Imaging gigahertz zero-group-velocity Lamb waves [PDF]
Nature Communications, 2019 AbstractZero-group-velocity (ZGV) waves have the peculiarity of being stationary, and thus locally confining energy. Although they are particularly useful in evaluation applications, they have not yet been tracked in two dimensions. Here we image gigahertz zero-group-velocity Lamb waves in the time domain by means of an ultrafast optical technique ...
Sylvain Mezil +2 more
exaly +7 more sources
A non-destructive technique using digital holographic vibrometry and Lamb waves for quality determination of polymer-metal laminates [PDF]
Scientific 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]
Micromachines, 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]
Sensors, 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
Experimental Investigation of One-Way Lamb and SH Mixing Method in Composite Laminates [PDF]
SensorsThis 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
Metals, 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]
Journal 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
Seismica, 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
Applied 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
Integrating microfluidics and biosensing on a single flexible acoustic device using hybrid modes [PDF]
, 2020 Integration of microfluidics and biosensing functionalities on a single device holds promise in continuous health monitoring and disease diagnosis for point-of-care applications.
Dodd, Linzi +10 more
core +5 more sources