Artículos de revistas: "Guided ultrasonic waves"

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Moilanen, Petro. "Ultrasonic guided waves in bone". Journal of the Acoustical Society of America 123, n.º 5 (mayo de 2008): 3631. http://dx.doi.org/10.1121/1.2934867.

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Moilanen, P. "Ultrasonic guided waves in bone". IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control 55, n.º 6 (junio de 2008): 1277–86. http://dx.doi.org/10.1109/tuffc.2008.790.

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3

Peng, Kunhong, Yi Zhang, Xian Xu, Jinsong Han y Yaozhi Luo. "Crack Detection of Threaded Steel Rods Based on Ultrasonic Guided Waves". Sensors 22, n.º 18 (12 de septiembre de 2022): 6885. http://dx.doi.org/10.3390/s22186885.

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Fatigue cracks are typical damage of threaded steel rods under dynamic loads. This paper presents a study on ultrasonic guided waves-based, fatigue-crack detection of threaded rods. A threaded rod with given sizes is theoretically simplified as a cylindrical rod. The propagation characteristics of ultrasonic guided waves in the cylindrical rod are investigated by semi-analytical finite element method and the longitudinal L(0, 1) modal ultrasonic guided waves in low frequency band is proposed for damage detection of the rod. Numerical simulation on the propagation of the proposed ultrasonic guided waves in the threaded rod without damage shows that the thread causes echoes of the ultrasonic guided waves. A numerical study on the propagation of the proposed ultrasonic guided waves in the threaded rod with a crack on the intersection of the smooth segment and the threaded segment shows that both linear indexes (Rf and ARS) and nonlinear indexes (βre′ and β′) are able to detect the crack. A constant-amplitude tensile fatigue experiment was conducted on a specimen of the threaded rod to generate fatigue cracks in the specimen. After every 20,000 loading cycles, the specimen was tested by the proposed ultrasonic guided waves and evaluated by the linear indexes and nonlinear indexes. Experimental results show that both the linear and nonlinear indexes of the ultrasonic guided waves are able to identify the crack before it enters the rapid growth stage and the nonlinear indexes detect the crack easier than the linear indexes.

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4

Banerjee, Sourav. "Quantum analogous spin states to explain topological phase for guided waves in ultrasonic nondestructive evaluation". Journal of the Acoustical Society of America 157, n.º 4 (1 de abril de 2025): 2477–97. https://doi.org/10.1121/10.0036345.

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Spin is a physically observable property that is instrumental for topological behaviors in quantum mechanics. Spin states dictate complex interactions of physical parameters in a topological media during wave propagation. Ultrasonic guided waves are elastic waves that propagate in materials and structures and may also have similar quantum analogous spin states leading to the topological behavior. Traditionally nondestructive evaluation and structural health monitoring use ultrasonic guided waves, but spin states and their topological contributions are not measured or analyzed for damage identification and localization. In this article, the elastic spin state that naturally manifests by the ultrasonic guided waves in an elastic wave guide is explained through quantum analogous derivation. Starting from the fundamentals of Noerther's conservation theorem total angular momentum of guided wave modes is derived. It is shown that even without geometric periodicity guided waves could still have the nonzero spin angular momentum (SAM) density, which may appear from 14 different unique interactions of guided wave potentials. Based on SAM densities spin–orbit interactions in a plate like wave guide is demonstrated where artificially through active actuation, anticlockwise and clockwise spins were created. Further spin states that eventually affect the topological phase is explained through a simulated experiment.

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5

Zhu, Xin Jie, Zan Dong Han, Dong Du, Yi Fang Chen y Ke Yi Yuan. "Imaging and Testing of Ultrasonic Sh Guided Waves in Plate with Lap Welding Structure". Advanced Materials Research 301-303 (julio de 2011): 603–9. http://dx.doi.org/10.4028/www.scientific.net/amr.301-303.603.

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The imaging and testing of ultrasonic SH (Shear Horizontal) guided waves may be used into testing and SHM (Structure Health Monitoring) of industrial plate with welding structure in service, which have much more important applied potential. During imaging and testing for steel plate with lap welding structure, photoelastic experiment on propagation of guided waves in Plexiglas plate was studied to clearly see the excellent advantages of SH guided waves. The mode of SH guided waves was analyzed to select the zero order mode SH0 and the SH guided waves transducer with SH0 mode was developed. Based on the synthetic aperture focusing method，a multichannel ultrasonic imaging and testing experimental system of ultrasonic SH guided waves was constructed，the imaging of plate with lap welding structure was mainly studied. The research results shows the ultrasonic SH guided waves and the transducers are fit for long distance testing for the plate with lap welding structure. The ultrasound scattering nearby the weld may cause a blind testing zone, about 150 mm wide, in which the less size corrosion defects at the blind zone could not be revealed in image, so as to lead to defects “no testing”. The imaging and testing of ultrasonic SH guided waves would be used for non-destructive testing of plate with lap welding structure, which image both can characterize the corrosion defects and lap welding structure, and realize the precise location of the weld. The proposed research provides important foundation for improving ultrasonic guided waves imaging and testing quality and SHM of industrial in-site plate with lap welding and larger size.

