Abstract：
:Steel-concrete modular construction is increasingly used in nuclear structure construction. Conventional nondestructive testing methods are not able to detect internal concrete defects because the thick concrete wall is covered by steel plates. An ultrasonic guided method is proposed to detect honeycombs and voids around cross tie bars by using the tie bar as the waveguide. Guided wave dispersion curves are analyzed for the two-layer system (tie bar embedded in concrete). The high order longitudinal mode L(0,8) is selected as the working mode due to its lowest attenuation. Ultrasonic attenuations were measured on naked bars and bars embedded in concrete. Material damping coefficients of the steel bar were calibrated on the naked bar. Three tie bars with different bonding conditions in concrete (solid, with honeycomb and void) were tested at early age, 7 days and 110 days. The experimental results demonstrate that ultrasonic guided wave attenuation can be used to identify internal defect and evaluate the tie bar/concrete bonding condition at both early and late ages.
journal_name
Ultrasonicsjournal_title
Ultrasonicsauthors
Sun H,Zhu Jdoi
10.1016/j.ultras.2020.106096subject
Has Abstractpub_date
2020-04-01 00:00:00pages
106096eissn
0041-624Xissn
1874-9968pii
S0041-624X(20)30035-4journal_volume
103pub_type
杂志文章相关文献
ULTRASONICS文献大全abstract：:Focused ultrasound holds promise in a large number of therapeutic applications. It has long been known that high intensity focused ultrasound can kill tissue through coagulative necrosis. However, it is only in recent years that practical clinical applications are becoming possible, with the development of high power ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2004.04.003
更新日期：2004-08-01 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
pub_type： 杂志文章
doi：10.1016/j.ultras.2014.02.020
更新日期：2014-09-01 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：:The present investigation concerns the propagation of surface waves at the vacuum-solid interface of a solid which is isotropic and thermoviscoelastic, i.e., for which the effects of heat conductivity need to be taken into account. Calculations show that, in addition to the Rayleigh wave, a thermal surface wave propag...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/s0041-624x(00)00017-2
更新日期：2000-07-01 00:00:00
abstract：:This paper investigates the dependence of ultrasonic velocity in rabbit liver on the water content and tissue structure. The results obtained indicate that the composition and water content of the liver tissue but not its structure determine the value of velocity. ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/0041-624x(87)90040-0
更新日期：1987-07-01 00:00:00
abstract：:Guided modes propagation in intact, fractured and healing long bone has drawn significant research interests. However, mode quantifications for the direct comparison are still necessary to address. The aim of the study is to analyze the mode interaction with a notch-fracture in the long bone and find quantitative ultr...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2013.09.015
更新日期：2014-07-01 00:00:00
abstract：:As known, anomalous resisto-acoustic effect is a fundamental property for weakly inhomogeneous piezoactive waves (Bleustein-Gulyaev, Love, and some leaky waves). It consists in that the velocity of aforementioned waves first increases, achieves its maximum, and only then decreases with increasing conductance of a laye...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2015.01.007
更新日期：2015-05-01 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：:This paper deals with the analysis of the guided evanescent waves in stopbands of a 1D phononic crystal (PC). A new numerical implementation is shown in order to get the complex values of the wavenumbers in a frequency range where a gap occurs. The considered phononic system is an aluminum plate with a one-dimensional...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2012.09.009
更新日期：2013-02-01 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：:This paper reports the development of a two-dimensional thick film lead zirconate titanate (PZT) ultrasonic transducer array, operating at frequency approximately 7.5MHz, to demonstrate the potential of this fabrication technique for microparticle manipulation. All layers of the array are screen-printed then sintered ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2015.05.010
更新日期：2015-09-01 00:00:00
abstract：:A numerical study is presented to show the potential for using vibroacoustic-based experiments to identify elastic material properties of orthotropic cylindrical vessels immersed in fluids. Sensitivity analyses and a simulated inverse problem are shown to quantify the potential for material characterization through th...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2008.07.004
更新日期：2008-11-01 00:00:00
abstract：:The Synthetic Aperture Focusing (SAF) technique makes it possible to achieve a higher and more uniform quality of ultrasound images throughout depth, as if both transmit and receive dynamic focusing were applied. In this work we combine a particular implementation of SAF, called Synthetic Transmit Aperture (STA) techn...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2016.11.022
更新日期：2017-03-01 00:00:00
