Domain decomposition and multiscale mortar mixed finite element methods for linear elasticity with weak stress symmetry
Domain decomposition and multiscale mortar mixed finite element methods for linear elasticity with weak stress symmetry
复制标题
弱应力对称性线弹性的域分解与多尺度砂浆混合有限元法
DOI:
10.1051/m2an/2019057
复制
发表时间:
2019
期刊:
影响因子:
--
通讯作者:
Yotov, Ivan
中科院分区:
文献类型:
--
作者:
Khattatov, Eldar;Yotov, Ivan
Two non-overlapping domain decomposition methods are presented for the mixed finite element formulation of linear elasticity with weakly enforced stress symmetry. The methods utilize either displacement or normal stress Lagrange multiplier to impose interface continuity of normal stress or displacement, respectively. By eliminating the interior subdomain variables, the global problem is reduced to an interface problem, which is then solved by an iterative procedure. The condition number of the resulting algebraic interface problem is analyzed for both methods. A multiscale mortar mixed finite element method for the problem of interest on non-matching multiblock grids is also studied. It uses a coarse scale mortar finite element space on the non-matching interfaces to approximate the trace of the displacement and impose weakly the continuity of normal stress.A priorierror analysis is performed. It is shown that, with appropriate choice of the mortar space, optimal convergence on the fine scale is obtained for the stress, displacement, and rotation, as well as some superconvergence for the displacement. Computational results are presented in confirmation of the theory of all proposed methods.
登录
查看更多内容
影响因子:
2.9
作者:
Ambartsumyan, Ilona;Khattatov, Eldar;Nordbotten, Jan M.;Yotov, Ivan
通讯作者:
Yotov, Ivan
影响因子:
3.9
作者:
Ambartsumyan, Ilona;Khattatov, Eldar;Nordbotten, Jan Martin;Yotov, Ivan
通讯作者:
Yotov, Ivan
DOI:
--
发表时间:
1999
期刊:
影响因子:
--
作者:
A. Klawonn;O. Widlund
通讯作者:
O. Widlund
DOI:
--
发表时间:
2004
期刊:
影响因子:
--
作者:
Achim Fritz;S. Hüeber;B. Wohlmuth
通讯作者:
B. Wohlmuth
DOI:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
H.;Maruyama
通讯作者:
Maruyama