoms. Thermocouple measurements are subject to several types of error which must be accounted for before reliable inferences can be mad...

journal_title：Ultrasonics

authors： Dasgupta S,Banerjee RK,Hariharan P,Myers MR

更新日期：2011-02-01 00:00:00

abstract：:In spite of many advances in analytical and numerical modeling techniques for solving different engineering problems, an efficient solution technique for wave propagation modeling of an electromagnetic acoustic transducer (EMAT) system is still missing. Distributed point source method (DPSM) is a newly developed semi-...

journal_title：Ultrasonics

authors： Eskandarzade M,Kundu T,Liebeaux N,Placko D,Mobadersani F

更新日期：2010-05-01 00:00:00

abstract：:Ultrasound evaluation permits the state of rocks to be determined quickly and cheaply, satisfying the demands faced by today's producers of ornamental stone, such as environmental sustainability, durability and safety of use. The basic objective of the present work is to analyse and develop the usefulness of ultrasoun...

journal_title：Ultrasonics

authors： Cerrillo C,Jiménez A,Rufo M,Paniagua J,Pachón FT

更新日期：2014-01-01 00:00:00

abstract：:The results of experimental and theoretical studies of nonlinear acoustic phenomena (amplitude-dependent losses, resonant frequency shifts, damping of weak ultrasonic pulses and their carrier frequency phase delay under action of a powerful low-frequency pumping wave as well as amplitude-phase self-action of the finit...

journal_title：Ultrasonics

authors： Nazarov VE,Kolpakov AB

更新日期：2014-02-01 00:00:00

abstract：:The focus of contrast-enhanced ultrasound research has developed beyond visualizing the blood pool and its flow to new areas such as perfusion imaging, drug and gene therapy, and targeted imaging. In this work comparison between the application of polymer- and phospholipid-shelled ultrasound contrast agents (UCAs) for...

journal_title：Ultrasonics

authors： Grishenkov D,Kari L,Brodin LK,Brismar TB,Paradossi G

更新日期：2011-01-01 00:00:00

abstract：:Chemical mechanical polishing (CMP) is the primary method to realize the global planarization of silicon wafer. In order to improve this process, a novel method which combined megasonic vibration to assist chemical mechanical polishing (MA-CMP) is developed in this paper. A matching layer structure of polishing head w...

journal_title：Ultrasonics

authors： Zhai K,He Q,Li L,Ren Y

更新日期：2017-09-01 00:00:00

abstract：:In a recent report [F.G. Mitri, Z.E.A. Fellah, Ultrasonics 51 (2011) 719-724], it has been found that the instantaneous axial force (i.e. acting along the axis of wave propagation) of a Bessel acoustic beam centered on a sphere is only determined for the fundamental order (i.e. m=0) but vanishes when the beam is of vo...

journal_title：Ultrasonics

authors： Mitri FG,Fellah ZE

更新日期：2012-01-01 00:00:00

abstract：:Although ultrasonic energy is widely used cleaning and degreasing of parts and assemblies in automotive and other industries, the use of ultrasonic energy in an industrial scale for textile washing is very new. This is due to the complexity of controlling the combination of chemical and mechanical effects, whereas wit...

journal_title：Ultrasonics

authors： Merdan N,Akalin M,Kocak D,Usta I

更新日期：2004-04-01 00:00:00

abstract：:This paper deals with the influence of gas law on ultrasonic behaviour of porous media when the saturating fluid is high pressured. Previous works have demonstrated that ultrasonic transmission through a porous sample with variations of the static pressure (up to 18 bars) of the saturating fluid allows the characteriz...

journal_title：Ultrasonics

authors： Griffiths S,Ayrault C

更新日期：2010-06-01 00:00:00

abstract：:Thrombosis is an extremely critical clinical condition where a clot forms inside a blood vessel which blocks the blood flow through the cardiovascular system. Previous sonothrombolysis methods using ultrasound and microbubbles (MBs) often have a relatively low lysis rate due to the low microbubbles concentration at cl...

journal_title：Ultrasonics

authors： Zhang B,Kim H,Wu H,Gao Y,Jiang X

更新日期：2019-09-01 00:00:00

abstract：:A reformulation of the Thomson-Haskell method is presented for calculating the reflection coefficients of multilayer structure immersing in the coupling fluid. Instead of directly multiplying the layer propagator matrix, the new method splits the layer propagator matrix and excursively determines the interface stiffne...

