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Quarterly of Applied Mathematics

Quarterly of Applied Mathematics

Online ISSN 1552-4485; Print ISSN 0033-569X

   
 
 

 

Singularities of the stress concentration in the presence of $C^{1,\alpha }$-inclusions with core-shell geometry


Authors: Xia Hao and Zhiwen Zhao
Journal: Quart. Appl. Math. 81 (2023), 203-243
MSC (2020): Primary 78A48, 35Q74; Secondary 35B44, 35C20, 35J25
DOI: https://doi.org/10.1090/qam/1634
Published electronically: September 28, 2022
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Abstract: In high-contrast composites, if an inclusion is in close proximity to the matrix boundary, then the stress, which is represented by the gradient of a solution to the Lamé systems of linear elasticity, may exhibit the singularities with respect to the distance $\varepsilon$ between them. In this paper, we establish the asymptotic formulas of the stress concentration for core-shell geometry with $C^{1,\alpha }$ boundaries in all dimensions by precisely capturing all the blow-up factor matrices, as the distance $\varepsilon$ between interfacial boundaries of a core and a surrounding shell goes to zero. Further, a direct application of these blow-up factor matrices gives the optimal gradient estimates.


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Additional Information

Xia Hao
Affiliation: Department of Mathematics Science, Hebei Normal University, Shijiazhuang, Hebei 050024, People’s Republic of China
ORCID: 0000-0003-1911-5118
Email: xiahao0915@163.com

Zhiwen Zhao
Affiliation: Beijing Computational Science Research Center, Beijing 100193, People’s Republic of China
ORCID: 0000-0002-9708-1198
Email: zwzhao365@163.com

Received by editor(s): August 3, 2022
Received by editor(s) in revised form: September 4, 2022
Published electronically: September 28, 2022
Additional Notes: Zhiwen Zhao is the corresponding author. The second author was partially supported by CPSF (2021M700358).
Article copyright: © Copyright 2022 Brown University