Nearly cloaking for the elasticity system with residual stress

Article type: Research Article

Authors: Lin, Yi-Hsuan^{a; b}

Affiliations: [a] Institute for Advanced Study, Jockey Club, HKUST, Hong Kong. E-mail: [email protected] | [b] Department of Mathematics, University of Washington, USA

Abstract: The nearly cloaking via transformation optics approach for the isotropic elastic wave fields is considered. This work extends the study of the nearly cloaking scheme to the elasticity system with residual stress in RN for N=2,3, which is an anisotropic elasticity system. It is worth mentioning that there are no minor symmetric properties for the elastic tensor with residual stress and this system is invariant under a coordinate transformation. Therefore, we think the elasticity system residual stress model is more natural than the isotropic elasticity system in designing the elastic cloaking medium in the physical sense. In addition, the main difficulty of treating this problem lies in the fact that there are no layer potential theory for the residual stress system. Instead, we will derive suitable elliptic estimates for the elasticity system residual stress by comparing with the Lamé system to achieve desired results.

Keywords: Elastic cloaking, nearly cloaking, anisotropic elasticity system, residual stress

DOI: 10.3233/ASY-171439

Journal: Asymptotic Analysis, vol. 106, no. 1, pp. 1-23, 2018