On the repulsion effect of coupled Lamb Wave modes

  • Lamb waves, recognized for their significance in material characterisation, structural health monitoring, and non-destructive testing, exhibit complex behaviours that are crucial for industrial applications. 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 mathematical framework and a physical analogy with simple harmonic oscillators, the paper elucidates the underlying 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 monitoring, and non-destructive testing, exhibit complex behaviours that are crucial for industrial applications. 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 mathematical framework and a physical analogy with simple harmonic oscillators, the paper elucidates the underlying 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 evaluation techniques.zeige mehrzeige weniger

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Autor*innen:Marcel Nicolai
Koautor*innen:Jannis Bulling, Yevgeniya Lugovtsova, Jens Prager, Henning Zeipert, Bernd Henning
Dokumenttyp:Vortrag
Veröffentlichungsform:Präsentation
Sprache:Englisch
Jahr der Erstveröffentlichung:2024
Organisationseinheit der BAM:8 Zerstörungsfreie Prüfung
8 Zerstörungsfreie Prüfung / 8.4 Akustische und elektromagnetische Verfahren
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, Netherlands
Beginndatum der Veranstaltung:08.07.2024
Enddatum der Veranstaltung:11.07.2024
Verfügbarkeit des Dokuments:Datei im Netzwerk der BAM verfügbar ("Closed Access")
Datum der Freischaltung:03.04.2025
Referierte Publikation:Nein
Eingeladener Vortrag (wissenschaftliche Konferenzen):Nein
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