Dokument-ID Dokumenttyp Verfasser/Autoren Herausgeber Haupttitel Abstract Auflage Verlagsort Verlag Erscheinungsjahr Seitenzahl Übergeordneter Titel Übergeordneter Titel Band Schriftenreihe Titel Schriftenreihe Bandzahl ISBN Konferenzname Heftnummer Erste Seite Letzte Seite URN DOI Institute
OPUS4-844 unpublished Sokolova, Elena; Kovalev, Alexander; Maznev, Alexei A. Acoustic waves guided by the intersection of a surface and an interface of two elastic media 2012 5 Wave Motion 49 2 388 393 10.1016/j.wavemoti.2011.12.003 Fakultät Betriebswirtschaft und Wirtschaftsingenieurwesen (B+W)
OPUS4-845 unpublished Sokolova, Elena; Kovalev, Alexander; Timler, Reinhold On the dispersion of wedge acoustic waves 2012 12 Wave Motion 50 2 233 245 10.1016/j.wavemoti.2012.08.015 Fakultät Betriebswirtschaft und Wirtschaftsingenieurwesen (B+W)
OPUS4-699 Referierter Artikel Sokolova, Elena; Kovalev, Alexander; Mayer, Andreas Second-order nonlinearity of wedge acoustic waves in anisotropic media Guided acoustic waves localised at the apex of an infinite elastic wedge are influenced by second-order nonlinearity. This gives rise to a nonlinear term in the integro-differential equation describing waveform evolution at the apex of the wedge. 2012 6 Wave motion : an international journal reporting research on wave phenomena 50 2 246 252 Fakultät Betriebswirtschaft und Wirtschaftsingenieurwesen (B+W)
OPUS4-3302 Teil eines Buches Pupyrev, Pavel Dmitrievich; Lomonosov, Alexey M.; Sokolova, Elena; Kovalev, Alexander; Mayer, Andreas Altenbach, Holm; Pouget, Joël; Rousseau, Martine; Collet, Bernard; Michelitsch, Thomas Nonlinear Acoustic Wedge Waves Among the various types of guided acoustic waves, acoustic wedge waves are non-diffractive and non-dispersive. Both properties make them susceptible to nonlinear effects. Investigations have recently been focused on effects of second-order nonlinearity in connection with anisotropy. The current status of these investigations is reviewed in the context of earlier work on nonlinear properties of two-dimensional guided acoustic waves, in particular surface waves. The role of weak dispersion, leading to solitary waves, is also discussed. For anti-symmetric flexural wedge waves propagating in isotropic media or in anisotropic media with reflection symmetry with respect to the wedge's mid-plane, an evolution equation is derived that accounts for an effective third-order nonlinearity of acoustic wedge waves. For the kernel functions occurring in the nonlinear terms of this equation, expressions in terms of overlap integrals with Laguerre functions are provided, which allow for their quantitative numerical evaluation. First numerical results for the efficiency of third-harmonic generation of flexural wedge waves are presented. Cham Springer 2018 23 Generalized Models and Non-classical Approaches in Complex Materials 2 (Advanced Structured Materials : STRUCTMAT) 90 978-3-319-77503-6 161 184 10.1007/978-3-319-77504-3_8 Fakultät Betriebswirtschaft und Wirtschaftsingenieurwesen (B+W)
OPUS4-4532 Referierter Artikel Pupyrev, Pavel Dmitrievich; Nedospasov, Ilya; Sokolova, Elena; Mayer, Andreas Surface acoustic waves confined to a soft layer between two stiff elastic quarter-spaces Propagation of acoustic waves is considered in a system consisting of two stiff quarter-spaces connected by a planar soft layer. The two quarter-spaces and the layer form a half-space with a planar surface. In a numerical study, surface waves have been found and analyzed in this system with displacements that are localized not only at the surface, but also in the soft layer. In addition to the semi-analytical finite element method, an alternative approach based on an expansion of the displacement field in a double series of Laguerre functions and Legendre polynomials has been applied. It is shown that a number of branches of the mode spectrum can be interpreted and remarkably well described by perturbation theory, where the zero-order modes are the wedge waves guided at a rectangular edge of the stiff quarter-spaces or waves guided at the edge of a soft plate with rigid surfaces. For elastic moduli and densities corresponding to the material combination PMMA-silicone-PMMA, at least one of the branches in the dispersion relation of surface waves trapped in the soft layer exhibits a zero-group velocity point. Potential applications of these 1D guided surface waves in non-destructive evaluation are discussed. ScienceDirect 2021 NaN Wave Motion 101 102672-1 102672-6 10.1016/j.wavemoti.2020.102672 Fakultät Betriebswirtschaft und Wirtschaftsingenieurwesen (B+W)