Surface Waves in Anisotropic and Laminated Bodies and Defects Detection / Edition 1

Surface Waves in Anisotropic and Laminated Bodies and Defects Detection / Edition 1

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Springer Netherlands


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Surface Waves in Anisotropic and Laminated Bodies and Defects Detection / Edition 1

Among the variety of wave motions one can single out surface wave pr- agation since these surface waves often adjust the features of the energy transfer in the continuum (system), its deformation and fracture. Predicted by Rayleigh in 1885, surface waves represent waves localized in the vicinity ofextendedboundaries(surfaces)of?uidsorelasticmedia. Intheidealcase of an isotropic elastic half-space while the Rayleigh waves propagate along the surface, the wave amplitude (displacement) in the transverse direction exponentially decays with increasing distance away from the surface. As a resulttheenergyofsurfaceperturbationsislocalizedbytheRayleighwaves within a relatively narrow layer beneath the surface. It is this property of the surface waves that leads to the resonance phenomena that accompany the motion of the perturbation sources (like surface loads) with velocities close to the Rayleigh one; (see e. g. , R. V. Goldstein. Rayleigh waves and resonance phenomena in elastic bodies. Journal of Applied Mathematics and Mechanics (PMM), 1965, v. 29, N 3, pp. 608-619). It is essential to note that resonance phenomena are also inherent to the elastic medium in the case where initially there are no free (unloaded) surfaces. However, they occur as a result of an external action accompanied by the violation of the continuity of certain physical quantities, e. g. , by crack nucleation and dynamic propagation. Note that the aforementioned resonance phenomena are related to the nature of the surface waves as homogeneous solutions (eigenfunctions) of the dynamic elasticity equations for a half-space (i. e. nonzero solutions at vanishing boundary conditions).

Product Details

ISBN-13: 9781402023866
Publisher: Springer Netherlands
Publication date: 11/05/2004
Series: Nato Science Series II: , #163
Edition description: 2004
Pages: 321
Product dimensions: 6.10(w) x 9.17(h) x 0.03(d)

Table of Contents

Foreword. I: Theoretical problems concerning propagation of surface wave in elastic anisotropic media. On the role of anisotropy in crystalloacoustics; V.I. Alshits. Surface waves of non-Rayleigh type; S.V. Kuznetsov. Nonlinearity in elastic surface waves acts nonlocally; D.F. Parker. Explicit secular equations for surface waves in an anisotropic elastic half space from Rayleigh to today; T.C.T. Ting. II: Bending and edge waves in plates and shells. "Nongeometrical phenomena" in propagation of elastic surface waves; V.M. Babich, A.P. Kiselev. Complex rays and internal diffraction at the cusp edge; M. Deschamps, O. Poncelet. Edge waves in the fluid beneath an elastic sheet with linear nonhomogeneity; R.V. Goldstein, A.V. Marchenko. On continuum modelling of wave propagation in layered medium: bending waves; K.B. Ustinov. Edge-localised bending waves in anisotropic media: energy and dispersion; III: Experimental, numerical and semi-analytical methods for analysis of surface waves. Surface electromagnetic perturbations induced by unsteady-state subsurface flow; P.M. Adler, V.M. Entov. Resonant waves in a structured elastic halfspace; M.V. Ayzenberg-Stepanenko. Mumerical analysis of Rayleigh waves in anisotropic media; A.V. Kaptsov. Guided waves in anisotropic media: applications; R.A. Kline. A general purpose computer model for calculating elastic waveguide properties, with application to Non-Destructive Testing; M.J.S. Lowe, P. Cawley, B.N. Pavlakovic. The influence of the initial stresses on the dynamic instability of an anisotropic cone; Y.R. Rossikhin, M.V. Shitikova. Embedding theorem and mutual relation for the interface and shearwavespeeds; I.V. Simonov. IV: Applications of surface waves to analysis of fracture and damage. The non-uniqueness of constant velocity crack propagation; K.B. Broberg. Embedding formulae for planar cracks; R.V. Craster, A.V. Shanin. Wave propagation and crack detection in layered structures; E.V. Glushkov, N.V. Glushkova, A.V. Ekhlakov. Author Index.

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