Least-Squares Mixed Finite Element Formulations for Isotropic and Anisotropic Elasticity at Small and Large Strains
Least-Squares Mixed Finite Element Formulations for Isotropic and Anisotropic Elasticity at Small and Large Strains
复制标题
小应变和大应变下各向同性和各向异性弹性的最小二乘混合有限元公式
DOI:
10.1007/978-3-319-31925-4_6
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发表时间:
2016
期刊:
影响因子:
--
通讯作者:
und K. Steeger
中科院分区:
文献类型:
--
作者:
J. Schröder;A. Schwarz;und K. Steeger
The performance of least-squares finite element formulations for geometrically linear and nonlinear problems is investigated in this work. We consider different elastic material behaviors as, e.g., quasi-incompressibility and transverse isotropy. Basis for the provided element formulations is a first-order system of differential equations consisting of the residual forms of the balance of momentum, a constitutive relation, and a (redundant) residual enforcing a stronger control of the balance of moment of momentum. The sum of the squared-norms of the residuals leads to a functional, which is the basis for the related minimization problem. As unknown fields the displacements (approximated in) and the stresses (approximated in) are chosen. Here, the choice of the polynomial orders of the interpolation functions for the displacements and stresses is not restricted by the so-called LBB condition; they can be chosen independently. Numerical examples for the proposed formulations are presented and compared to standard and mixed Galerkin formulations.
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DOI:
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发表时间:
1997
期刊:
影响因子:
--
作者:
M. Tchonkova;S. Sture
通讯作者:
S. Sture
DOI:
10.1002/pamm.201510104
发表时间:
2015
期刊:
PAMM
影响因子:
--
作者:
A. Schwarz;K. Steeger;J. Schröder
通讯作者:
J. Schröder
影响因子:
2.9
作者:
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通讯作者:
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影响因子:
0.6
作者:
C. B. Morrey
通讯作者:
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DOI:
--
发表时间:
1979
期刊:
影响因子:
--
作者:
J. Boehler
通讯作者:
J. Boehler