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6

Tanveer, Mohad, Muhammad Umar Elahi, Jaehyun Jung, Muhammad Muzammil Azad, Salman Khalid y Heung Soo Kim. "Recent Advancements in Guided Ultrasonic Waves for Structural Health Monitoring of Composite Structures". Applied Sciences 14, n.º 23 (28 de noviembre de 2024): 11091. http://dx.doi.org/10.3390/app142311091.

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Structural health monitoring (SHM) is essential for ensuring the safety and longevity of laminated composite structures. Their favorable strength-to-weight ratio renders them ideal for the automotive, marine, and aerospace industries. Among various non-destructive testing (NDT) methods, ultrasonic techniques have emerged as robust tools for detecting and characterizing internal flaws in composites, including delaminations, matrix cracks, and fiber breakages. This review concentrates on recent developments in ultrasonic NDT techniques for the SHM of laminated composite structures, with a special focus on guided wave methods. We delve into the fundamental principles of ultrasonic testing in composites and review cutting-edge techniques such as phased array ultrasonics, laser ultrasonics, and nonlinear ultrasonic methods. The review also discusses emerging trends in data analysis, particularly the integration of machine learning and artificial intelligence for enhanced defect detection and characterization through guided waves. This review outlines the current and anticipated trends in ultrasonic NDT for SHM in composites, aiming to aid researchers and practitioners in developing more effective monitoring strategies for laminated composite structures.

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7

Qi, Wei Qiang, Yan Ran Li, Xiao Xin Chen y Da Peng Duan. "Study of PD Ultrasonic Wave's Properties in Solid Medium". Advanced Materials Research 860-863 (diciembre de 2013): 2161–67. http://dx.doi.org/10.4028/www.scientific.net/amr.860-863.2161.

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Longitudinal ultrasonic wave signals, transverse ultrasonic wave signals and other ultrasonic body wave signals generated by partial discharge are analyzed emphatically in the acoustic emission method of partial discharge detection in high voltage equipment [1-. Velocity of longitudinal ultrasonic wave is often used to calculate partial discharge defects position in the location study of partial discharge. In practical applications errors are always large. And a recent study finds that a class of plate ultrasonic guided waves will be inspired when ultrasonic body waves are transmitted from the gaseous medium to the metal medium [9-1. As the attenuation coefficient is small and the transmission distance is large when the waves propagate along the metal plate, in the partial discharge detection, ultrasonic signals detected by the ultrasonic sensor attached to the equipment enclosure include ultrasonic guided waves besides the ultrasonic body waves.

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8

Michaels, Jennifer E., Sang Jun Lee, Anthony J. Croxford y Paul D. Wilcox. "Chirp excitation of ultrasonic guided waves". Ultrasonics 53, n.º 1 (enero de 2013): 265–70. http://dx.doi.org/10.1016/j.ultras.2012.06.010.

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9

Mendig, C., J. Riemenschneider, H. P. Monner, L. J. Vier, M. Endres y Hannah Sommerwerk. "Ice detection by ultrasonic guided waves". CEAS Aeronautical Journal 9, n.º 3 (9 de marzo de 2018): 405–15. http://dx.doi.org/10.1007/s13272-018-0289-0.

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10

Honarvar, F., E. Enjilela y A. N. Sinclair. "Guided ultrasonic waves in composite cylinders". Mechanics of Composite Materials 43, n.º 3 (mayo de 2007): 277–88. http://dx.doi.org/10.1007/s11029-007-0027-x.

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11

Zhu, Xinjie, Sen Yao, Mingxi Deng, Jie Zhang y Yan Gao. "The Multi-Frame Imaging Detection of Ultrasonic Guided Waves in Welded Structural Plates Based on Arc Sparse Array with Left Rank". Applied Sciences 14, n.º 19 (5 de octubre de 2024): 8981. http://dx.doi.org/10.3390/app14198981.

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The imaging detection of ultrasonic guided waves in plates using arc sparse arrays is highly significant for weld scattering conditions. A novel approach for detecting welded plate structures using the left rank of ultrasonic guided waves in arc sparse arrays was proposed. The relationship between the receiving matrix and the left rank was analyzed, along with the connection between the arc sparse array with the left rank and the receiving aperture. The imaging mechanism of the ultrasonic guided waves in arc sparse arrays with left rank under weld scattering conditions was investigated. The results of imaging experiments demonstrated a downward trend in the gray and background gray of the multi-frame images. As the left rank reaches approximately 64% of the full rank, the slope of the image gray and background gray decreases gradually, leading to the appearance of an inflection point. With an increasing signal-to-noise ratio curve, the imaging improved during the multi-frame imaging process of ultrasonic guided waves for the arc sparse arrays with left rank under weld scattering conditions. This research showed that the multi-frame imaging of ultrasonic guided waves in welded structural plates using arc sparse arrays with left rank effectively characterized scattering information with millimeter-scale wavelength size. The experimental results validated the feasibility of the theoretical analysis. This research provides a crucial foundation for the further exploration and application of the multi-frame imaging detection of ultrasonic guided waves using irregular arrays in welded structural plates.

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12

Yu, Shuisheng, Leilei Niu y Jin Chen. "Experimental and Numerical Studies on Bond Quality of Fully Grouted Rockbolt under Confining Pressure and Pull-Out Load". Shock and Vibration 2022 (25 de agosto de 2022): 1–12. http://dx.doi.org/10.1155/2022/7012510.

