Results 51 to 60 of about 11,411 (229)
Wireless Energy Supply to Aircraft Structural Health Monitoring Nodes Using Ultrasonic Lamb Waves
Fatigue of Aircraft Structures, 2014 This article is based on research done during the author’s PhD at Cardiff University, UK. A prototype of a novel wireless energy transmission system aimed at the use with wireless aircraft structural health monitoring (SHM) sensor nodes is described. The
Kural Aleksander
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Damage localization method using ultrasonic lamb waves and Wav2Vec2.0 neural network
Frontiers in Materials, 2023 In this paper, a Wav2Vec2.0 neural network based on an attention mechanism is proposed to locate defects in array ultrasonic testing signals. This method does not require knowledge of the a priori condition of the sample sound velocity or the feature ...
Lubin Qian +7 more
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Nondestructive characterization of the elastic properties of orthotropic composites with ultrasound [PDF]
, 2011 Due to the increasing use of composite materials in critical applications demanding light weight to high strength ratio, reliable evaluation tools are necessary.
Degrieck, Joris +5 more
core
, 2017 The fundamental shear horizontal (SH0) wave in plates is of great importance in the field of nondestructive testing (NDT) and structural health monitoring (SHM) since it is the unique non-dispersive guided wave mode.
Huan, Qiang, Li, Faxin, Miao, Hongchen
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Ultrasonic metal sheet thickness measurement without prior wave speed calibration [PDF]
, 2013 Conventional ultrasonic mensuration of sample thickness from one side only requires the bulk wave reverberation time and a calibration speed. This speed changes with temperature, stress, and microstructure, limiting thickness measurement accuracy ...
Dixon, S. +4 more
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Measurements of dispersion of ultrasonic wave velocity in thin layers by the ultrasonic spectroscopy
Archives of Acoustics, 2014 This paper presents the results of measurements of the phase velocity dispersion of ultrasonic waves in thin aluminium sheets. The interaction between ultrasonic waves and a thin solid layer is analysed and the theoretical relations for the transmission ...
W. WOJDOWSKI
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Laser beam shaping for enhanced Zero-Group Velocity Lamb modes generation
, 2016 Optimization of Lamb modes induced by laser can be achieved by adjusting the spatial source distribution to the mode wavelength ($\lambda$). The excitability of Zero-Group Velocity (ZGV) resonances in isotropic plates is investigated both theoretically ...
Bruno, François +4 more
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A match coefficient approach for damage imaging in structural components by ultrasonic synthetic aperture focus [PDF]
, 2017 Ultrasonic Synthetic Aperture Focus (SAF) techniques are commonly used to image structural defects. In this paper, a variation of SAF based on ideas borrowed from Matched Field Processing (MFP) is evaluated to reduce artifacts and sidelobes of the ...
Lanza di Scalea, F. +4 more
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Review on static component generation of ultrasonic waves in solid media
AIP AdvancesIn nonlinear ultrasonics (NLU), in addition to the well-known second harmonic generation (SHG), a static component (SC) generation occurs when a primary ultrasonic wave propagates through a solid with quadratic elastic nonlinearity.
Xiang Wan +5 more
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Sensors, 2021 Ultrasonic guided waves are already used for material characterization. The advantage of these waves is that they propagate in the plane of a plate and their propagation characteristics are sensitive to properties of the material.
Rymantas Jonas Kažys, Olgirdas Tumšys
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