Abstract:
:The characterization of stress states in materials is often necessary in some industrial application. The ultrasonic methods can be potentially convenient since stress states inside materials can be obtained even if materials are opaque. Nevertheless, the knowledge of acousto-elastic coefficients is generally necessary to estimate residual stresses by ultrasonic methods, but the experimental determination of these acousto-elastic coefficients can be difficult in some cases. In this paper, Rayleigh wave (RW) acousto-elastic coefficients of an orthotropic material are theoretically determined according to its characteristics, i.e. the density and the secondand third-order elastic constants. Then, these RW acousto-elastic coefficients are directly measured during an experimental stage and a comparison between calculated and measured coefficients is realized. This study allows on the one hand to check the theoretical development and on the other hand to show that it is possible to calculate acousto-elastic coefficients theoretically from intrinsic characteristics of the material rather than measuring them directly during a calibration phase which is sometimes long and difficult to realize.
journal_name
Ultrasonicsjournal_title
Ultrasonicsauthors
Duquennoy M,Ouaftouh M,Ourak M,Jenot Fdoi
10.1016/s0041-624x(02)00262-7subject
Has Abstractpub_date
2002-06-01 00:00:00pages
575-83issue
8eissn
0041-624Xissn
1874-9968pii
S0041-624X(02)00262-7journal_volume
39pub_type
杂志文章相关文献
文献大全abstract::The problem of normal propagation modes of a plate submerged in a fluid is usually treated by considering continuous leaky Lamb waves or by considering transient waves. Angular plate resonances are associated with modes obtained by the first approach, whereas frequency plate resonances are associated with modes obtain...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/s0041-624x(99)00008-6
更新日期:1999-06-01 00:00:00
abstract::For untold millennia certain animals have used ultrasound to probe places where light is unavailable, echo-locating bats being among the most adept. With ultrasonics, bats can quickly and safely 'see' at night in pursuing insects or flying in dark caves. Unable to hear ultrasound, humans have nevertheless made use of ...
journal_title:Ultrasonics
pub_type: 历史文章,杂志文章
doi:10.1016/s0041-624x(99)00063-3
更新日期:2000-03-01 00:00:00
abstract::We have developed an ultrasonic micro-motor for use as a micro-actuator in place of an electromagnetic motor. This ultrasonic micro-motor, which can be driven by a single signal and in which the change of the direction of the rotor movement can be made easily by selecting the electrode to apply the driving signal, can...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/s0041-624x(99)00192-4
更新日期:2000-03-01 00:00:00
abstract::Quantifiable measures of vascularity obtained from contrast enhanced color flow images were correlated with pathologic vascularity measurements in ten female patients with a solid breast mass. Each patient received Levovist Injection (Berlex Laboratories Inc., Montville, NJ). Color flow images pre- and post-contrast w...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/s0041-624x(99)00146-8
更新日期:2000-03-01 00:00:00
abstract::A comparative study is carried out between the nonlinear behavior of a composite and the piezoceramic used to obtain it. This characterization is necessary for using the composite in power transducer applications. A study of the losses and the resonator stiffness variations has also been done. Both these effects, as w...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/s0041-624x(99)00179-1
更新日期:2000-03-01 00:00:00
abstract::This paper presents an ultrasonic method for measuring the density of liquids with a solid layer separating a reference fluid and a test fluid. By adjusting the frequency of the exciting signal according to the thickness of the layer, it is possible to generate destructive interference of the waves reflected at the fi...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/s0041-624x(99)00050-5
更新日期:2000-03-01 00:00:00
abstract::Our objective consists in validating a new set-up which will permit us to carry out simultaneously ultrasonic and X-ray diffraction measurements under pressure. To validate the results obtained by this new set-up, the elastic properties of a single crystal of germanium were studied. Our results are in good agreement w...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/s0041-624x(99)00104-3
更新日期:2000-03-01 00:00:00
abstract::We present a harmonic generation method based on a pitch-catch experimental setup and the calculation of the corresponding nonlinear parameter in 1-alkanols, from methanol to 1-decanol. By focusing a 14 MHz ultrasonic toneburst through a spherical quartz lens in these alcohols, a second harmonic is produced and measur...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/s0041-624x(99)00160-2