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In mining engineering, the in situ stress changes with the stress induced by the surrounding mining activities. It positively or negatively affects the propagation of ultrasonic guided waves in rockbolts. Therefore, the effect of in situ stress in rockbolt support was determined by applying confining pressure and pull-out load in a laboratory test and using ultrasonic guided waves to test the rockbolt. Furthermore, the propagation law of ultrasonic guided waves and bond quality of the rockbolt under the interaction of the pull-out load and confining pressure were studied. Numerical simulations were performed to deduce the guided wave propagation process in grouted systems, and the influencing mechanism of the pull-out load and confining pressure on the guided wave propagation was discussed. The laboratory test and numerical simulation results show that the confining pressure weakens the guided wave propagation without pull-out load. Under the same pull-out load, the guided wave propagation gradually strengthens with increasing confining pressure. A larger confining pressure weakens the weakening effect of the pull-out load and suppresses the discreteness of the guided wave propagation. Under the same confining pressure, the guided waves did not diffract well into the cement mortar and concrete with increasing pull-out load, the confining pressure restricted the radial vibration of the guided waves, and the guided wave propagation law weakened. Thus, the pull-out load plays a weakening role in the propagation law of ultrasonic guided waves.

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13

Zheng, Zhu Peng, Ying Lei, Xue Peng Cui y Song Yu. "Non-Destructive Test of the Steel Bar by Using Piezoceramics Sheets". Advanced Materials Research 718-720 (julio de 2013): 692–97. http://dx.doi.org/10.4028/www.scientific.net/amr.718-720.692.

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Piezoelectric ceramics sheets are used to excite and receive ultrasonic guided waves in a steel bar. The multi-modes and disperse characteristics of guided waves within that are investigated theoretically and experimentally. The results show that ultrasonic guided waves can be generated and received by piezoelectric ceramics sheets which can be used to measure the length of the steel bar and detect the defection in it.

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14

Na, Won-Bae y Tribikram Kundu. "Underwater Pipeline Inspection Using Guided Waves". Journal of Pressure Vessel Technology 124, n.º 2 (1 de mayo de 2002): 196–200. http://dx.doi.org/10.1115/1.1466456.

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Underwater pipeline inspections are conducted using ultrasonic cylindrical guided waves in the laboratory environment. Three different types of mechanical defects—gouge, removed metal, and dent—are fabricated in small-diameter, 22.22-mm, aluminum pipes and tested. To efficiently propagate the antisymmetric (flexural) cylindrical guided waves through the aluminum pipe in water, a new transducer holder device is designed. The device uses commercially available ultrasonic transducers that generate compressional ultrasonic waves in the water. The device can change the striking angle of the incident beam from 0 to 51 deg. With the help of this device, the incident angle adjustment and frequency sweeping can be carried out. This is necessary for obtaining the time history of the received signals for various incident angles and signal frequencies; then these time histories are converted to Vf curves, or received signal amplitude versus frequency curves. From the amplitude of these Vf curves, the type and extent of the mechanical defects can be estimated. This investigation shows that the new coupler device can be effectively used for health monitoring of underwater pipelines using guided waves.

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15

Staszewski, W. J. "Ultrasonic/Guided Waves for Structural Health Monitoring". Key Engineering Materials 293-294 (septiembre de 2005): 49–62. http://dx.doi.org/10.4028/www.scientific.net/kem.293-294.49.

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Structural damage detection and monitoring is one of the major maintenance activities in transportation, processing and civil engineering. Current procedures are based on scheduled inspections which are often time/labour consuming and expensive. Guided ultrasonic waves offer the ability of inspecting large structures with a small number of transducers. Recent developments in smart sensor technologies allow for integration of these transducers with monitored structures. This is associated with a new design philosophy leading to more efficient and economically attractive structures. The paper briefly discusses various damage detection methods based on structural, ultrasonic and guided ultrasonic waves. The focus is on recent research advances in damage monitoring techniques, smart sensor technologies and signal processing.

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16

Liu, Yang, Huaming Mai, Mengfei Cheng, Hongzhao Li, Weiwei Zhang y Rong Lin. "Defect detection for polyethylene pipelines based on ultrasonic-guided waves". Journal of Physics: Conference Series 2897, n.º 1 (1 de noviembre de 2024): 012057. https://doi.org/10.1088/1742-6596/2897/1/012057.

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Abstract The identification of small non-penetrating defects in polyethylene (PE) pipes, utilizing ultrasonic-guided waves, serves as the cornerstone for ensuring the safe operation of these pipes. However, owing to the PE pipe material characteristics, the guided wave has high attenuation in PE pipe, which seriously limits the detection range and accuracy of the guided wave. To address this problem, the dispersion and dissipation characteristics of ultrasonic-guided waves in PE pipes were derived, and the results indicated that the excitation frequency was the important parameter affecting the propagation distance. Then, an experimental platform for PE pipe testing was built using macro fiber composites. The acoustic attenuation coefficient and dispersion were calculated. After considering the effects of dissipation and dispersion on the guided wave, the optimal excitation frequency was selected to extend the guided wave detection distance to 4 m. Finally, an experimental study on ultrasonic-guided wave detection of defects in PE pipes was conducted. The experimental results showed that non-penetrating small defects with a section loss rate of 8% could be effectively identified and located using ultrasonic-guided waves.

