On the repulsion effect of coupled Lamb wave modes
- Lamb waves, recognized for their significance in material characterisation, structural health monitor-ing, and non-destructive testing, exhibit complex behaviours that are crucial for industrial applica-tions. This paper delves into the mathematical and physical principals of the repulsion effect that can be observed in the dispersion curves of coupled Lamb wave modes. This effect is the result from the mechanical coupling of thin-walled solid plates and prevents the crossing of the dispersion curves. The study employs the Scaled Boundary Finite Element Method to calculate the dispersion curves of coupled plates and to simulate their interaction for a weak and ideal coupling. Through a mathemati-cal framework and a physical analogy with simple harmonic oscillators, the paper elucidates the un-derlying principals of this effect. Furthermore, the paper highlights the practical significance of the repulsion effect in Lamb waves, suggesting its application for testing and monitoring theLamb waves, recognized for their significance in material characterisation, structural health monitor-ing, and non-destructive testing, exhibit complex behaviours that are crucial for industrial applica-tions. This paper delves into the mathematical and physical principals of the repulsion effect that can be observed in the dispersion curves of coupled Lamb wave modes. This effect is the result from the mechanical coupling of thin-walled solid plates and prevents the crossing of the dispersion curves. The study employs the Scaled Boundary Finite Element Method to calculate the dispersion curves of coupled plates and to simulate their interaction for a weak and ideal coupling. Through a mathemati-cal framework and a physical analogy with simple harmonic oscillators, the paper elucidates the un-derlying principals of this effect. Furthermore, the paper highlights the practical significance of the repulsion effect in Lamb waves, suggesting its application for testing and monitoring the integrity of multi-layer structures like adhesive bonds, which are important for various industrial applications. A deepened understanding of this effect could contribute to the enhancement of non-destructive evalua-tion techniques.…


| Autor*innen: | Marcel Nicolai, Jannis Bulling, Yevgeniya Lugovtsova, Henning Zeipert, Jens Prager, Bernd Henning |
|---|---|
| Persönliche Herausgeber*innen: | Wim van Keulen, Jim Kok |
| Dokumenttyp: | Beitrag zu einem Tagungsband |
| Veröffentlichungsform: | Graue Literatur |
| Sprache: | Englisch |
| Titel des übergeordneten Werkes (Englisch): | Proceedings of the 30th International Congress on Sound and Vibration |
| Jahr der Erstveröffentlichung: | 2024 |
| Organisationseinheit der BAM: | 8 Zerstörungsfreie Prüfung |
| 8 Zerstörungsfreie Prüfung / 8.4 Akustische und elektromagnetische Verfahren | |
| Verlag: | The International Institute of Acoustics and Vibration (IIAV) |
| Verlagsort: | Amsterdam |
| Erste Seite: | 410 |
| Letzte Seite: | 418 |
| DDC-Klassifikation: | Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Ingenieurwissenschaften und zugeordnete Tätigkeiten |
| Freie Schlagwörter: | Dispersion curves; Lamb waves; Mechanical coupling; Mode repulsion; Scaled Boundary Finite Element Method (SBFEM) |
| Themenfelder/Aktivitätsfelder der BAM: | Material |
| Material / Degradationsmechanismen | |
| Veranstaltung: | ICSV 2024 |
| Veranstaltungsort: | Amsterdam, The Netherlands |
| Beginndatum der Veranstaltung: | 08.07.2024 |
| Enddatum der Veranstaltung: | 11.07.2024 |
| ISSN: | 2329-3675 |
| ISBN: | 978-90-90-39058-1 |
| Verfügbarkeit des Dokuments: | Datei im Netzwerk der BAM verfügbar ("Closed Access") |
| Datum der Freischaltung: | 07.04.2025 |
| Referierte Publikation: | Nein |

