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Communications in Computational Physics Communications in Computational Physics

Article contents

Numerical Analysis of Inverse Elasticity Problemwith Signorini's Condition

Part of: Special kinds of problems Numerical methods Partial differential equations, boundary value problems Partial differential equations, initial value and time-dependent initial-boundary value problems

Published online by Cambridge University Press:  05 October 2016

Cong Zheng ,
Xiaoliang Cheng  and
Kewei Liang
Cong Zheng
Affiliation:
School of Mathematical Sciences, Zhejiang University, Hangzhou 310027, P.R. China
Xiaoliang Cheng
Affiliation:
School of Mathematical Sciences, Zhejiang University, Hangzhou 310027, P.R. China
Kewei Liang
Affiliation:
School of Mathematical Sciences, Zhejiang University, Hangzhou 310027, P.R. China
Corresponding
E-mail address:
congzheng@zju.edu.cn
xiaoliangcheng@zju.edu.cn
matlkw@zju.edu.cn
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Abstract

An optimal control problem is considered to find a stable surface traction, which minimizes the discrepancy between a given displacement field and its estimation. Firstly, the inverse elastic problem is constructed by variational inequalities, and a stable approximation of surface traction is obtained with Tikhonov regularization. Then a finite element discretization of the inverse elastic problem is analyzed. Moreover, the error estimation of the numerical solutions is deduced. Finally, a numerical algorithm is detailed and three examples in two-dimensional case illustrate the efficiency of the algorithm.

Keywords

Optimal control variational inequality inverse elastic problem finite element error estimates numerical simulations

MSC classification

Secondary: 65M15: Error bounds 65N21: Inverse problems 65N22: Solution of discretized equations 74M15: Contact 74S05: Finite element methods
Type
Research Article
Information
Communications in Computational Physics , Volume 20 , Issue 4 , October 2016 , pp. 1045 - 1070
Copyright
Copyright © Global-Science Press 2016 

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