journal_title：Ultrasonics

authors： Chen J,Bai X,Yang K,Ju BF

更新日期：2012-12-01 00:00:00

abstract：:The present analysis extends the previous work on the axial acoustic scattering of a high-order Bessel trigonometric beam (HOBTB) from a fluid sphere [F.G. Mitri, J. Appl. Phys. 109 (2011) 014916] to the generalized case of arbitrary scattering from a fluid sphere placed off-axially. The scattered pressure is expresse...

journal_title：Ultrasonics

authors： Mitri FG

更新日期：2013-07-01 00:00:00

abstract：:The mechanical pre-stress applied in piezotransducers used to generate high power ultrasound is needed to avoid ceramics fracture on traction cycle. Pre-stress levels inferior to 50 MPa can yield resonance shifting due to effectiveness of acoustic coupling between transducer pieces. Symmetrical transducers with differ...

journal_title：Ultrasonics

authors： Arnold FJ,Mühlen SS

更新日期：2003-05-01 00:00:00

abstract：:In the present work a general model of the vibrational behavior of the axle of a piezoelectric motor is proposed. In this motor, a cylinder-shaped permanent magnet, which act as a rotor, is pressed in contact with an end of a steel axle by means of the magnetic forces. The other end of the axle is fitted at the center...

journal_title：Ultrasonics

authors： Iula A,Pappalardo M

更新日期：2004-04-01 00:00:00

abstract：:Molecular techniques are transforming our understanding of cellular function and disease. However, accurate molecular analysis methods will be limited if the input DNA, RNA, or protein is not derived from pure population of cells or is contaminated by the wrong cells. A novel Ultrasonic Vibration Micro-dissection (UVM...

journal_title：Ultrasonics

authors： Sun L,Wang H,Chen L,Liu Y

更新日期：2006-12-22 00:00:00

abstract：:Many sparse signal representation (SSR) algorithms have been developed in the past decade. The advantages of SSR such as compact representations and super resolution lead to the state of the art performance of SSR for processing ultrasonic non-destructive evaluation (NDE) signals. Choosing a suitable SSR algorithm and...

journal_title：Ultrasonics

authors： Zhang GM,Zhang CZ,Harvey DM

更新日期：2012-03-01 00:00:00

abstract：:Several aspects of spectral analysis of bubble transients in Doppler ultrasonic decompression data are discussed. The computation of energy density spectra, using fast Fourier transform techniques for analyzing bubble transients, is described. Spectral analysis of data from probes implanted within animals, using a con...

journal_title：Ultrasonics

authors： Kisman K

更新日期：1977-05-01 00:00:00

abstract：:In this paper, te edge mode variation is studied with three different methods: the reciprocal work method, already used by Torvik [J. Acoust. Soc. Am. 41 (1967) 346] to model this phenomenon, the S-parameter method and a finite element model that are applied for the first time to the study of the edge resonance. Moreo...

journal_title：Ultrasonics

authors： Le Clezio E,Predoi MV,Castaings M,Hosten B,Rousseau M

更新日期：2003-01-01 00:00:00

abstract：:To improve the integrated performance of a representative bimodal linear ultrasonic motor under continuous operation, this paper proposes a novel dual-frequency asymmetric excitation method for such motors which can operate under traditional single-phase asymmetric or two-phase symmetric excitation modes. In particula...

journal_title：Ultrasonics

authors： Li X,Huang Y,Zhou L

更新日期：2020-12-01 00:00:00

abstract：:Intraluminal (within the alimentary tract) thermal surgery has been shown to be a useful therapeutic option when extracorporeal focused ultrasound applicators cannot be used since their beam may not reach the target site. If plane transducers are used for the treatment of alimentary tract tumours, the applicator must ...

journal_title：Ultrasonics

authors： Melodelima D,Prat F,Birer A,Theillère Y,Cathignol D

更新日期：2004-04-01 00:00:00

abstract：:We report on the 3-D modelling of periodic arrays of capacitive micromachined ultrasonic transducers (cMUTs) operating in fluid. Specific developments have been performed to model biperiodic transducer arrays and to take into account radiation into any stratified media at the front-side as well as the back-side of the...

journal_title：Ultrasonics

authors： Wilm M,Reinhardt A,Laude V,Armati R,Daniau W,Ballandras S

更新日期：2005-05-01 00:00:00

abstract：:Accurate computation of dispersion characteristics of guided waves in rails is important during the development of inspection and monitoring systems. Wavenumber versus frequency curves computed by the semi-analytical finite element method exhibit mode repulsion and mode crossing which can be difficult to distinguish. ...

journal_title：Ultrasonics

authors： Loveday PW,Long CS,Ramatlo DA

更新日期：2018-03-01 00:00:00