Results 61 to 70 of about 719,448 (140)

Scanning laser techniques for characterisation of different surface breaking defect geometries [PDF]

, 2012
Measurements using a laser scanning system consisting of a pulsed Nd:YAG laser to generate surface ultrasonic waves and an interferometer to detect the surface displacement, are presented for different samples and defect geometries.
Edwards, R. S. (Rachel S.), Rosli, M. H., Hernandez-Valle, Francisco, Clough, A. R., Dutton, B. (Ben)   +4 more
core  

Short Note: The ellipticity of Rayleigh waves at infinite depth [PDF]

Geofísica Internacional, 2008
I present an analytical formula and an approximation for the ellipticity of Rayleigh waves in a homogeneous half-space at infinite depth in terms of Poisson’s ratio. The result is compared with the corresponding formulas for surface ellipticity.
P. Malischewsky Auning
doaj  

Soft Mango Firmness Assessment Based on Rayleigh Waves Generated by a Laser-Induced Plasma Shock Wave Technique. [PDF]

Foods, 2021
Arai N, Miyake M, Yamamoto K, Kajiwara I, Hosoya N.   +4 more
europepmc   +1 more source

Magneto-thermoelastic surface waves phenomenon with voids, gravity, initial stress, and rotation under four theories

Alexandria Engineering Journal
This paper addresses a significant research gap in the study of surface waves propagation in a nonhomogeneous, within a magneto-thermoviscoelastic material of higher order, initial stress, rotation, gravity effects and voids.
S.M. Abo-Dahab, F.S. Bayones, F.M. Alharbi, A.M. Abd-Alla, A.F. Aljohani, A.A. Kilany   +5 more
doaj   +1 more source

Non-Contact Inspection of Railhead via Laser-Generated Rayleigh Waves and an Enhanced Matching Pursuit to Assist Detection of Surface and Subsurface Defects. [PDF]

Sensors (Basel), 2021
Ghafoor I, Tse PW, Rostami J, Ng KM.
europepmc   +1 more source

Note on the Rayleigh waves properties in viscoelastic media

Archives of Mechanics
This paper describes a theory for surface Rayleigh waves propagating in a viscoelastic medium. The Zener model to describe the viscoelastic behavior of the medium is used. This simple model captures both the relaxation and retardation.
J.Y. Le Pommellec, A. El Baroudi
doaj   +1 more source

Moving load on elastic structures: Passage through the wave speed barriers [PDF]

, 2010
This thesis was submitted for the degree of Doctor of Philosophy and awarded by Brunel University.The asymptotic behaviour of an elastically supported infinite string and an elastic isotropic half plane (in frames of specific asymptotic model) under a ...
Voloshin, Vitaly
core   +3 more sources

Study of high-resolution analysis of Rayleigh waves on the basis of the Choi–Williams distribution

Frontiers in Earth Science
Rayleigh wave exploration is widely used in the field of engineering investigation, which can analyze the near surface velocity structure. However, the traditional Rayleigh wave exploration data processing method can only provide the average change of ...
Min Xiang, Min Xiang, Xuhui Zhang, Xuhui Zhang, Yuxuan Wei, Xiaoyong Yao, Xiaoyong Yao   +6 more
doaj   +1 more source

Surface defect characterisation using non-contact ultrasound [PDF]

Electromagnetic acoustic transducers (EMATs) have been used as a non-contact ultrasound approach for detecting and characterising surface defects in aluminium bars and billet.
Rosli, M. H.
core  

Attenuation and velocity structure in the area of Pozzuoli-Solfatara (Campi Flegrei, Italy) for the estimate of local site response [PDF]

, 2006
In the present work I infer the 1D shear-wave velocity model in the volcanic area of Pozzuoli-Solfatara using the dispersion properties of both Rayleigh waves generated by artificial explosions and microtremor.
Petrosino, S., Petrosino, Simona
core   +1 more source