A Near Surface Defect-Induced Lattice Distortion

Kapelewski, J.

doi:10.1080/10589759208952730

Cited by 1 publication

(3 citation statements)

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“…Following the model treatment, developed by us for a modified material surface (Kapelewski, 1991) for the upper component (2) (z > 0), we obtain:…”

Section: Description Of the Model Treatmentmentioning

confidence: 99%

“…The SW scattered wave can than be written in the following form (Kapelewski, 1991;Kapelewski, Pasternak, 1996):…”

Section: Description Of the Model Treatmentmentioning

confidence: 99%

“…We shall not dwell here on the merit of the method over more conventional electronically controlled 2D antenna arrays, which was thoroughly discussed elsewhere (Kapelewski, Pasternak, 1996;1999;Kapelewski, 1991). In this paper we consider an analogous problem for the case when the array of altered phase clusters (as before (Angel, Achenbach, 1985;Claus, 1978) modelled by dipole-force dilation centers distribution in the host region) is situated at the interface between two (similar or identical but differently oriented) solids, and the excitation is provided by the SW propagating along the perturbed interface plane.…”

Section: Introductionmentioning

confidence: 99%

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Elastic Wave Behaviour in 2-D Acoustic Interface Superlattices of an Altered Phase

Kapelewski¹,

Lila²

2011

Archives of Acoustics

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The purpose of the paper is to outline a systematic and unified non-local treatment of mode conversion effects associated with an interface superlattice being a 2D pseudo-array composed of altered phase inclusions (exemplified by impurity clusters) and located at a solid-solid plane interface. It will be illustrated, in some detail, for the instructive case of a Stoneley type acoustic wave (SW), incident on a periodically nonhomogeneous portion of an interface and partly transformed into bulk modes propagating in one of the component solid. An analytical model scheme is constructed, using a variational method combined with the T matrix approach, appropriate for the 2D periodic array treated, and decaying into the depth of this solid for the structure in a way determined by the array geometry and element 3D profiles as well as the boundary conditions at the interface. An apodization (weighting) to reduce the side-lobes level is incorporated into the structure by appropriately varying lateral dimensions and the depth of particular scatterers.

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“…Following the model treatment, developed by us for a modified material surface (Kapelewski, 1991) for the upper component (2) (z > 0), we obtain:…”

Section: Description Of the Model Treatmentmentioning

confidence: 99%

“…The SW scattered wave can than be written in the following form (Kapelewski, 1991;Kapelewski, Pasternak, 1996):…”

Section: Description Of the Model Treatmentmentioning

confidence: 99%