TY  - CONF
A1  - Nicolai, Marcel
T1  - On the repulsion effect of coupled Lamb Wave modes
N2  - 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 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.
T2  - ICSV 2024
CY  - Amsterdam, Netherlands
DA  - 08.07.2024
KW  - Lamb waves
KW  - Mode repulsion
KW  - Scaled Boundary Finite Element Method (SBFEM)
KW  - Mechanical coupling
KW  - Dispersion curves
PY  - 2024
AN  - OPUS4-62857
LA  - eng
AD  - Bundesanstalt fuer Materialforschung und -pruefung (BAM), Berlin, Germany
ER  -