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17

Niu, Xiaochuan, Liqiang Zhu, Wenlin Yang, Zujun Yu y Haikuo Shen. "Temperature Effects on Nonlinear Ultrasonic Guided Waves". Materials 16, n.º 9 (5 de mayo de 2023): 3548. http://dx.doi.org/10.3390/ma16093548.

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Nonlinear ultrasonic guided waves have attracted increasing attention in the field of structural health monitoring due to their high sensitivity and long detection distance. In practical applications, the temperature of the tested structure will inevitably change, so it is essential to evaluate the effects of temperature on nonlinear ultrasonic guided waves. In this paper, an analytical approach is proposed to obtain the response law of nonlinear guided waves to temperature based on the semi-analytical finite element (SAFE) method. The plate structure is investigated as a demonstration example, and the corresponding simulation analysis and experimental verification are carried out. The results show that the variation trends of different cumulative second harmonic modes with temperature are distinct, and their amplitudes monotonically increase or decrease with the continuously rising temperature. Therefore, in the applications with nonlinear ultrasonic guided waves, it is necessary to predict the changing trend of selected cumulative second harmonics under the action of temperature and compensate the result for the influence of temperature. The methods and conclusions presented in this paper are also applicable to other types of structures and have general practicality.

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18

Bu, Fanqiang, Wencong Wei, Xingguo Wang, Xiaogao Li, Guolang Shen, Chengwen Ma y Guoxing Tang. "Weakening Detection of Composite Structure Adhesive Layer Based on Nonlinear Guided Waves". Applied Sciences 15, n.º 4 (11 de febrero de 2025): 1836. https://doi.org/10.3390/app15041836.

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In this study, a detection method utilizing nonlinear ultrasonic guided waves is presented to tackle the difficulties in detecting localized damage and weakening in bonded composite structures. For a three-layer structure made of polystyrene, acrylic resin, and aluminum plate, dispersion equations for ultrasonic guided waves were developed using the spring model and wave equation. The A1-S1 mode was selected by examining the material parameters’ influence on the adhesive layer’s dispersion curves. The finite element method was employed to simulate the propagation characteristics of ultrasonic guided waves within the composite structure. The error between the theoretically calculated and simulated group velocities was less than 5.15%. As the propagation distance increased, both the nonlinearity coefficient and the amplitude of the second-order harmonic showed an upward trend. This indicates a significant accumulation effect at the second harmonic of nonlinear guided waves. Compared to without adhesive layer weakening, localized and overall weakening resulted in higher amplitudes of the second-order harmonic. Experimental testing of ultrasonic guided waves was conducted to investigate the nonlinear properties of the composite structure. The error between the experimentally measured and theoretically calculated group velocities was less than 6.96%. The experimental results corroborated the propagation accumulation effect of the second-order harmonic amplitude.

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Park, Ik Keun, Tae Hyung Kim, Hyun Mook Kim, Yong Kwon Kim, Yong Sang Cho y Won Joon Song. "Evaluation of Hidden Corrosion in a Thin Plate Using a Non-Contact Guided Wave Technique". Key Engineering Materials 321-323 (octubre de 2006): 492–96. http://dx.doi.org/10.4028/www.scientific.net/kem.321-323.492.

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In this paper, study on evaluation of thickness reduction in a thin plate with guided waves is presented. Ultrasonic guided wave techniques have been widely studied and successfully applied to various non-destructive tests with the advantage of long range inspection. In addition to application of guided waves to NDT, non-contact methods for ultrasonic wave generation and detection have become very useful and well combined with guided wave techniques due to their capability of ultrasonic wave generation and reception in surface of high temperature or on rough surface. An advanced non-contact technique for detection of thickness reduction simulating hidden corrosion in thin plates using guided waves is proposed. The proposed approach uses EMAT(Electro-Magnetic Acoustic Transducer) for the non-contact generation and detection of guided waves in aluminum plates. Interesting features of the dispersive behavior in selected wave modes are used to detect plate thinning. The experimental results show that the mode cutoff measurements provide a qualitative measurement of thinning detects and change in the mode group velocity can be used as quantitative parameter of thinning depth measurement.

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20

Nucera, Claudio, Robert Phillips y Francesco Lanza di Scalea. "Ultrasonic Guided Wave Monitoring of Railroad Tracks". Advances in Science and Technology 83 (septiembre de 2012): 198–207. http://dx.doi.org/10.4028/www.scientific.net/ast.83.198.

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Among structural concerns for the safety of rail transportation are internal flaws and thermal stresses, both of which can cause disruption of service and even derailments. Ultrasonic guided waves lend themselves to addressing both of these problems. This paper reports on two inspection systems for rails being developed at UCSD under the auspices of the US Federal Railroad Administration. Both systems utilize ultrasonic guided waves as the main probing mechanism, for the two different applications of flaw detection and thermal stress detection.

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21

Rose, Joseph L. "Ultrasonic Guided Waves in Structural Health Monitoring". Key Engineering Materials 270-273 (agosto de 2004): 14–21. http://dx.doi.org/10.4028/www.scientific.net/kem.270-273.14.

