Abstract:
:The paper deals with the study of the resonances of 1D periodic media composed of N elementary cells formed with two perfectly bonded layers which exhibit a high acoustic impedance contrast. In the case of a periodic bilayer structure constituted of a fluid layer and an elastic plate, it was shown in previous theoretical works that additional modes appear compared to those of a single plate. These are called structure modes. At low frequency, the so-called vertical modes are found. Approximate expressions of their cut-off frequencies are given and their numerical values match with the exact ones. At high frequency, the Lamb type modes are degenerated and modes in the fluid layers are also observed. Preliminary experimental results have already proved the existence of such phenomena for one and two periods. In our work, an experimental validation has been performed in the case of N periods made with a glass isotropic elastic plate and a water fluid layer, where the number N ranges from two to five. A good agreement is shown compared to theoretical works.
journal_name
Ultrasonicsjournal_title
Ultrasonicsauthors
Khaled A,Maréchal P,Lenoir O,Ech-Cherif El-Kettani M,Chenouni Ddoi
10.1016/j.ultras.2012.11.011subject
Has Abstractpub_date
2013-03-01 00:00:00pages
642-7issue
3eissn
0041-624Xissn
1874-9968pii
S0041-624X(12)00242-9journal_volume
53pub_type
杂志文章相关文献
ULTRASONICS文献大全abstract::In most applications of MEMS the mechanical properties of the used materials are key parameters for the perfect working of the microsystems. Measuring bulk acoustic waves excited in MEMS structures with ultra-short laser pulses is a powerful method for the accurate and non-destructive evaluation as well as for the cha...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2004.01.049
更新日期:2004-04-01 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
pub_type: 杂志文章
doi:10.1016/j.ultras.2010.05.006
更新日期:2011-01-01 00:00:00
abstract::The dispersion and attenuation features of the multi-physical fields coupled waves propagating in an infinite piezoelectric semiconductor and the reflection problem at a boundary which is mechanically free, electrically insulation and the dielectrically open circuit are studied in this paper. Different from the classi...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2018.09.009
更新日期:2019-02-01 00:00:00
abstract::An improved method for ultrasonic location of multiple flaws using perpendicular ultrasonic arrays, working in near-field conditions, is presented. The method uses the pulse-echo technique and is based on the processing of the information acquired by both the elemental emitting transducers and their adjacent ones. Thi...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2006.05.107
更新日期:2006-12-22 00:00:00
abstract::Today, sophisticated instruments and algorithms used for process control allow the efficient production of substances with the quality guaranteed to the customer. However, production and management techniques are changing. This article aims to analyze trends resulting from those changes from the point of view of ultra...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2006.05.047
更新日期:2006-12-22 00:00:00
abstract::Reflections of 4 MHz ultrasound pulses from 60 sites on 15 human aorta specimens were analysed using the plane-wave Born approximation (PWBA) inverse scattering method. The recovered high-resolution acoustic impedance profile for each site was correlated with an analysis (by microscope) of sections taken from that sit...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/0041-624x(95)00025-x
更新日期:1995-07-01 00:00:00
abstract::In practical cardiology, a stethoscope based auscultation has been used to reveal the patient's clinical status. Recently, several hand-held echo devices are going on market and they are expected to play a role as "visible" auscultation instead of stethoscope. We have developed a portable and inexpensive echo device w...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2003.11.009
更新日期:2004-04-01 00:00:00
abstract::The frequency dependence of H2O2 generation from H2O by a sonochemical reaction was detected experimentally. The results are in good agreement with previous experimental results, which indicate that in sonochemical reactions, frequencies higher than 90 kHz are more effective than frequencies of several tens of kiloher...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/s0041-624x(99)00114-6
更新日期:2000-03-01 00:00:00
abstract::It has been established that structural changes in a ferrofluid (formation of clusters) upon the effect of an external magnetic field can be effectively studied by ultrasound spectroscopy. In particular, the resonance absorption of ultrasonic waves enables detection and determination of the size of spherical clusters....
