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Quarterly of Applied Mathematics

Quarterly of Applied Mathematics

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

   
 
 

 

Upper and lower bounds for stress concentration in linear elasticity when $C^{1, \alpha }$ inclusions are close to boundary


Authors: Yu Chen, Xia Hao and Longjuan Xu
Journal: Quart. Appl. Math. 80 (2022), 607-639
MSC (2020): Primary 35J47, 35B44, 35J25
DOI: https://doi.org/10.1090/qam/1621
Published electronically: March 21, 2022
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Abstract | References | Similar Articles | Additional Information

Abstract: We establish boundary gradient estimates for both Lamé systems with partially infinite coefficients and perfect conductivity problem. The inclusion and the matrix domain are both assumed to be of $C^{1, \alpha }$, weaker than $C^{2, \alpha }$ assumptions in the previous work by Bao-Ju-Li [Adv. Math. 314 (2017), pp. 583–629]. When the inclusion is located close to the boundary of matrix domain, we give the specific examples of boundary data to obtain the lower bound gradient estimates in all dimensions, which guarantee the blow-up occurs and indicate that the blow-up rates of the gradients with respect to the distance between the interfacial surfaces are optimal.


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Additional Information

Yu Chen
Affiliation: Department of Mathematics, Northeastern University, Shenyang 110819, People’s Republic of China.
Email: chenyu@amss.ac.cn.

Xia Hao
Affiliation: School of Mathematical Sciences, Beijing Normal University, Laboratory of Mathematics and Complex Systems, Ministry of Education, Beijing 100875, People’s Republic of China
ORCID: 0000-0003-1911-5118
Email: haoxia@mail.bnu.edu.cn.

Longjuan Xu
Affiliation: Department of Mathematics, National University of Singapore, 10 Lower Kent Ridge Road, Singapore 119076.
MR Author ID: 1225839
ORCID: 0000-0002-6445-7734
Email: ljxu311@163.com

Received by editor(s): September 21, 2021
Received by editor(s) in revised form: February 9, 2022
Published electronically: March 21, 2022
Additional Notes: The first author was partially supported by NSF in China No. 11901036 and PSF in China No. 2018M631369.
The authors were partially supported by NSF in China No. 11631002, 11971061, and Beijing NSF No. 1202013.
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