Imperial College London
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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{Huang:2020:10.1121/10.0002102,
author = {Huang, M and Sha, G and Huthwaite, P and Rokhlin, SI and Lowe, MJS},
doi = {10.1121/10.0002102},
journal = {Journal of the Acoustical Society of America},
pages = {1890--1910},
title = {Maximizing the accuracy of finite element simulation of elastic wave propagation in polycrystals},
url = {http://dx.doi.org/10.1121/10.0002102},
volume = {148},
year = {2020}
}
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RIS format (EndNote, RefMan)

TY  - JOUR
AB  - Three-dimensional finite element (FE) modelling, with representation of materials at grain scale in realistic sample volumes, is capable of accurately describing elastic wave propagation and scattering within polycrystals. A broader and better future use of this FE method requires several important topics to be fully understood, and this work presents studies addressing this aim. The first topic concerns the determination of effective media parameters, namely, scattering induced attenuation and phase velocity, from measured coherent waves. This work evaluates two determination approaches, through-transmission and fitting, and it is found that these approaches are practically equivalent and can thus be used interchangeably. For the second topic of estimating modelling errors and uncertainties, this work performs thorough analytical and numerical studies to estimate those caused by both FE approximations and statistical considerations. It is demonstrated that the errors and uncertainties can be well suppressed by using a proper combination of modelling parameters. For the last topic of incorporating FE model information into theoretical models, this work presents elaborated investigations and shows that to improve agreement between the FE and theoretical models, the symmetry boundary conditions used in FE models need to be considered in the two-point correlation function, which is required by theoretical models.
AU  - Huang,M
AU  - Sha,G
AU  - Huthwaite,P
AU  - Rokhlin,SI
AU  - Lowe,MJS
DO  - 10.1121/10.0002102
EP  - 1910
PY  - 2020///
SN  - 0001-4966
SP  - 1890
TI  - Maximizing the accuracy of finite element simulation of elastic wave propagation in polycrystals
T2  - Journal of the Acoustical Society of America
UR  - http://dx.doi.org/10.1121/10.0002102
UR  - http://gateway.webofknowledge.com/gateway/Gateway.cgi?GWVersion=2&SrcApp=PARTNER_APP&SrcAuth=LinksAMR&KeyUT=WOS:000581764300001&DestLinkType=FullRecord&DestApp=ALL_WOS&UsrCustomerID=1ba7043ffcc86c417c072aa74d649202
UR  - http://hdl.handle.net/10044/1/85865
VL  - 148
ER  -
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