Imperial College London
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DrFanShi

Faculty of Engineering, Department of Mechanical Engineering

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f.shi12 CV

 
 
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Location

 

City and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Shi:2017:10.1103/PhysRevB.95.214305,
author = {Shi, F and Lowe, M and Craster, R},
doi = {10.1103/PhysRevB.95.214305},
journal = {PHYSICAL REVIEW B},
title = {Diffusely scattered and transmitted elastic waves by random rough solid-solid interfaces using an elastodynamic Kirchhoff approximation},
url = {http://dx.doi.org/10.1103/PhysRevB.95.214305},
volume = {95},
year = {2017}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Elastic waves scattered by random rough interfaces separating two distinct media play an important role in modeling phonon scattering and impact upon thermal transport models, and are also integral to ultrasonic inspection. We introduce theoretical formulas for the diffuse field of elastic waves scattered by, and transmitted across, random rough solid-solid interfaces using the elastodynamic Kirchhoff approximation. The new formulas are validated by comparison with numerical Monte Carlo simulations, for a wide range of roughness (rms σ≤λ/3, correlation length λ0≥ wavelength λ), demonstrating a significant improvement over the widely used small-perturbation approach, which is valid only for surfaces with small rms values. Physical analysis using the theoretical formulas derived here demonstrates that increasing the rms value leads to a considerable change of the scattering patterns for each mode. The roughness has different effects on the reflection and the transmission, with a strong dependence on the material properties. In the special case of a perfect match of the wave speed of the two solid media, the transmission is the same as the case for a flat interface. We pay particular attention to scattering in the specular direction, often used as an observable quantity, in terms of the roughness parameters, showing a peak at an intermediate value of rms; this rms value coincides with that predicted by the Rayleigh parameter.
AU  - Shi,F
AU  - Lowe,M
AU  - Craster,R
DO  - 10.1103/PhysRevB.95.214305
PY  - 2017///
SN  - 2469-9950
TI  - Diffusely scattered and transmitted elastic waves by random rough solid-solid interfaces using an elastodynamic Kirchhoff approximation
T2  - PHYSICAL REVIEW B
UR  - http://dx.doi.org/10.1103/PhysRevB.95.214305
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000403224500002&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/49868
VL  - 95
ER  -
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