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22

Rajagopal, Prabhu y Roson Kumar Pattanayak. "Ultrasonic guided waves in elliptical annular cylinders". Journal of the Acoustical Society of America 138, n.º 3 (septiembre de 2015): EL336—EL341. http://dx.doi.org/10.1121/1.4930009.

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23

Kural, A., R. Pullin, C. Featherston, C. Paget y K. Holford. "Wireless power transmission using ultrasonic guided waves". Journal of Physics: Conference Series 305 (19 de julio de 2011): 012088. http://dx.doi.org/10.1088/1742-6596/305/1/012088.

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24

Yaacoubi, Slah, Lynda Chehami, Marwen Aouini y Nico F. Declercq. "Ultrasonic guided waves for reinforced plastics safety". Reinforced Plastics 61, n.º 2 (marzo de 2017): 87–91. http://dx.doi.org/10.1016/j.repl.2016.12.002.

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25

Singher, Liviu. "Bond strength measurement by ultrasonic guided waves". Ultrasonics 35, n.º 4 (junio de 1997): 305–15. http://dx.doi.org/10.1016/s0041-624x(96)00109-6.

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26

Lissenden, Clifford J. "Applied Sciences Special Issue: Ultrasonic Guided Waves". Applied Sciences 9, n.º 18 (15 de septiembre de 2019): 3869. http://dx.doi.org/10.3390/app9183869.

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The propagation of ultrasonic guided waves in solids is an important area of scientific inquiry due primarily to their practical applications for the nondestructive characterization of materials, such as nondestructive inspection, quality assurance testing, structural health monitoring, and for achieving material state awareness [...]

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Da, Yihui, Guirong Dong, Yan Shang, Bin Wang, Dianzi Liu y Zhenghua Qian. "Circumferential defect detection using ultrasonic guided waves". Engineering Computations 37, n.º 6 (24 de febrero de 2020): 1923–43. http://dx.doi.org/10.1108/ec-06-2019-0260.

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Purpose Quantitatively detecting surface defects in a circular annulus with high levels of accuracy and efficiency has been paid more attention by researchers. The purpose of this study is to investigate the theoretical dispersion equations for circumferential guided waves and then develop an efficient technique for accurate reconstruction of defects in pipes. Design/methodology/approach The methodology applied to determine defects in pipelines includes four steps. First, the theoretical work is carried out by developing the appropriate dispersion equations for circumferential guided waves in a pipe. In this phase, formulations of strain-displacement relations are derived in a general equidistant surface coordinate. Following that, a semi-analytical finite element method (SAFEM) is applied to solve the dispersion equations. Then, the scattered fields in a circular annulus are calculated using the developed hybrid finite element method and simulation results are in accord with the law of conservation of energy. Finally, the quantitative detection of Fourier transform (QDFT) approach is further enhanced to efficiently reconstruct the defects in the circular annuli, which have been widely used for engineering applications. Findings Results obtained from four numerical examples of flaw detection problems demonstrate the correctness of the developed QDFT approach in terms of accuracy and efficiency. Reconstruction of circumferential surface defects using the extended QDFT method can be performed without involving the analytical formulations. Therefore, the streamlined process of inspecting surface defects is well established and this leads to the reduced time in practical engineering tests. Originality/value In this paper, the general dispersion equations for circumferential ultrasonic guided waves have been derived using an equidistant surface coordinate and solved by the SAFEM technique to discover the relationship between wavenumber of a wave and its frequency. To reconstruct defects with high levels of accuracy and efficiency, the QDFT approach has been further enhanced to inspect defects in the annular structure.

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Nagashima, Yoshiaki, Masao Endou y Isao Kouga. "ICONE15-10637 Discontinuity-length Sizing Potential Using Ultrasonic Guided Waves in Pipes". Proceedings of the International Conference on Nuclear Engineering (ICONE) 2007.15 (2007): _ICONE1510. http://dx.doi.org/10.1299/jsmeicone.2007.15._icone1510_350.

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Lv, Wen Chao, Shao Ping Zhou y Ai Qiang Cui. "Research on the Nondestructive Detection of Ultrasonic Guided Wave Based on the Time Reversal Method". Applied Mechanics and Materials 330 (junio de 2013): 996–1002. http://dx.doi.org/10.4028/www.scientific.net/amm.330.996.

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Because there are many mode transformations when the ultrasonic guided waves run into defects in the pipeline, the reflected signals got by means of the traditional ultrasonic guided wave technique are complex and the amplitudes are small. The time reversal method is a way to intercept the reflected signals in the initial results with a certain bandwidth and excite the time reversal guided waves on the corresponding nodes. In this way, energies of the guided wave are focused in time and space. By comparing the accuracy of defects identification in the straight pipes and the bent pipes with the traditional ultrasonic guided wave method and the time reversal method, this paper proves that the time reversal method has many advantages over the tradition ultrasonic guided wave method. The time reversal method overcomes disadvantages of the traditional guided wave technique and improves the identification degree and accuracy of defects effectively. It lays the foundation for the final defect identification.

