Constant‐free explicit error estimator with sharp upper error bound property for adaptive FE analysis in elasticity and fracture
Constant‐free explicit error estimator with sharp upper error bound property for adaptive FE analysis in elasticity and fracture
复制标题
恒定自由显式误差估计器,具有尖锐的误差上限特性,适用于弹性和断裂的自适应有限元分析
DOI:
10.1002/nme.4768
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发表时间:
2014
影响因子:
2.9
通讯作者:
P. Wriggers
中科院分区:
文献类型:
--
作者:
T. Gerasimov;E. Stein;P. Wriggers
Theexplicit residual‐basederror estimator originally proposed by Babuška and Miller (1987) for adaptive finite element analysis with application to problems of linear elasticity and fracture is known to be one of the most simple and inexpensive error estimators. Indeed, it provides a theoreticallyguaranteedupper bound on a discretization error, measured in the energy norm, and requires small (nearly negligible) post‐processing computational effort. The main issue with this classical estimator, however, is that an upper error bound is explicitly computable up to anunknownmultiplicative constant. In this paper, we track the source of this generic constant, revise the original derivation procedure and derive analytically fourpre‐computableconstants that constitute an upper error bound, resulting in, what we then call, theconstant‐freeerror estimator of the Babuška‐Miller type. The performance of this constant‐free estimator, as well as an adaptive FEM based on it, are illustrated on regular and singular benchmark problems and on numerical examples featuring crack propagation. The special property of the estimator is a sharp upper bound of the error: effectivity indices in the range of 1.2–2.0 are obtained, what is treated as practically (very) acceptable. In terms of efficiency judged against simplicity and inexpensiveness, the proposed constant‐free explicit estimator is superior to, for example, correspondingimplicitresidual estimators and may be seen as a very competitive one in comparison with other known, yet more intricate and complex error estimation techniques. Copyright © 2014 John Wiley & Sons, Ltd.
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影响因子:
7.2
作者:
E. Stein;M. Rüter;S. Ohnimus
通讯作者:
S. Ohnimus
DOI:
--
发表时间:
2007
期刊:
影响因子:
--
作者:
P. Díez;Juan José Ródenas;O. Zienkiewicz
通讯作者:
O. Zienkiewicz
影响因子:
2.1
作者:
A. Veeser;R. Verfürth
通讯作者:
R. Verfürth
影响因子:
4.1
作者:
M. Rüter;T. Gerasimov;E. Stein
通讯作者:
E. Stein
DOI:
--
发表时间:
2006
期刊:
影响因子:
--
作者:
M. Rüter;E. Stein
通讯作者:
E. Stein