Results 71 to 80 of about 10,739 (209)
Simulation of ultrasonic lamb wave generation, propagation and detection for an air coupled robotic scanner [PDF]
, 2011 A computer simulator, to facilitate the design and assessment of a reconfigurable, air-coupled ultrasonic scanner is described and evaluated. The specific scanning system comprises a team of remote sensing agents, in the form of miniature robotic ...
Burnham, Kenneth +6 more
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Sensors, 2018 The symmetric zero-frequency mode induced by weak material nonlinearity during Lamb wave propagation is explored for the first time. We theoretically confirm that, unlike the second harmonic, phase-velocity matching is not required to generate the zero ...
Xiaoqiang Sun +9 more
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Efficiency of Ultrasonic Comb Transducers
Archives of Acoustics, 2013 Comb transducers are applied in ultrasonic testing for generation of Rayleigh or Lamb waves by scattering of the incident bulk waves onto surface waves at the pe- riodic comb-substrate interface.
Eugeniusz J. DANICKI
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Numerical modeling and measurement by pulsed television holography of ultrasonic displacement maps in plates with through-thickness defects [PDF]
, 2010 We present a novel numerical modeling of ultrasonic Lamb and Rayleigh wave propagation and scattering by through-thickness defects like holes and slots in homogeneous plates, and its experimental verification in both near and far field by a self ...
Amlani, Faisal +6 more
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Adhesive joint evaluation by ultrasonic interface and lamb waves [PDF]
Some results on the application of interface and Lamb waves for the study of curing of thin adhesive layers were summarized. In the case of thick substrates (thickness much more than the wave length) the interface waves can be used.
Rokhlin, S. I.
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Optimal Sensors Placement to Enhance Damage Detection in Composite Plates [PDF]
, 2014 This paper examines an important challenge in ultrasonic structural health monitoring (SHM), which is the problem of the optimal placement of sensors in order to accurately detect and localize damages.
COFFIGNAL, Gérard +5 more
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Evaluation of epoxy crosslinking using ultrasonic Lamb waves
International Journal of Adhesion and Adhesives, 2018 The use of epoxy adhesives in structural bonding provides lightweight materials, however the assessment of the integrity and quality of the joint is of critical concern. Thus it is essential to know if the adhesive is well crosslinked. This work deals with the nondestructive acoustic characterization of epoxy networks, representative of the adhesive ...
Gauthier, Camille +4 more
openaire +2 more sources
Advances in Mechanical Engineering, 2017 Damage-scattering signal extraction using conventional ultrasonic guided wave–based damage detection techniques requires the measurement of baseline data under pristine condition.
Dongsheng Li, Zihao Jing, Mengdao Jin
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Nihon Kikai Gakkai ronbunshu, 2015 Spot-welding is widely used in various fields of industries. Since the size and quality of a welded nugget are closely related to the bonding strength of the weld, its quantitative evaluation is important to improve the reliability of the welded ...
Chenyan XU, Ikuo IHARA
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Ultrasonic inspection of capillary tude [PDF]
, 2012 On the basis of improving the design of the immersion bath significantly enhanced the technical capabilities of ultrasonic testing equipment. In particular, reliably determined by defects such as longitudinal cracks and mark, nonmetallic inclusions ...
Буркин, С. П. +3 more
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