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30

Kim, Young H., Sung Jin Song, Joon Soo Park, Jae Hee Kim y Heung Seop Eom. "Mode Tuning of Guided Wave in a Seamless Stainless Steel Tube Using an Array Transducer". Key Engineering Materials 297-300 (noviembre de 2005): 2077–82. http://dx.doi.org/10.4028/www.scientific.net/kem.297-300.2077.

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Ultrasonic guided waves have been widely employed for the long range inspection of structures such as plates and pipes. In ultrasonic guided waves, however, there are numerous modes with different wave velocities, so that the generation and detection of the appropriate wave mode of the guided wave is one of key techniques in the application of guided waves. In the present work, mode tuning using an array transducer was investigated with hardware implements. For this purpose, 8-channel ultrasonic pulser and their controller which enables sequential activation of each channels with given time delay were developed. Transmitter tuning, group velocity measurements, reciver tuning, mode identification and long range transmission testing were carried out. As a result, the selective tuning of wave mode can be achieved by changing the time interval between adjacent elements of an array transducer.

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31

Kim, Hak Joon, Sung Jin Song, Jung Ho Seo, Jae Hee Kim y Heung Seop Eom. "Time Reversal Technique for Ultrasonic Guided Wave Inspection". Key Engineering Materials 321-323 (octubre de 2006): 776–79. http://dx.doi.org/10.4028/www.scientific.net/kem.321-323.776.

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For the long range inspection of structures in nuclear power plant using array transducers, it is necessary to focus waves on defects under interrogation. To take care of such a need, in this study we adopt a time reversal technique that is claimed to be very robust to focus ultrasonic waves on defects. Specifically, we calculate the appropriate time delay using the time reversal technique and re-generate ultrasonic guided waves that are focusing to an interrogated defect with the calculated time delay. In this paper, we describe the principle of the time reversal technique briefly and present the performance enhancement obtained by the time reversal techniques.

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Moll, Jochen, Jens Kathol, Claus-Peter Fritzen, Maria Moix-Bonet, Marcel Rennoch, Michael Koerdt, Axel S. Herrmann, Markus GR Sause y Martin Bach. "Open Guided Waves: online platform for ultrasonic guided wave measurements". Structural Health Monitoring 18, n.º 5-6 (11 de diciembre de 2018): 1903–14. http://dx.doi.org/10.1177/1475921718817169.

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Ultrasonic guided waves have been used successfully in structural health monitoring systems to detect damage in isotropic and composite materials with simple and complex geometry. A limitation of current research is given by a lack of freely available benchmark measurements to comparatively evaluate existing methods. This article introduces the extendable online platform Open Guided Waves ( http://www.open-guided-waves.de ) where high-quality and well-documented datasets for guided wave-based inspections are provided. In this article, we describe quasi-isotropic carbon-fiber-reinforced polymer plates with embedded piezoelectric transducers as a first benchmark structure. Intentionally, this is a structure of medium complexity to enable many researchers to apply their methods. In a first step, ultrasound and X-ray measurements were acquired to verify pristine conditions. Next, mechanical testing was done to determine the stiffness tensor and sample density based on standard test procedures. Guided wave measurements were divided into two parts: first, acoustic wave fields were acquired for a broad range of frequencies by three-dimensional scanning laser Doppler vibrometry. Second, structural health monitoring measurements in the carbon-fiber-reinforced polymer plate were collected at constant temperature using a distributed transducer network and a surface-mounted reversible defect model. Initial results serving as validation are presented and discussed.

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Chaboty, Aubin, Vu-Hieu Nguyen, Guillaume Haiat y Pierre Bélanger. "Cortical bone plate properties assessment using inversion of axially transmitted low frequency ultrasonic guided waves". Journal of the Acoustical Society of America 156, n.º 2 (1 de agosto de 2024): 954–67. http://dx.doi.org/10.1121/10.0028173.

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Over the past few decades, early osteoporosis detection using ultrasonic bone quality evaluation has gained prominence. Specifically, various studies focused on axial transmission using ultrasonic guided waves and have highlighted this technique's sensitivity to intrinsic properties of long cortical bones. This work aims to demonstrate the potential of low-frequency ultrasonic guided waves to infer the properties of the bone inside which they are propagating. A proprietary ultrasonic transducer, tailored to transmit ultrasonic guided waves under 500 kHz, was used for the data collection. The gathered data underwent two-dimensional fast Fourier transform processing to extract experimental dispersion curves. The proposed inversion scheme compares experimental dispersion curves with simulated dispersion curves calculated through the semi-analytical iso-geometric analysis (SAIGA) method. The numerical model integrates a bone phantom plate coupled with a soft tissue layer on its top surface, mimicking the experimental bone phantom plates. Subsequently, the mechanical properties of the bone phantom plates were estimated by reducing the misfit between the experimental and simulated dispersion curves. This inversion leaned heavily on the dispersive trajectories and amplitudes of ultrasonic guided wave modes. Results indicate a marginal discrepancy under 5% between the mechanical properties ascertained using the SAIGA-based inversion and those measured using bulk wave pulse-echo measurements.

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Saikrishna, U., K. Srinivas y Y. L. V. D. Prasad. "Development of Guided Wave Ultrasonic Inspection Method for Thick Composite Structures". Applied Mechanics and Materials 592-594 (julio de 2014): 153–57. http://dx.doi.org/10.4028/www.scientific.net/amm.592-594.153.

