Results 241 to 250 of about 2,905,814 (268)
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Lamb waves and lamination detection
Ultrasonics, 1967Abstract Lamb waves at the fundamental, and of higher orders, can be excited with sufficient intensity for lamination detection in thick plates if large-area probes and long acoustic pulses are used. Hot-rolled steel plates up to 16mm in thickness can be tested, and clear and unambiguous results obtained.
E. Lehfeldt, P. Höller
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High Figure-of-Merit Lamb Wave Resonators Based on Al0.7Sc0.3N Thin Film
IEEE Electron Device Letters, 2021Shuai Shao, Zhifang Luo, Tao Wu
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Peridynamic modeling of Lamb wave propagation in bimaterial plates
Composite structures, 2019In this study the nonlocal bond-based peridynamic (PD) theory was applied to simulate Lamb wave transmission in 2D bimaterial plates. Plates of unlike materials were jointed end-to-end to make a bimaterial plate. The surface of the plate was then excited
R. Alebrahim
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Lamb wave-based acoustofluidics
The Journal of the Acoustical Society of AmericaBoth bulk acoustic wave (BAW) and surface acoustic wave (SAW) acoustofluidic technologies have been widely utilized for particle manipulation. However, within fluid, these waves tend to propagate as bulk waves or leaky bulk waves, resulting in undesirable acoustic streaming that causes unstable particle manipulation.
Feiyan Cai, Jiaqi Liu, Hairong Zheng
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IEEE Symposium on Ultrasonics, 2002
Initial experiments and theory describing the operation of gel-coated Lamb wave sensors are described. The lowest-order flexural Lamb wave can propagate in gel-coated plates with low attenuation. This allows some novel sensing approaches to be investigated, such as: using gels as filters for larger particles and molecules, while allowing smaller ...
B.J. Costello +3 more
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Initial experiments and theory describing the operation of gel-coated Lamb wave sensors are described. The lowest-order flexural Lamb wave can propagate in gel-coated plates with low attenuation. This allows some novel sensing approaches to be investigated, such as: using gels as filters for larger particles and molecules, while allowing smaller ...
B.J. Costello +3 more
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Mode selection of nonlinear Lamb wave based on approximate phase velocity matching
NDT & E international, 2019In the ultrasonic detection using nonlinear Lamb wave, only the cumulative second-harmonic Lamb wave is useful for the nondestructive evaluation of plate-like structures.
Ying Zhu +4 more
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Proceedings of 2nd International Electronic Conference on Sensors and Applications, 2015
Acoustic Lamb Wave microsensors are suitable for label free sensing in liquid. The device relies on the interaction between acoustic waves propagating within a thin membrane and the liquid. Lamb wave sensors have been previously studied using AlN/Si structure to detect multi-parameters of a liquid, such as its temperature, density, sound velocity and ...
Jean-Francois Manceau +3 more
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Acoustic Lamb Wave microsensors are suitable for label free sensing in liquid. The device relies on the interaction between acoustic waves propagating within a thin membrane and the liquid. Lamb wave sensors have been previously studied using AlN/Si structure to detect multi-parameters of a liquid, such as its temperature, density, sound velocity and ...
Jean-Francois Manceau +3 more
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Modeling and simulation of static component generation of Lamb wave propagation in a layered plate.
Ultrasonics, 2021Han Chen +4 more
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IEEE Transactions on Medical Imaging, 2018
Characterizing the viscoelastic properties of thin-layer tissues with micro-level thickness has long remained challenging. Recently, several micro-elastography techniques have been developed to improve the spatial resolution.
Cho-Chiang Shih +9 more
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Characterizing the viscoelastic properties of thin-layer tissues with micro-level thickness has long remained challenging. Recently, several micro-elastography techniques have been developed to improve the spatial resolution.
Cho-Chiang Shih +9 more
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Multi-parameter Lamb wave tomography
KSME International Journal, 2000This work shows that it is possible to obtain information about more than one parameter from acoustic field information. A variety of ultrasonic Lamb wave modes were utilized to reconstruct thickness and density of an isotropic plate. An image reconstruction of one parameter (thickness of a plate) was carried out for four cases, i.e., the lowest ...
Jae-Seung Choi, Ronald A. Kline
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