abstract：:Experimentally observed dissipated nonlinearity in Lamb wave propagation in composites due to stress-relaxation is reported herein. It was found that the stress relaxation in composite is inherently coupled with the second order nonlinear parameter derived from the Lamb wave modes. Due to the combined effect of intern...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2019.01.002
更新日期：2019-07-01 00:00:00
abstract：:Surface wave motions generated by a time-harmonic point load applied at the surface of an isotropic linearly elastic half-space are conventionally solved by the use of integral transform techniques. The inverse transforms, are often complicated and will not always yield closed-form solutions. In this paper expressions...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2014.05.003
更新日期：2014-09-01 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：:In this paper a high intensity focused ultrasound (FUS) phantom model was developed, in order to be used in experiments for Blood Brain Barrier (BBB) disruption. The target was to create a phantom model that represents the disruption of the BBB during ultrasound application. An appropriate experimental setup was creat...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2020.106244
更新日期：2021-02-01 00:00:00
abstract：:Clinical ultrasound images are often perceived as difficult to interpret due to image blurring and speckle inherent in the ultrasound imaging. But the image quality can be improved by deconvolution using an estimate of the point-spread function. However, it is difficult to obtain a sufficiently accurate estimate of th...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2008.10.005
更新日期：2009-03-01 00:00:00
abstract：:The therapeutic benefits of several existing ultrasound-based therapies such as facilitated drug delivery, tumor ablation and thrombolysis derive largely from physical or mechanical effects. In contrast, ultrasound can also trigger various time-dependent biochemical responses in the exposed biological milieu. Several ...
journal_title：Ultrasonics
pub_type： 杂志文章,评审
doi：10.1016/j.ultras.2008.02.002
更新日期：2008-08-01 00:00:00
abstract：:Lactic acid, psychrophilic, and mesophilic bacteria, Escherichia coli, Salmonella spp. and Staphylococcus aureus were enumerated on chicken breasts after treatment with different high intensity ultrasound (frequency 40 kHz, intensity 9.6 W/cm-2) application times (0, 30, and 50 min) and packaging atmospheres (aerobic ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2018.01.001
更新日期：2020-03-01 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：: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：:A new method of spatial compound imaging is presented that improves image quality without the usual requirement to decrease the frame rate. The new method of imaging utilizes three transducers for data acquisition. The transducer located at the center of the transducer system is a phased array probe that acts as both ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/s0041-624x(03)00105-7
更新日期：2003-07-01 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
pub_type： 杂志文章
doi：10.1016/j.ultras.2010.07.007
更新日期：2011-02-01 00:00:00
abstract：:A localization approach of welded joint damage is proposed based on acoustic emission (AE) beamforming. In this method, a uniform line array is introduced to detect the AE signal of welded joints in specified area. In order to investigate the influence of fillet and crimping commonly existing in a welded plate structu...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2016.11.002
更新日期：2017-02-01 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
pub_type： 杂志文章
doi：10.1016/j.ultras.2009.12.003
更新日期：2010-05-01 00:00:00
abstract：:Ultrasonic standing wave chambers with acoustic pathlengths of 1.1 and 0.62 mm have been constructed. The chambers were driven at frequencies over the range 0.66-12.2 MHz. The behaviour of 2 microns diameter latex microparticles and 5 microns diameter yeast in the chambers has been elucidated. One (flow) chamber had a...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/s0041-624x(98)00019-5
更新日期：1998-08-01 00:00:00
abstract：:Over the last two decades, more efficient transducers were developed for the generation and reception of air-borne ultrasound, thus enabling the non-contact, non-contaminating inspection of composite laminates and honeycomb structures widely used in the aerospace industry. This paper presents the fundamentals of makin...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2006.05.091
更新日期：2006-12-22 00:00:00
abstract：:A practical optodynamic study was performed to determine the usability of different lengths of laser pulses for the generation of ultrasonic transients in a solid material. The aim of the study was to evaluate the possibility of a dual use for a laser pulse-for laser material processing, on the one hand, and for the u...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2006.05.071
更新日期：2006-12-22 00:00:00
abstract：:In this paper, the resonance frequency equation and expression of displacement amplitude magnifications of a full-wave barber ultrasonic horn are obtained. By discussing the relationships between the displacement amplitude magnifications and the geometrical dimensions, the optimized design of the horn for the largest ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2011.12.006
更新日期：2012-07-01 00:00:00