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/s0041-624x(02)00117-8
更新日期:2002-05-01 00:00:00
abstract::The Arg-Gly-Asp (RGD) peptide sequence was conjugated to poly (lactid acid), (PLA), microcapsules. These hollow, biodegradable PLGA microcapsules were developed in our laboratory for use as ultrasound contrast agents. By modifying the surface of the agent with a targeting ligand, it can be targeted to a specific addre...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2003.12.018
更新日期:2004-04-01 00:00:00
abstract::Aluminium sheet thickness has been calculated from ultrasonic data obtained using a send-receive, radially polarised electromagnetic acoustic transducer (EMAT). Sheets in the thickness range between 0.1 and 0.5 mm have been measured using this non-contact approach at a stand-off of up to 1.5 mm. Normal incidence shear...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/s0041-624x(01)00083-x
更新日期:2001-10-01 00:00:00
abstract::Features of an acoustic energy trapping and outflow in a High-overtone Bulk Acoustic Resonator (HBAR) were considered. On the example of a specified resonator based on a piezoelectric layered structure (PLS) as "Al/AlN/Mo/(100) diamond", the simulation of the propagation of microwave acoustic waves in the range of 10-...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2020.106311
更新日期:2021-03-01 00:00:00
abstract::Theoretical formulation for the problem of second harmonic guided waves in pipes is presented from the principles of continuum mechanics. The formulation is carried out in the reference configuration of the pipe with an emphasis on the correct use of the "Divergence" operator in the reference configuration. Second har...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2012.12.007
更新日期:2013-04-01 00:00:00
abstract::The local evaluation of several parameters of a crack is realized with a nonlinear laser ultrasonic method. The method is based on the sample excitation by two laser beams, independently intensity modulated at two cyclic frequencies ωH and ωL (ωH≫ωL) and on the detection of nonlinear frequency-mixing ultrasonic compon...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2016.04.005
更新日期:2016-07-01 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
pub_type: 杂志文章
doi:10.1016/j.ultras.2014.01.015
更新日期:2014-07-01 00:00:00
abstract::It is now accepted that an effective way to investigate the elastic properties of soft tissues is to generate a localized transient acoustic radiation force and to follow the associated displacements in the time/space domain. Shear waves induced by this stress field are particularly interesting in this kind of medium ...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2006.06.022
更新日期:2006-12-22 00:00:00
abstract::The objective of this study was to examine the potential of ultrasonic velocity as a rapid and nondestructive method to predict the dimensional stability of oak (Quercus petraea (Mattuschka) Lieblein) and chestnut (Castanea sativa Mill.) that are commonly used in flooring industry. Ultrasonic velocity, specific gravit...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2015.11.007
更新日期:2016-03-01 00:00:00
abstract::Effective receive beamforming in medical ultrasound imaging is important for enhancing spatial and contrast resolution. In current ultrasound receive beamforming, a constant sound speed (e.g., 1540m/s) is assumed. However, the variations of sound speed in soft tissues could introduce phase distortions, leading to degr...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2011.03.007
更新日期:2011-10-01 00:00:00
abstract::In ultrasonic non-destructive testing of materials with a coarse-grained structure the scattering from the grains causes backscattering noise, which masks flaw echoes in the measured signal. Several filtering methods have been proposed for improving the signal-to-noise ratio. In this paper we present a comparative stu...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2009.05.010
更新日期:2009-12-01 00:00:00
abstract::This paper describes a completely non-contact ultrasonic method of gas flow metering using air-coupled leaky Lamb waves. To show proof of principle, a simplified representation of gas flow in a duct, comprising two separated thin isotropic plates with a gas flowing between them, has been modelled and investigated expe...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2018.04.008
更新日期:2018-09-01 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
pub_type: 杂志文章
doi:10.1016/s0041-624x(02)00391-8
更新日期:2003-01-01 00:00:00
abstract::This paper describes fabrication and comparison of PMN-PT single crystal, PZT, and PZT-based 1-3 composite ultrasonic transducers for NDE applications. As a front matching layer between test material (Austenite stainless steel, SUS316) and piezoelectric materials, alumina ceramics was selected. The appropriate acousti...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2010.04.001
更新日期:2010-08-01 00:00:00
abstract::A novel nanocomposite-inspired in-situ broadband ultrasonic sensor previously developed, with carbon black as the nanofiller and polyvinylidene fluoride as the matrix, was networked for acousto-ultrasonic wave-based passive and active structural health monitoring (SHM). Being lightweight and small, this kind of sensor...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2017.03.007
更新日期:2017-07-01 00:00:00
abstract::Ultrasonics is an important diagnostic tool for bone diseases, as it allows for non-invasive assessment of bone tissue quality through mass density-elasticity relationships. The latter are, however, quite complex for fluid-filled porous media, which motivates us to develop a rigorous multiscale poromicrodynamics appro...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2013.12.005
更新日期:2014-07-01 00:00:00
abstract::The motivation for this research stems from a need for providing a non-destructive testing method capable of detecting and locating any defects and microstructural variations within armour ceramic components before issuing them to the soldiers who rely on them for their survival. The development of an automated ultras...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2015.05.027
更新日期:2015-09-01 00:00:00
abstract::In the food industry, ultrasonic cutting is used to improve separation by a reduction of the cutting force. This reduction can be attributed to the modification of tool-workpiece interactions at the cutting edge and along the tool flanks because of the superposition of the cutting movement with ultrasonic vibration of...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2009.03.001
更新日期:2009-06-01 00:00:00
abstract::Machining temperature is a key factor in ultrasonic vibration-assisted milling as it can significantly influence tool wear rate and residual thermal stresses. In current study, a physics-based analytical predictive model on machining temperature in ultrasonic vibration-assisted milling is proposed, without resorting t...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2020.106212
更新日期:2020-12-01 00:00:00
abstract::Electromagnetic-acoustic transducers (EMATs) consist of a magnet and a coil. They are advantageous in some non-destructive evaluation (NDE) applications because no direct contact with the specimen is needed to send and receive ultrasonic waves. However, EMATs commonly require excitation peak powers greater than 1kW an...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2017.02.009
更新日期:2017-07-01 00:00:00
abstract::A nonlinear acoustic method to assess the damage level of a complex medium is discussed herein. Thanks to the highly nonlinear elastic signatures of cracks or, more generally, internal solid contacts, this method is able to distinguish between contributions from linear wave scattering by a heterogeneity and contributi...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/j.ultras.2016.09.015
更新日期:2017-01-01 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
pub_type: 杂志文章
doi:10.1016/j.ultras.2016.11.024
更新日期:2017-03-01 00:00:00