Abstract：
:Local Defect Resonance (LDR) is exploited for non-destructive testing (NDT) by using ultrasonic vibrations to get a localized resonant activation of defected zones. The LDR technique relies on the local stiffness difference between the defect and the sound material. Analyzing the structure's displacement field at this localized resonance frequency reveals the defect's location and provides information about the defect's characteristics, i.e. geometry, size and depth. In this study, the opportunities and limitations of linear LDR for NDT of materials are investigated in a parametric way. Both finite element simulations and experiments (using scanning laser Doppler vibrometry) are performed for aluminum alloy and carbon fiber reinforced polymer coupons with flat bottom holes and delaminations ranging in both depth and diameter. The resonance frequencies as well as the associated defect-to-background ratios are parametrically evaluated. For shallow defects, a clear LDR is observed caused by the strong local stiffness reduction at the defect. On the contrary, deep defects are associated with a limited stiffness decrease that results in the absence of LDR behavior. The local stiffness reduction at damages is further exploited using a weighted band power calculation. It is shown that using this technique, deep defects can be detected for which no LDR behavior was observed.
journal_name
Ultrasonicsjournal_title
Ultrasonicsauthors
Segers J,Hedayatrasa S,Poelman G,Van Paepegem W,Kersemans Mdoi
10.1016/j.ultras.2020.106130subject
Has Abstractpub_date
2020-07-01 00:00:00pages
106130eissn
0041-624Xissn
1874-9968pii
S0041-624X(20)30069-Xjournal_volume
105pub_type
杂志文章相关文献
ULTRASONICS文献大全abstract：:Very little is known about the myometrium's physiology in terms of its elasticity but shear wave elastography could be an efficient tool to better understand it. This could considerably help the prevention of difficult births, the consequences of which are tremendous for neonate morbidity and pathologies. The purpose ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2014.07.013
更新日期：2015-02-01 00:00:00
abstract：:The digital ultrasonic fixed path interferometer designed for testing small amounts of sample was used for the investigation of whole blood coagulation, retraction and clot melting processes. The ultrasound velocity and absorption are determined from the characteristics of an acoustic resonator consisting of an emitte...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/0041-624x(78)90007-0
更新日期：1978-01-01 00:00:00
abstract：:Elasticity assessment based on bulk wave velocity (BWV) measurements is the most popular technique to characterize the anisotropic stiffness tensor in cortical bone. Typically, a cuboid bone specimen is cut with its sides along the different anatomical directions. Then, the velocity of shear and longitudinal waves pro...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2017.05.009
更新日期：2017-09-01 00:00:00
abstract：:Exposure of Petunia hybrida cell suspensions to ultrasound at a frequency of 2.43 MHz in a standing wave field at an energy density of 70 Jm-3 (pressure amplitude of 0.78 MPa) decreased their mean viability to 35% after 20 min of sonication. A comparison of propagating wave and standing wave treatments at equal freque...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/s0041-624x(99)00166-3
更新日期：2000-03-01 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
pub_type： 杂志文章
doi：10.1016/j.ultras.2017.10.008
更新日期：2018-03-01 00:00:00
abstract：:Development of acoustic source localization techniques in anisotropic plates has gained attention in the recent past and still has scope of improvement. Most of such techniques existing in the literature either require known material properties or assume a straight line propagation of wave energy from the acoustic sou...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2019.105977
更新日期：2020-01-01 00:00:00
abstract：:A noble method for continuous leakage source location with one sensor in gas-filled pipe and noisy environment is proposed based on wavelet analysis and modal location theory. The leakage signals were analyzed into high and low frequencies by wavelet decomposition and noises and reflected waves were omitted. Then the ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2015.06.004
更新日期：2015-09-01 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：:The present study investigated the accuracy of micro-scale finite element modeling for simulating broadband ultrasound propagation in water-saturated trabecular bone-mimicking phantoms. To this end, five commercially manufactured aluminum foam samples as trabecular bone-mimicking phantoms were utilized for ultrasonic ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2016.01.014
更新日期：2016-05-01 00:00:00
abstract：:This study considers the acoustic streaming in water produced by a lithotripsy pulse. Particle image velocimetry (PIV) method was employed to visualize the acoustic streaming produced by an electromagnetic shock wave generator using video images of the light scattering particles suspended in water. Visualized streamin...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2005.09.004
更新日期：2006-02-01 00:00:00
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
pub_type： 杂志文章
doi：10.1016/j.ultras.2018.02.011
更新日期：2018-07-01 00:00:00
