Dokument-ID Dokumenttyp Autoren/innen Persönliche Herausgeber/innen Haupttitel Abstract Auflage Verlagsort Verlag Herausgeber (Institution) Erscheinungsjahr Titel des übergeordneten Werkes Jahrgang/Band ISBN Veranstaltung Veranstaltungsort Beginndatum der Veranstaltung Enddatum der Veranstaltung Ausgabe/Heft Erste Seite Letzte Seite URN DOI Lizenz Datum der Freischaltung OPUS4-51986 Beitrag zu einem Tagungsband Bulling, Jannis; Franosch, Georg; Lugovtsova, Yevgeniya; Prager, Jens Rizzo, P.; Milazzo, A. Sensitivity of Ultrasonic Guided Waves to Elastic Constants: A Numerical Study The dispersive properties of Lamb waves can be utilised for material characterisation because the frequency-wavenumber-relationship, as well as the group velocity, depend on material parameters. These dependencies make a non-destructive estimation of an elastic constant possible. This preliminary study investigates the sensitivity of dispersion curves caused by a change in elastic constants. The Scaled Boundary Finite Element Method is used to compute special dispersion curves, which show the sensitivity value of the frequency and group velocity as a colour value. This representation allows for easy identification of patterns and local effects. Two sets of dispersion curves are presented, one set for a steel plate and the other set for a plate made of a carbon fibre reinforced polymer. In general, we notice that the sensitivity often increases with the frequency and that higher-order modes seem to be more suitable for material characterisation. Moreover, specific modes respond to material changes while others are relatively unaffected, which must be taken into consideration for material characterisation. Cham Springer 2021 Lecture Notes in Civil Engineering 127 978-3-030-64593-9 European Workshop on Structural Health Monitoring (EWSHM 2020) Online meeting 06.07.2020 09.07.2020 759 768 10.1007/978-3-030-64594-6_73 2021-01-13