Results 11 to 20 of about 4,693 (226)
Sensors, 2022 This article proposes an electromagnetic acoustic transducer (EMAT) for selectively improving the purity and amplitude of ultrasonic Lamb waves in non-ferromagnetic plates. The developed EMAT consists of a racetrack coil and a group of periodic permanent
Xinfeng Guo +3 more
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Applied Sciences, 2022 The Lamb waves are named one of the promising solutions for future wind turbine blade (WTB) failure prevention. The compliance with safety assurance of WTBs by detecting structural changes during the manufacture and performing their monitoring during the
Lina Draudvilienė +5 more
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A Lamb wave lens for acoustic microscopy [PDF]
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 1992 In a conventional scanning acoustic microscope the excited leaky modes contribute significantly to the high contrast obtained in the images. However, all such modes exist simultaneously, and the interpretation of the images is not straightforward, especially in layered media.
Atalar, A., Koymen H., Degertekin F.L.
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Atmosphere, 2022 The Tonga volcano erupted on 15 January 2022, at 04:15:45 UTC, which significantly influenced the atmosphere and space environment, at the same time, an unprecedented opportunity to monitor ionospheric anomalies is provided by its powerful eruption.
Qiaoli Kong +7 more
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Focusing higher-order Lamb waves based on the Luneburg lens
Frontiers in Physics, 2023 In order to improve the spatial resolution and the signal-to-noise ratio of Lamb waves in structural health monitoring systems or non-destructive testing techniques, this study presents the construction of Luneburg lenses for focusing higher-order Lamb ...
Tianming Ye +7 more
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Impact of Wedge Parameters on Ultrasonic Lamb Wave Liquid-Level Sensor
Sensors, 2022 The ultrasonic Lamb wave detection principle can realize the noncontact measurement of liquid level in closed containers. When designing an ultrasonic Lamb wave sensor, it is vital to thoroughly study and select the optimal wedge size at the front of the
Weizhao Xue +4 more
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Application of non-contact ultrasonic method in air to study fiber-cement corrugated boards [PDF]
Bulletin of the Polish Academy of Sciences: Technical Sciences, 2021 The fiber-cement and cellulose boards are materials commonly used in architectural engineering for exterior and interior applications such as building facades or as wall and roof covering materials.
Radosław Drelich +2 more
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Mechanical Engineering Journal, 2014 The bonding quality of an adhesive component was estimated using the frequency of zero-group-velocity (ZGV) Lamb waves, which can be generated and detected with a laser ultrasonic technique.
Hideo CHO, Yudai YAGUCHI, Hiroaki ITO
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Investigation of Lamb Waves Propagation in Variable Stiffness Fiber Metal Laminated Plates Using Finite Element Method [PDF]
مکانیک هوافضا, 2023 Lamb waves are mechanically guided waves that propagate through plates and shells, and their speed depends on the frequency. Nowadays, researchers use these waves to detect defects in structures.
Hadi Ghashochi-Bargh, Melina Hasani
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Multiple reflections of Lamb waves at a delamination [PDF]
Ultrasonics, 2002 Wave propagation in laminated plates with delaminations was calculated using the semi-analytical finite element method. The visualization results and deeper numerical analyses revealed the following phenomena on the fundamental Lamb modes at delamination regions of laminated plates.
Hayashi, Takahiro, Kawashima, Koichiro
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