Results 1 to 10 of about 737,665 (254)

A non-destructive technique using digital holographic vibrometry and Lamb waves for quality determination of polymer-metal laminates [PDF]

open access: yesScientific Reports, 2022
We used digital holographic vibrometry (DHV) as a non-destructive method to detect debonding areas in laminates made of aluminum and polymer (polylactide, polyvinylidene fluoride or polycarbonate). At low frequencies (up to 30 kHz) $$A_0$$ A 0 Lamb waves
Jagoda Nowak-Grzebyta   +3 more
doaj   +2 more sources

Continuous Particle Aggregation and Separation in Acoustofluidic Microchannels Driven by Standing Lamb Waves [PDF]

open access: yesMicromachines, 2022
In this study, we realize acoustic aggregation and separation of microparticles in fluid channels driven by standing Lamb waves of a 300-μm-thick double-side polished lithium-niobate (LiNbO3) plate.
Jin-Chen Hsu, Chih-Yu Chang
doaj   +2 more sources

Defect Detection of Aluminium Plates Based on Near-Field Enhancement of Lamb Waves Generated Using an Electromagnetic Acoustic Tranducer [PDF]

open access: yesSensors, 2019
Ultrasonic testing is an important means to detect defacing defects, such as scratches and cracks, but when the size of these defects is smaller than the wavelength of ultrasonic waves, it is difficult to detect them using traditional methods like the ...
Peng Zhou, Chu Zhang, Ke Xu, Weiping Ren
doaj   +2 more sources

Multifrequency Identification and Exploitation in Lamb Wave Inspection [PDF]

open access: yesIEEE Access, 2019
Lamb wave inspection provides a promising method to assess the structural health status. However, Lamb wave modes exhibit different characteristics which vary with frequency significantly.
Zhe Wang   +4 more
doaj   +4 more sources

Mutual Interactions of Lamb Waves in Nonlinear Elastic Plates

open access: yesMetals, 2022
The mutual interactions of Lamb waves in nonlinear elastic plates are studied in this article. Many researchers have investigated the interactions of Lamb wave modes at nonlinear higher harmonics.
Shuyi Ma   +3 more
doaj   +1 more source

Detection of coatings within liquid-filled tubes and containers by mode conversion of leaky Lamb waves [PDF]

open access: yesJournal of Sensors and Sensor Systems, 2013
In this paper, a new acoustic sensor principle for coating detection within liquid-filled tubes and containers based on mode conversion of leaky Lamb waves is introduced.
M. Schmitt   +6 more
doaj   +1 more source

Ocean Surface Gravity Wave Excitation of Flexural Gravity and Extensional Lamb Waves in Ice Shelves

open access: yesSeismica, 2023
Flexure and extension of ice shelves in response to incident ocean surface gravity waves have been linked to iceberg calving, rift growth, and even disintegration of ice shelves.
Lauren Abrahams   +3 more
doaj   +1 more source

Modes Control of Lamb Wave in Plates Using Meander-Line Electromagnetic Acoustic Transducers

open access: yesApplied Sciences, 2020
The multimode and dispersion characteristics of Lamb waves make them difficult to apply to nondestructive evaluation. This paper presents a paired configuration of a meander-line coil electromagnetic acoustic transducer (EMAT) to generate a single-mode ...
Yinghong Zhang, Zhenghua Qian, Bin Wang
doaj   +1 more source

A Lorentz Force EMAT Design with Racetrack Coil and Periodic Permanent Magnets for Selective Enhancement of Ultrasonic Lamb Wave Generation

open access: yesSensors, 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
doaj   +1 more source

The Usefulness and Limitations of Ultrasonic Lamb Waves in Preventing the Failure of the Wind Turbine Blades

open access: yesApplied 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
doaj   +1 more source

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