Results 31 to 40 of about 98,820 (198)
Global Winds Shape Planetary‐Scale Lamb Waves
Geophysical Research Letters, 2023 In 2022, the Hunga volcano eruption in Tonga generated atmospheric pressure waves that propagated globally and produced tsunamis in all the world's oceans.
Ignacio Sepúlveda +2 more
doaj +1 more source
Application of Nonlinear Lamb Wave Mixing Method for Residual Stress Measurement in Metal Plate
Chinese Journal of Mechanical Engineering, 2023 Harmonic nonlinear ultrasound can offer high sensitivity for residual stress measurements; however, it cannot be used for local stress measurements at a point in space and exhibits nonlinear distortions in the experimental system.
Jingpin Jiao +5 more
doaj +1 more source
Frequency Dependence of Second-Harmonic Generation in Lamb Waves [PDF]
, 2014 The frequency dependence of the second-harmonic generation in Lamb waves is studied theoretically and numerically in order to examine the role of phase matching for sensitive evaluation of material nonlinearity.
Biwa, Shiro, Matsuda, Naoki
core +1 more source
Stimulation of osteoblast differentiation with guided ultrasound waves [PDF]
, 2015 BACKGROUND: Ultrasound induces mechanical vibration and heat, causing differentiation and proliferation in osteoblasts. All known in vitro evaluations of ultrasound are, however, performed with longitudinal ultrasound waves.
Kotha, Shiva +6 more
core +1 more source
Subsonic Lamb waves in anisotropic plates [PDF]
Quarterly of Applied Mathematics, 2002 A six-dimensional complex formalism for analysis of Lamb waves propagating with subsonic speed in anisotropic plates is formulated. Conditions for nonexistence of certain Lamb waves in anisotropic plates are obtained. An example of a transversely isotropic plate having “forbidden” speed at which no subsonic Lamb wave propagates is presented.
openaire +1 more source
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
A Lamb wave lens for acoustic microscopy [PDF]
IEEE Transactions on Ultrasonics, Ferroelectrics and Frequency Control, 1992 In a conventional scanning acoustic microscope the excited leaky modes contribute significantly to the high contrast obtained in the images. However, all such modes exist simultaneously, and the interpretation of the images is not straightforward, especially in layered media.
Atalar, A., Koymen H., Degertekin F.L.
openaire +4 more sources
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
Electronics Letters, 1987 A graphic sensor based on the measurement of the propagation time of an acoustic wave train is described. Lamb waves are launched in a plate of ordinary glass by piezoelectric bars bonded to the edges of the plate. They are detected at their arrival under the tip of the drawing pencil by a small piezoelectric disc placed in the pencil body.
E. Dieulesaint +3 more
openaire +1 more source
Quasi Two-dimensional Transfer of Elastic Waves
, 2001 A theory for multiple scattering of elastic waves is presented in a random medium bounded by two ideal free surfaces, whose horizontal size is infinite and whose transverse size is smaller than the mean free path of the waves.
A. Fick +32 more
core +2 more sources