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Ultrasonic Non-destructive testing is a well known technique for inspecting fiber reinforced composite structures however; its capability is severely limited by the high attenuation in thick and multi layer structures. Guided wave ultrasonic inspection has been reported to be useful tool for quantitative identification of composite structures. It takes advantage of tailoring / generating desired ultrasonic wave modes (Symmetric and anti-symmetric) for improved transmission through the composite structure. For this, guided waves have to be generated selectively by precisely placing transducer at an angle to the test surface. Automation of two axis fixture for transmission and reception of transducers have to be used for avoiding manual errors. The captured signals have to be processed in order to extract useful information from the received ultrasonic signals. The proposed project aims at developing automated guided wave inspection methods along with digital signal processing for generating dispersion curves for thick composited. Using test laminates with implanted defects, methodology for thick composite inspection with guided wave ultrasonic’s will be established. For this data will be captured and analyzed using Labview software.

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35

Bagheri, Abdollah, Kaiyuan Li y Piervincenzo Rizzo. "Reference-free damage detection by means of wavelet transform and empirical mode decomposition applied to Lamb waves". Journal of Intelligent Material Systems and Structures 24, n.º 2 (27 de septiembre de 2012): 194–208. http://dx.doi.org/10.1177/1045389x12460433.

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Guided ultrasonic waves are increasingly used in all those structural health monitoring applications that benefit from built-in transduction, moderately large inspection ranges, and high sensitivity to small flaws. This article describes a monitoring system based on the generation and detection of the guided ultrasonic waves from an array of sparse transducers. In a round-robin manner, ultrasonic waves are generated and measured from all possible different pairs of excitation and sensing transducers. The ultrasonic signals are then processed using continuous wavelet transform and empirical mode decomposition to extract few damage-sensitive features that enable the detection and localization of damage. With respect to most of the existing guided ultrasonic wave–based methods, the proposed approach does not require to record data from a pristine structure (baseline data), and damage is inferred by examining the selected features obtained from all the possible combinations of actuator–sensor pairs of the array. In this study, the method is validated using commercial finite element software to model the presence of 10 ultrasonic transducers bonded onto an aluminum plate. The results are promising and ongoing studies are focusing on the experimental validation and the application to other waveguides.

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36

Chaboty, Aubin A., Vu-Hieu Nguyen, Guillaume Haiat y Pierre Belanger. "Cortical bone properties assessment using axially transmitted low frequency (<500 kHz) guided waves". Journal of the Acoustical Society of America 154, n.º 4_supplement (1 de octubre de 2023): A296. http://dx.doi.org/10.1121/10.0023581.

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The early diagnosis of osteoporosis through bone quality assessment has been extensively studied in the past decade. Research in axial transmission using ultrasonic guided waves has shown the method to be sensitive to intrinsic properties of long cortical bone. The aim of this work is, therefore, to show the capability of low frequency guided waves to enable the inversion of dispersion curves into bone properties. The proposed inversion scheme relies on dispersion curves simulated using the semi-analytical iso-geometric analysis (SAIGA) method. The model used in simulation comprised a bone phantom plate with a layer of soft tissue attached to the top surface in accordance with experimental bone phantom plates. A proprietary axial transmission multielement ultrasonic transducer specifically designed to excite ultrasonic guided waves under 500 kHz was used for measurements. Acquired data were processed using the 2-D Fast Fourier Transform to extract dispersion curves. The mechanical properties of the bone phantom plates were obtained by minimizing the difference between the experimental and simulated dispersion curves. The inversion was based on the dispersive properties of ultrasonic guided waves as well as their amplitudes. Results show a difference around 5% between the mechanical properties found with the SAIGA based inversion and those provided by the manufacturer of the plates.

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37

Philibert, Marilyne y Kui Yao. "Explore Ultrasonic-Induced Mechanoluminescent Solutions towards Realising Remote Structural Health Monitoring". Sensors 24, n.º 14 (16 de julio de 2024): 4595. http://dx.doi.org/10.3390/s24144595.

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Ultrasonic guided waves, which are often generated and detected by piezoelectric transducers, are well established to monitor engineering structures. Wireless solutions are sought to eliminate cumbersome wire installation. This work proposes a method for remote ultrasonic-based structural health monitoring (SHM) using mechanoluminescence (ML). Propagating guided waves transmitted by a piezoelectric transducer attached to a structure induce elastic deformation that can be captured by elastico-ML. An ML coating composed of copper-doped zinc sulfide (ZnS:Cu) particles embedded in PVDF on a thin aluminium plate can be used to achieve the elastico-ML for the remote sensing of propagating guided waves. The simulation and experimental results indicated that a very high voltage would be required to reach the threshold pressure applied to the ML particles, which is about 1.5 MPa for ZnS particles. The high voltage was estimated to be 214 Vpp for surface waves and 750 Vpp for Lamb waves for the studied configuration. Several possible technical solutions are suggested for achieving ultrasonic-induced ML for future remote SHM systems.

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38

Zhou, Fang Jun, Yue Min Wang, Chuan Jun Shen, Feng Rui Sun y Hong Tao Zhang. "Application of Ultrasonic Guided Waves Testing Method in Coiled Springs". Applied Mechanics and Materials 127 (octubre de 2011): 449–54. http://dx.doi.org/10.4028/www.scientific.net/amm.127.449.

