Results 91 to 100 of about 11,411 (229)
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
doaj +1 more source
Structural Health Monitoring of Large Structures Using Acoustic Emission-Case Histories [PDF]
, 2019 Acoustic emission (AE) techniques have successfully been used for assuring the structural integrity of large rocket motorcases since 1963 [...
Ono, Kanji
core +1 more source
Journal of Systematics and Evolution, Volume 63, Issue 6, Page 1501-1518, November 2025.Investigating the systematics and biogeography of Neotropical catfishes of the genus Rhamdia refined phylogenetic hypotheses, including deep paraphyly of Rhamdia laticauda, supported northward dispersal catalyzed by emergence of the Panamanian Isthmus and imply that cave colonization is widespread, convergent, and recent, with established cave‐dwelling
Jairo Arroyave +6 more
wiley +1 more source
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
Continuous debonding monitoring of a patch repaired helicopter stabilizer: damage assessment and analysis [PDF]
, 2015 The present work focuses on the structural health monitoring of an aluminium vertical helicopter stabiliser with a pre-introduced crack which was repaired with an adhesively bonded composite patch.
Grammatikos, S.A. +6 more
core +1 more source
Damage detection in a composite wind turbine blade using 3D scanning laser vibrometry [PDF]
, 2016 As worldwide wind energy generation capacity grows, there is an increasing demand to ensure structural integrity of the turbine blades to maintain efficient and safe energy generation.
Armstrong, J. +4 more
core +1 more source
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
doaj +1 more source
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 +2 more
doaj +1 more source