Results 1 to 10 of about 4,693 (226)

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

A Guided Wave Sensor Enabling Simultaneous Wavenumber-Frequency Analysis for Both Lamb and Shear-Horizontal Waves

open access: yesSensors, 2017
Guided waves in plate-like structures have been widely investigated for structural health monitoring. Lamb waves and shear horizontal (SH) waves, two commonly used types of waves in plates, provide different benefits for the detection of various types of
Baiyang Ren   +2 more
doaj   +3 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

Experimental Investigation of One-Way Lamb and SH Mixing Method in Composite Laminates [PDF]

open access: yesSensors
This paper experimentally investigates the resonant behavior of the one-way Lamb and SH (shear horizontal) mixing method in composite laminates with inherent quadratic nonlinearity, delamination damage and impact damage. When the fundamental S0-mode Lamb
Siyang Xie, Youxuan Zhao, Yuzi Liu
doaj   +2 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

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