Verification of ultrasonic field modeling by visualization of wave propagation in solids
- When dealing in ultrasonic testing with inhomogeneous and anisotropic material structure such as diverse types of components made from austenitic or nickel based cast, which are currently used for modern power plant concepts, data interpretation is quite difficult. For better understanding of the complex interaction between the sound field and the component under test, the mathematical modeling of sound propagation in solids is a substantial task to increase the probability of detection of relevant defects. First we present a mathematical approach for modeling the three dimensional transient particle displacement as a function of time in each point in a half space excited by an impulsive point load at the surface. The transient ultrasonic field of a rectangular array element is calculated with this approach by a point source synthesis. Based on this solution we model the wave propagation of a phased array transducer by time delayed superposition of the wave field of the transducerWhen dealing in ultrasonic testing with inhomogeneous and anisotropic material structure such as diverse types of components made from austenitic or nickel based cast, which are currently used for modern power plant concepts, data interpretation is quite difficult. For better understanding of the complex interaction between the sound field and the component under test, the mathematical modeling of sound propagation in solids is a substantial task to increase the probability of detection of relevant defects. First we present a mathematical approach for modeling the three dimensional transient particle displacement as a function of time in each point in a half space excited by an impulsive point load at the surface. The transient ultrasonic field of a rectangular array element is calculated with this approach by a point source synthesis. Based on this solution we model the wave propagation of a phased array transducer by time delayed superposition of the wave field of the transducer elements. Next we use an electrodynamic technique to visualize the grazing sound field at the surface of a test block radiated by a phased array probe. By detecting the grazing beam at the samples surface with a small electrodynamic probe, we measured the particle displacement as a function of time. It allows for measuring the displacement in all three spatial directions. This comprises the detection of the horizontal and vertical particle displacement with respect to the surface and thus also the detection of longitudinal and shear waves is possible. The calculated and measured wave fields will be compared for different delay laws in isotropic and transversely isotropic media. The results support the theoretical activities to model the wave propagation and to find optimal testing parameters for different components and configurations.…
Autor*innen: | Uwe Völz, Marc Kreutzbruck, Thomas Heckel, Heinz Mrasek |
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Dokumenttyp: | Beitrag zu einem Tagungsband |
Veröffentlichungsform: | Verlagsliteratur |
Sprache: | Englisch |
Titel des übergeordneten Werkes (Englisch): | 8th International conference on NDE in relation to structural integrity for nuclear and pressurised components (DGZfP-Proceedings) |
Jahr der Erstveröffentlichung: | 2010 |
Herausgeber (Institution): | Deutsche Gesellschaft für Zerstörungsfreie Prüfung (DGZfP) |
Verlagsort: | Berlin |
Ausgabe/Heft: | DGZfP-BB 125 (Th.4.A.2) |
Erste Seite: | 1 |
Letzte Seite: | 7 |
Freie Schlagwörter: | Modeling; Phased array; Sound field; Visualization; Wave propagation |
Veranstaltung: | 8th International conference on NDE in relation to structural integrity for nuclear and pressurised components |
Veranstaltungsort: | Berlin, Germany |
Beginndatum der Veranstaltung: | 2010-09-29 |
Enddatum der Veranstaltung: | 2010-10-01 |
ISBN: | 978-3-940283-30-6 |
Verfügbarkeit des Dokuments: | Physisches Exemplar in der Bibliothek der BAM vorhanden ("Hardcopy Access") |
Bibliotheksstandort: | Sonderstandort: Publica-Schrank |
Datum der Freischaltung: | 19.02.2016 |
Referierte Publikation: | Nein |