On near-cloaking for linear elasticity
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Published version
Author(s)
Craster, Richard
Diatta, André
Guenneau, Sébastien
Hutridurga, Harsha
Type
Journal Article
Abstract
We make precise some results on the cloaking of displacement fields in linear elasticity. In the spirit of transformation media theory, the transformed governing equations in Cosserat
and Willis frameworks are shown to be equivalent to certain high-contrast small defect problems for
the usual Navier equations. We discuss near-cloaking for elasticity systems via a regularized transform and perform numerical experiments to illustrate our near-cloaking results. We also study the
sharpness of the estimates from [H. Ammari, H. Kang, K. Kim, and H. Lee, J. Differential Equations,
254 (2013), pp. 4446--4464], wherein the convergence of the solutions to the transmission problems is
investigated, when the Lam\'e parameters in the inclusion tend to extreme values. Both soft and hard
inclusion limits are studied and we also touch upon the finite frequency case. Finally, we propose an
approximate isotropic cloak algorithm for a symmetrized Cosserat cloak.
and Willis frameworks are shown to be equivalent to certain high-contrast small defect problems for
the usual Navier equations. We discuss near-cloaking for elasticity systems via a regularized transform and perform numerical experiments to illustrate our near-cloaking results. We also study the
sharpness of the estimates from [H. Ammari, H. Kang, K. Kim, and H. Lee, J. Differential Equations,
254 (2013), pp. 4446--4464], wherein the convergence of the solutions to the transmission problems is
investigated, when the Lam\'e parameters in the inclusion tend to extreme values. Both soft and hard
inclusion limits are studied and we also touch upon the finite frequency case. Finally, we propose an
approximate isotropic cloak algorithm for a symmetrized Cosserat cloak.
Date Issued
2021-01
Date Acceptance
2020-12-30
Citation
Multiscale Modeling & Simulation, 2021, 19 (2), pp.633-664
ISSN
1540-3459
Publisher
Society for Industrial & Applied Mathematics (SIAM)
Start Page
633
End Page
664
Journal / Book Title
Multiscale Modeling & Simulation
Volume
19
Issue
2
Copyright Statement
© 2021, Society for Industrial and Applied Mathematics
Sponsor
Engineering & Physical Science Research Council (EPSRC)
The Leverhulme Trust
Identifier
https://epubs.siam.org/doi/10.1137/20M1333201
Grant Number
EP/L024926/1
RF-2017-017/9
Subjects
Applied Mathematics
0102 Applied Mathematics
Publication Status
Published
Date Publish Online
2021-04-13