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In this paper,application of defect detection by ultrasonic guided waves in springs has been studied in three aspects,which are theoretical calculation, simulation modeling and experiments.For the springs structure is helix and it can not be directly described easily,less work has been done on theoretical calculation of elastic wave propagation in the springs.The elastic wave equation of the spiral structure is established and calculated numerically here,considering the theoretical calculation helps to quantitative analyze the law of elastic wave propagation in the springs.Then guided waves dispersion relations corresponding is achieved.The experimental results of spring field testing agree well with the theoretical calculations and simulations,indicating the effectiveness of ultrasonic guided waves inspection in springs.

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39

Li, Hong Yuan y Hong Xu. "Damage Detection for Structural Health Monitoring Using Ultrasonic Guided Waves". Key Engineering Materials 525-526 (noviembre de 2012): 433–36. http://dx.doi.org/10.4028/www.scientific.net/kem.525-526.433.

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The use of ultrasonic guided waves for damage detection suffers from the multi-modes and dispersion. Much attention has been paid to transducer design and excitation frequency chosen to suppress the multiple modes and dispersion. However, little attention has been paid to complex signal processing. In this paper, the dispersive propagation of the guided waves are firstly reviewed. And then the matching pursuit method is introduced as a feature extraction algorithm. In order to present well the characteristic of the guided waves signal, a dispersive dictionary is designed based on the guided waves propagation. A two-stage pursuit method consisted of coarse and fine matching is used. At last, the proposed method is verified by finite element simulation and successfully extracted damage related dispersive pulses from measured noisy signal.

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40

Lissenden, Cliff J. "Nonlinear ultrasonic guided waves—Principles for nondestructive evaluation". Journal of Applied Physics 129, n.º 2 (14 de enero de 2021): 021101. http://dx.doi.org/10.1063/5.0038340.

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41

Bartoli, Ivan, Robert Phillips, Stefano Coccia, Ankit Srivastava, Francesco Lanza di Scalea, Mahmood Fateh y Gary Carr. "Stress Dependence of Ultrasonic Guided Waves in Rails". Transportation Research Record: Journal of the Transportation Research Board 2159, n.º 1 (enero de 2010): 91–97. http://dx.doi.org/10.3141/2159-12.

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42

WU, Wenjun. "Dispersion-based Mode Identification of Ultrasonic Guided Waves". Journal of Mechanical Engineering 53, n.º 18 (2017): 10. http://dx.doi.org/10.3901/jme.2017.17.010.

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43

Ono, Kanji. "On the Piezoelectric Detection of Guided Ultrasonic Waves". Materials 10, n.º 11 (18 de noviembre de 2017): 1325. http://dx.doi.org/10.3390/ma10111325.

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44

Petcher, P. A. y S. Dixon. "Mode mixing in shear horizontal ultrasonic guided waves". Nondestructive Testing and Evaluation 32, n.º 2 (22 de julio de 2016): 113–32. http://dx.doi.org/10.1080/10589759.2016.1184268.

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45

SHAH, ARVIND y ABDEL-RAHMAN MAHMOUD. "COMPUTATIONAL METHODS FOR GUIDED ULTRASONIC WAVES IN PLATES". International Journal of Computational Methods 03, n.º 01 (marzo de 2006): 35–55. http://dx.doi.org/10.1142/s0219876206000576.

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Reducing the general problem of computing three-dimensional Green's function in a transversely isotropic plate to a finite summation of contributions from a series of planar problems can efficiently yield an accurate solution. Hence, solving the planar scattering problem, of the Pressure-Shear-Vertical (PSV) type or the Shear-Horizontal (SH) type, was performed by three different techniques: The boundary element method; the hybrid method; and the perfectly matched layer method. In the pursuit of these methods, the objective was to highlight their pros and cons in terms of accuracy and efficiency.

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46

Apetre, N. y M. Ruzzene. "Spectral and perturbation analysis for ultrasonic guided waves". Journal of Sound and Vibration 331, n.º 24 (noviembre de 2012): 5358–69. http://dx.doi.org/10.1016/j.jsv.2012.06.003.

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47

Thakare, Dhawal, Pierre Belanger y Prabhu Rajagopal. "Ultrasonic guided waves in bone system with degradation". Journal of the Acoustical Society of America 138, n.º 3 (septiembre de 2015): 1798. http://dx.doi.org/10.1121/1.4933705.

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48

Zhu, Jinying y Hongbin Sun. "Monitoring hardening of concrete using ultrasonic guided waves". Journal of the Acoustical Society of America 138, n.º 3 (septiembre de 2015): 1885. http://dx.doi.org/10.1121/1.4933913.

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De Marchi, L., A. Marzani, S. Caporale y N. Speciale. "Ultrasonic guided-waves characterization with warped frequency transforms". IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control 56, n.º 10 (octubre de 2009): 2232–40. http://dx.doi.org/10.1109/tuffc.2009.1305.

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50

Loveday, Philip W., Craig S. Long y Dineo A. Ramatlo. "Mode repulsion of ultrasonic guided waves in rails". Ultrasonics 84 (marzo de 2018): 341–49. http://dx.doi.org/10.1016/j.ultras.2017.11.014.

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