Mode conversion relation for elastic waves scattered by a cylindrical obstacle in a solid

1974 ◽  
Vol 56 (6) ◽  
pp. 1899-1901 ◽  
Author(s):  
Timothy S. Lewis ◽  
David W. Kraft
Keyword(s):  
Elastic Waves ◽  
Mode Conversion ◽  
Cylindrical Obstacle

One-way transmission and mode conversion of elastic waves by a hybrid phononic crystal structure

2019 ◽  
Vol 125 (21) ◽  
pp. 215101 ◽  
Author(s):  
Ji-En Wu ◽  
Ruixia Hu ◽  
Bing Tang ◽  
Xiaoyun Wang ◽  
Han Jia ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Elastic Waves ◽  
Mode Conversion ◽  
Phononic Crystal

scholarly journals Mode Conversion and Energy Transmission Ratio of Elastic Waves

2010 ◽  
Vol 20 (3) ◽  
pp. 296-307 ◽  
Author(s):  
Tae-Eon Kim ◽  
Han-Yong Chun ◽  
Jin-Oh Kim ◽  
Joon-Kwan Park
Keyword(s):  
Elastic Waves ◽  
Mode Conversion ◽  
Transmission Ratio ◽  
Energy Transmission

Localization and mode conversion for elastic waves in randomly layered media II

Wave Motion ◽  
1996 ◽  
Vol 23 (2) ◽  
pp. 181-201 ◽  
Author(s):  
W. Kohler ◽  
G. Papanicolaou ◽  
B. White
Keyword(s):  
Elastic Waves ◽  
Mode Conversion ◽  
Layered Media

Localization and mode conversion for elastic waves in randomly layered media I

Wave Motion ◽  
1996 ◽  
Vol 23 (1) ◽  
pp. 1-22 ◽  
Author(s):  
W. Kohler ◽  
G. Papanicolaou ◽  
B. White
Keyword(s):  
Elastic Waves ◽  
Mode Conversion ◽  
Layered Media

Propagation of elastic waves through polycrystals: the effects of scattering from dislocation arrays

2006 ◽  
Vol 462 (2073) ◽  
pp. 2607-2623 ◽  
Author(s):  
Agnès Maurel ◽  
Vincent Pagneux ◽  
Denis Boyer ◽  
Fernando Lund
Keyword(s):  
Grain Boundaries ◽  
Elastic Waves ◽  
Mode Conversion ◽  
Mass Operator ◽  
Index Of Refraction ◽  
Attenuation Length ◽  
Coherent Wave ◽  
Dislocation Arrays ◽  
Propagation Of Elastic Waves ◽  
Distribution Of Dislocations

We address the problem of an elastic wave coherently propagating through a two-dimensional polycrystal. The main source of scattering is taken to be the interaction with grain boundaries that are in turn modelled as line distribution of dislocations—a good approximation for low angle grain boundaries. First, the scattering due to a single linear array is worked out in detail in a Born approximation, both for longitudinal and transverse polarization and allowing for mode conversion. Next, the polycrystal is modelled as a continuum medium filled with such lines that are in turn assumed to be randomly distributed. The properties of the coherent wave are worked out in a multiple scattering formalism, with the calculation of a mass operator, the main technical ingredient. Expansion of this operator to second-order in perturbation theory gives expressions for the index of refraction and attenuation length. This work is motivated by two sources of recent experiments: firstly, the experiments of Zhang et al . (Zhang, G., Simpson Jr, W. A., Vitek, J. M., Barnard, D. J., Tweed, L. J. & Foley J. 2004 J. Acoust. Soc. Am. 116 , 109–116.) suggesting that current understanding of wave propagation in polycrystalline material fails to interpret experimental results; secondly, the experiments of Zolotoyabko & Shilo who show that dislocations are potentially strong scatterers for elastic waves.

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