abstract：:The attenuation of ultrasound in homogenates of bovine skeletal muscle and suspensions of myofibrils was measured over the frequency range 1.5-7 MHz, and found to be proportional to protein concentration in both. In the homogenates it varied with frequency and temperature in a similar way to the attenuation in post ri...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/0041-624x(88)90071-6
更新日期：1988-07-01 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：:In general, the design and analysis of ultrasonic motor and motor's control strategy are based on mathematical model. The academic model is widely used in the analysis of traveling wave ultrasonic motor (TWUSM). But the dispersive characteristic of piezoelectric ceramics and other complicated process, such as the fric...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2013.09.012
更新日期：2014-02-01 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：:The results of computer simulation taking into account the linear and nonlinear material constants have been presented. Study of the influence of external uniaxial mechanical stress on the dispersive characteristics of elastic waves in piezoelectric structures as "La3Ga5SiO14/fused silica" has been executed. The compa...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2014.07.007
更新日期：2015-01-01 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
pub_type： 杂志文章
doi：10.1016/j.ultras.2013.06.006
更新日期：2014-01-01 00:00:00
abstract：:Ultrasonic flaw classification in weldment is an active area of research and many artificial intelligence approaches have been applied to automate this process. However, in the industrial applications, the ultrasonic flaw signals are not noise free and automatic intelligent defect classification algorithms show relati...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2018.12.001
更新日期：2019-04-01 00:00:00
abstract：:Essential to (cardiac) 3D ultrasound are 2D matrix array transducer technology and the associated (two-stage) beam forming. Given the large number of degrees of freedom and the complexity of this problem, simulation tools play an important role. Hereto, the impulse response (IR) method is commonly used. Unfortunately,...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2013.12.014
更新日期：2014-04-01 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：:Ultrasonic reflection and transmission measurements on saturated, plane-parallel, poroelastic slabs are presented. A data processing technique is proposed to obtain poroelastic parameters from transmission measurements. A special experimental data acquisition and processing technique is applied to minimize the finite ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2008.10.006
更新日期：2009-03-01 00:00:00
abstract：:This article proposes to estimate slow blood flow with high frequency ultrasound imaging. The proposed technique combines 2 methods. First, a statistical method, called Speckle Flow Imaging (SFI) based on the analysis of changes in the speckle pattern along time, gives an index directly related to the total velocity v...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2006.06.025
更新日期：2006-12-22 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
pub_type： 杂志文章
doi：10.1016/j.ultras.2019.06.004
更新日期：2019-09-01 00:00:00
abstract：:Our objective was to investigate whether hemorrhage control can be achieved faster when high-intensity focused ultrasound (HIFU) is applied in the presence of ultrasound contrast agents (UCA) as compared to HIFU only application. Incisions (3 cm long and 0.5 cm deep) were produced in the livers of anesthetized rabbits...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2006.07.018
更新日期：2006-12-01 00:00:00
abstract：:This paper presents a novel linear piezoelectric motor which is suitable for rapid ultra-precision positioning. The finite element analysis (FEA) was applied for optimal design and further analysis, then experiments were conducted to investigate its performance. By changing the input signal, the proposed motor was fou...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2016.07.010
更新日期：2016-12-01 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：:A split spectrum processing technique using a novel moving bandwidth minimization (MBM) method was developed to detect multiple specular targets having different spectral characteristics. Mathematical morphology (MM) algorithms were also implemented in order to compare the results. An experimental approach to optimal ...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/s0041-624x(99)00024-4
更新日期：1999-09-01 00:00:00
abstract：:It has been suggested that viscous losses, caused by the motion of myofibrils relative to their environmental fluid, could be the major cause of ultrasound attenuation in muscle. This Paper presents theoretical and experimental estimates of the viscous component of attenuation in suspensions of myofibrils. Experimenta...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/0041-624x(88)90046-7
更新日期：1988-01-01 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：:This paper presents a method which combines electromagnetic simulation and ultrasonic simulation to build EMAT array models. For a specific sensor configuration, Lorentz forces are calculated using the finite element method (FEM), which then can feed through to ultrasonic simulations. The propagation of ultrasound wav...
journal_title：Ultrasonics
pub_type： 杂志文章
doi：10.1016/j.ultras.2015.10.020
更新日期：2016-03-01 00:00:00
