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Plane Dyadic Wave Scattering by a Small Rigid Body and Cavity in 3D Linear Elasticity
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Plane Dyadic Wave Scattering by a Small Rigid Body and Cavity in 3D Linear Elasticity
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Journal Article
Plane Dyadic Wave Scattering by a Small Rigid Body and Cavity in 3D Linear Elasticity
2025
Overview
In this paper, we study the 3D elastic scattering problem of plane dyadic waves for a rigid body and a cavity in linear elasticity. Initially, for each case, we formulate the direct scattering problem in a dyadic form, and we give the corresponding longitudinal and transverse far-field scattering amplitudes. Due to dyadic formulation of the problems, the main outcome of this paper is to establish the necessary energy considerations as well as to present functionals and formulas for the differential and the scattering cross-section in order to measure the disturbance created by the scatterer to the propagation of the plane dyadic incident field. Further, we assume that our incident field is scattered by a “small” rigid body or cavity and relative results for low-frequency scattering are obtained. Finally, we prove similar corresponding expressions for energy functionals in the far-field region, along with expressions for the differential and the total scattering cross-section, which are recovered as special cases.
Publisher
MDPI AG
Subject