更新日期:2000-03-01 00:00:00
abstract::Ultrasound has been used intensively for the last 15 years for studying the hemodynamics of the human body. Systems for determining both the velocity distribution at one point of interest (spectral systems) and for displaying a map of velocity in real time have been constructed. A number of schemes have been developed...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/s0041-624x(99)00127-4
更新日期:2000-03-01 00:00:00
abstract::Like velocity, strain induces a time delay and a time scaling to the received signal. Elastography typically uses time delay techniques to indirectly (i.e. via the displacement estimate) measure tissue strain induced by an applied compression, and considers time scaling as a source of distortion. More recently, we hav...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/s0041-624x(99)00116-x
更新日期:2000-03-01 00:00:00
abstract::It is demonstrated that acoustic attenuation does not influence the rise time of transient laser-induced displacement of a surface. ...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/s0041-624x(99)00048-7
更新日期:2000-03-01 00:00:00
abstract::As part of the research work on Smart Materials and Structures, the development of self-monitoring materials is an emerging issue. In the case of plate-shaped structures, Lamb waves can be used for their relevant properties: long-range propagation, sensitivity to internal flaws and whole-thickness interrogation. This ...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/s0041-624x(99)00138-9
更新日期:2000-03-01 00:00:00
abstract::A recently developed optical heterodyne interferometer is proved to be sensitive to detect ultrasonic waves leaking out from metals (and from non-metals as well) several centimeters away from the metal surface in air. This measurement is based on the detection of the optical index variation in air due to the leaky wav...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/s0041-624x(99)00133-x
更新日期:2000-03-01 00:00:00
abstract::We address the problem of locating a transient source, such as an acoustic emission source, in a plate. We apply time-frequency analysis to the signals detected at a receiver. These highly dispersive and complex waveforms are measured for source-receiver separations ranging from 40 to 180 plate thicknesses and at freq...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/s0041-624x(99)00206-1
更新日期:2000-03-01 00:00:00
abstract::This paper describes the design and testing of a flow-through ultrasonic separation device that allows the concentration of particles within a fluid. The device operates without the use of an acoustically transparent element. Three models are used to examine the behaviour of the cell, dealing with acoustic-particle in...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/s0041-624x(99)00134-1
更新日期:2000-03-01 00:00:00
abstract::Bioreactors are broadly applied in biotechnology and wastewater treatments. The so-called advanced bioreactor systems should be optimised in a more compact, more efficient and more effective form. One method of optimisation is the improvement of the solid-liquid interface of the sludge flocs and the mass transfer rate...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/s0041-624x(99)00132-8
更新日期:2000-03-01 00:00:00
abstract::The dispersion relation for a granular bed with a small amount of fine bubbles is formulated and analyzed. It is assumed that the grain size is much larger than the bubble's radius and that their volume concentration is small. The study is motivated by the problem of acoustic diagnostics of fixed bed chemical reactors...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/s0041-624x(99)00156-0
更新日期:2000-03-01 00:00:00
abstract::An analysis is done of the crossing of a forbidden region in a thin plate by a backward propagating Lamb wave: the refraction/reflection effects undergone by the coupled modes produced at each boundary of the forbidden region are taken into consideration, as well as the penetration of the backward wave as an evanescen...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/s0041-624x(99)00034-7
更新日期:2000-03-01 00:00:00
abstract::The use of ultrasonic sensors for process control is currently widespread for flow, level or distance measurements. Recently, interest has increased, too in the application of ultrasonic sensors to concentration measurements in complex liquids. In this application there are high demands for a defined and stable qualit...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/s0041-624x(99)00051-7
更新日期:2000-03-01 00:00:00
