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Nonlinear surface acoustic waves: Theory

  • A theoretical description is given for the propagation of surface acoustic wave pulses in anisotropic elastic media subject to the influence of nonlinearity. On the basis of nonlinear elasticity theory, an evolution equation is presented for the surface slope or the longitudinal surface velocity associated with an acoustic pulse. It contains a non-local nonlinearity, characterized by a kernel thatA theoretical description is given for the propagation of surface acoustic wave pulses in anisotropic elastic media subject to the influence of nonlinearity. On the basis of nonlinear elasticity theory, an evolution equation is presented for the surface slope or the longitudinal surface velocity associated with an acoustic pulse. It contains a non-local nonlinearity, characterized by a kernel that strongly varies from one propagation geometry to another due to the anisotropy of the substrate. It governs pulse shape evolution in homogeneous halfspaces and the shapes of solitary surface pulses that exist in coated substrates. The theory describing nonlinear Rayleigh-type surface acoustic waves is extended in a straightforward way to surface waves that are localized at a one-dimensional acoustic waveguide like elastic wedges.show moreshow less

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Metadaten
Author:Andreas MayerGND
Publisher:Elsevier
Date of Publication (online):2008/06/20
Language:English
GND Keyword:Akustik; Oberfläche; Welle
Parent Title (English):Ultrasonics : Selected Papers from ICU 2007
Volume:48
Issue:6/7
ISSN:0041-624X
First Page:478
Last Page:481
Document Type:Conference Proceeding
Institutes:Bibliografie
Open Access:Zugriffsbeschränkt
Release Date:2019/10/22
Licence (German):License LogoEs gilt das UrhG
Note:
International Congresses on Ultrasonics, Vienna, 2007
DOI:https://doi.org/10.1016/j.ultras.2008.06.009