Results 61 to 70 of about 1,309 (186)

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
doaj  

Interaction of Lamb Wave Modes with Weak Material Nonlinearity: Generation of Symmetric Zero-Frequency Mode

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, Xiangyan Ding, Feilong Li, Shijie Zhou, Yaolu Liu, Ning Hu, Zhongqing Su, Youxuan Zhao, Jun Zhang, Mingxi Deng   +9 more
doaj   +1 more source

Plate-like structure damage location identification based on Lamb wave baseline-free probability imaging method

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
doaj   +1 more source

Non-contact evaluation of spot-welded nugget size based on measuring diffracted Lamb waves by focused air-coupled ultrasound

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
doaj   +1 more source

Application of Air-Coupled Ultrasonic Arrays for Excitation of a Slow Antisymmetric Lamb Wave

Sensors, 2018
Air-coupled excitation and reception of ultrasonic guided waves is already used for non-destructive testing and evaluation (NDT & E). Usually for air-coupled NDT & E purposes the lowest zero-order antisymmetric Lamb wave mode A0 is used, because ...
Rymantas J. Kazys, Almantas Vilpisauskas, Justina Sestoke   +2 more
doaj   +1 more source

Explore Ultrasonic-Induced Mechanoluminescent Solutions towards Realising Remote Structural Health Monitoring

Sensors
Ultrasonic guided waves, which are often generated and detected by piezoelectric transducers, are well established to monitor engineering structures. Wireless solutions are sought to eliminate cumbersome wire installation. This work proposes a method for
Marilyne Philibert, Kui Yao
doaj   +1 more source

Sparse-TFM Imaging of Lamb Waves for the Near-Distance Defects in Plate-Like Structures

Metals, 2019
The ultrasonic phased array total focusing method (TFM) has the advantages of high imaging resolution and high sensitivity to small defects. However, it has a long imaging time and cannot realize near-distance defect imaging, which limits its application
Haiyan Zhang, Yaqun Liu, Guopeng Fan, Hui Zhang, Wenfa Zhu, Qi Zhu   +5 more
doaj   +1 more source

Material Characterization of Fiber-Reinforced Composites Using Air Coupled Ultrasonic Polar Scans

Research and Review Journal of Nondestructive Testing
The widespread use of fiber-reinforced composites is partly due to their high weight-specific mechanical properties. Due to their complex structure, however, there are high demands on quality assurance.
Julian Würthner, Marc Kreutzbruck
doaj   +1 more source

Plenary Abstracts Session & Oral Presentations

HemaSphere, Volume 10, Issue S1, June 2026.
wiley   +1 more source

Poster Sessions

HemaSphere, Volume 10, Issue S1, June 2026.
wiley   +1 more source