Imperial College London
Portrait Picture

ProfessorMichaelLowe

Faculty of Engineering, Department of Mechanical Engineering

Head of Department of Mechanical Engineering
 
 
 
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Contact

 

+44 (0)20 7594 7000m.lowe Website

 
 
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Assistant

 

Ms Nina Hancock +44 (0)20 7594 7068

 
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Location

 

577DCity and Guilds BuildingSouth Kensington Campus

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Summary

 

Publications

Citation

BibTex format

@article{Haslinger:2019:10.1016/j.jsv.2019.114872,
author = {Haslinger, SG and Lowe, MJS and Huthwaite, P and Craster, R and Shi, F},
doi = {10.1016/j.jsv.2019.114872},
journal = {Journal of Sound and Vibration},
pages = {1--16},
title = {Appraising Kirchhoff approximation theory for the scattering of elastic shear waves by randomly rough defects},
url = {http://dx.doi.org/10.1016/j.jsv.2019.114872},
volume = {460},
year = {2019}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Rapid and accurate methods, based on the Kirchhoff approximation (KA), are developed to evaluate the scattering of shear waves by rough defects and quantify the accuracy of this approximation. Defect roughness has a strong effect on the reflection of ultrasound, and every rough defect has a different surface, so standard methods of assessing the sensitivity of inspection based on smooth defects are necessarily limited. Accurately resolving rough cracks in non-destructive evaluation (NDE) inspections often requires shear waves since they have higher sensitivity to surface roughness than longitudinal waves. KA models are attractive, since they are rapid to deploy, however they are an approximation and it is important to determine the range of validity for the scattering of ultrasonic shear waves; this range is found here. Good agreement between KA and high fidelity finite element simulations is obtained for a range of incident/scattering angles, and the limits of validity for KA are found to be much stricter than for longitudinal wave incidence; as the correlation length of rough surfaces is reduced to the order of the incident shear wavelength, a combination of multiple scattering and surface wave mode conversion leads to KA predictions diverging from those of the true diffuse scattered fields.
AU  - Haslinger,SG
AU  - Lowe,MJS
AU  - Huthwaite,P
AU  - Craster,R
AU  - Shi,F
DO  - 10.1016/j.jsv.2019.114872
EP  - 16
PY  - 2019///
SN  - 0022-460X
SP  - 1
TI  - Appraising Kirchhoff approximation theory for the scattering of elastic shear waves by randomly rough defects
T2  - Journal of Sound and Vibration
UR  - http://dx.doi.org/10.1016/j.jsv.2019.114872
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000485026200005&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - https://www.sciencedirect.com/science/article/pii/S0022460X19304341?via%3Dihub
UR  - http://hdl.handle.net/10044/1/74870
VL  - 460
ER  -
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