Direction-dependent elastic wave scattering and mode coupling in elastic plates

S. D. Parker; M. R. Haberman

doi:10.1117/12.3012634

9 May 2024 Direction-dependent elastic wave scattering and mode coupling in elastic plates

S. D. Parker, M. R. Haberman

Proceedings Volume 12951, Health Monitoring of Structural and Biological Systems XVIII; 129510W (2024) https://doi.org/10.1117/12.3012634
Event: SPIE Smart Structures + Nondestructive Evaluation, 2024, Long Beach, California, United States

Abstract

Asymmetric scattering is a phenomenon in which the field scattered from a discontinuity is dependent on the direction of incidence. In waveguide systems such as elastic plates, the existence of multiple propagating modes provides a platform to explore asymmetric scattering through direction-dependent mode coupling. In this talk, we first derive requirements for asymmetric scattering due to reciprocity and passivity in multi-mode systems. These principles are used in the design and modeling of an elastic beam containing a Willis scatterer which produces asymmetric coupling of symmetric and antisymmetric Lamb modes. Discrepancies between Euler-Bernoulli and Timoshenko beam modeling approaches are discussed.

Conference Presentation

(2024) Published by SPIE. Downloading of the abstract is permitted for personal use only.

Citation Download Citation

S. D. Parker and M. R. Haberman "Direction-dependent elastic wave scattering and mode coupling in elastic plates", Proc. SPIE 12951, Health Monitoring of Structural and Biological Systems XVIII, 129510W (9 May 2024); https://doi.org/10.1117/12.3012634

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