abstract::The Born inversion of time records of acoustic pulses reflected from a layer object gives rise to the images with ghost-like artifacts that make it difficult to pick out the exact thickness and composition of the object. The origin of these ghosts is explained herein and a means is proposed for their suppression. ...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/s0041-624x(99)00228-0
更新日期:2000-05-01 00:00:00
abstract::In the last few years, the efforts of many researchers have been focused on developing 3D real-time scanners. The use of 2D phased-array transducers makes it possible to steer the ultrasonic beam in all directions in the scanned volume. An unacceptably large amount of transducer channels (more than 4,000) must be used...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/s0041-624x(00)00013-5
更新日期:2000-07-01 00:00:00
abstract::New clinical concepts in lithotripsy demand small shock heads. Reducing the size of piezoelectric shock heads will only be possible if the pressure generated at the surface of each transducer can be increased so that the total pressure at the focus remains very high. We propose for the first time to increase the press...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/s0041-624x(00)00023-8
更新日期:2000-11-01 00:00:00
abstract::Composed piezotransducers submitted to mechanical pre-stressing present shifts on resonance and anti-resonance frequencies. Changes on characteristic parameters of the ceramic and in the coupling between the parts of the transducer can be the causes for this behavior. In applications where the level of pre-stressing i...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/s0041-624x(00)00048-2
更新日期:2001-01-01 00:00:00
abstract::In this paper, an improved method for the measurement of acoustic power and electro-acoustic efficiency of high power ultrasonic transducers is presented. The measuring principle is described, the experimental results are given. In comparison with traditional methods, the method presented in this paper has the advanta...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/s0041-624x(99)00076-1
更新日期:2000-01-01 00:00:00
abstract::Phase distortion due to reflection in transcranial ultrasound propagation is investigated. Understanding of these phase-dependent properties is motivated by efforts to construct a reliable prediction model for noninvasive ultrasound therapy in the brain. The present study measures the phase of an ultrasound wave after...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/s0041-624x(00)00052-4
更新日期:2001-03-01 00:00:00
abstract::This paper reports on an ultrasonic measurement system and its application for in situ real-time measurement of very fast regression rates (>200 mm/s) of the melting interface (RRMI) produced when burning particular metals such as aluminium at high pressures. The RRMI is referred to as the rate at which a solid/liquid...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/s0041-624x(00)00067-6
更新日期:2001-04-01 00:00:00
abstract::In recent years Lamb waves are being used for internal defect detection in multilayered composite plates. Different Lamb modes generate various stress levels in different layers. As a result, all Lamb modes are not equally sensitive to internal defects of various layers. A number of studies have been carried out to id...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/s0041-624x(01)00052-x
更新日期:2001-06-01 00:00:00
abstract::The propagation and scattering of ultrasound in concrete is discussed. The heterogeneous composition of concrete causes the ultrasound to scatter considerably. In the limit of many scattering events, the ultrasonic energy density in circular cylinders of concrete is shown to evolve in accordance with a one-dimensional...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/s0041-624x(01)00077-4
更新日期:2001-10-01 00:00:00
abstract::Conventional 2D arrays have a set of squared elements whose inter-element spacing is around lambda/2. This arrangement requires an excessive amount of electronic resources for the generation and processing of ultrasonic signals. In this work, the beam properties of a single divided-ring array are analysed theoreticall...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/s0041-624x(02)00100-2
更新日期:2002-05-01 00:00:00
abstract::The development and optimization of non-destructive testing procedures usually needs experimental data. As experiments are time-consuming and expensive to conduct, we would like to use numerical data instead. This is admissible, if the simulation describes the physical experiments accurately. A three-dimensional displ...
journal_title:Ultrasonics
pub_type: 杂志文章
doi:10.1016/s0041-624x(02)00134-8
更新日期:2002-05-01 00:00:00