DocumentCode :
1052053
Title :
A physical interpretation of elastic guided-wave reflection from normal ends of a waveguide
Author :
Bian, Hongxin ; Rose, Joseph L.
Author_Institution :
Dept. of Eng. Sci. & Mech., Pennsylvania State Univ., University Park, PA, USA
Volume :
51
Issue :
7
fYear :
2004
fDate :
7/1/2004 12:00:00 AM
Firstpage :
838
Lastpage :
847
Abstract :
Studied in this paper are two-dimensional guided wave reflections from normal boundaries in an isotropic elastic media. By making use of the transverse resonance concept, the reflections of the waveguide modes from normal interfaces are interrogated. A general condition is obtained under which the guided waves in an isotropic medium will undergo no mode conversion when interaction occurs with a normal traction free or fixed end. Under some circumstances, similarities are obtained between waveguide modes and bulk-wave modes, for example, doubling of the displacement field at a free end and doubling of the stress field at a fixed end. The results obtained are applicable to all two-dimensional, guided-wave modes, along one waveguide direction with lossless boundaries on the surface(s) parallel to the waveguide direction, including all possible guided-wave modes, propagating and nonpropagating, in plates, one half space, interface of two different half spaces, layers on a half space, multilayer structures, and all axisymmetric modes in cylindrical structures. In addition, the function of displacement potentials is analyzed in the course of guided-wave mode conversion at a normal end.
Keywords :
acoustic wave reflection; plates (structures); surface acoustic waves; waveguide theory; axisymmetric mode; bulk-wave mode; cylindrical structure; displacement field doubling; elastic guided-wave reflection physical interpretation; guided-wave mode conversion; isotropic elastic media; lossless boundaries; multilayer structure; nonpropagating wave; propagating wave; stress field doubling; transverse resonance; two-dimensional guided wave reflections; waveguide mode; Boundary conditions; Finite element methods; Nonhomogeneous media; Propagation losses; Reflection; Resonance; Seismology; Stress; Surface waves; Vibrations;
fLanguage :
English
Journal_Title :
Ultrasonics, Ferroelectrics, and Frequency Control, IEEE Transactions on
Publisher :
ieee
ISSN :
0885-3010
Type :
jour
DOI :
10.1109/TUFFC.2004.1320743
Filename :
1320743
Link To Document :
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