Goal-oriented explicit residual-type error estimates in XFEM
Goal-oriented explicit residual-type error estimates in XFEM
复制标题
XFEM 中面向目标的显式残差类型误差估计
DOI:
10.1007/s00466-012-0816-5
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发表时间:
2013
影响因子:
4.1
通讯作者:
E. Stein
中科院分区:
文献类型:
--
作者:
M. Rüter;T. Gerasimov;E. Stein
A goal-oriented a posteriori error estimator is derived to control the error obtained while approximately evaluating a quantity of engineering interest, represented in terms of a given linear or nonlinear functional, using extended finite elements oftype. The same approximation method is used to solve the dual problem as required for the a posteriori error analysis. It is shown that for both problems to be solved numerically the same singular enrichment functions can be used. The goal-oriented error estimator presented can be classified as explicit residual type, i.e. the residuals of the approximations are used directly to compute upper bounds on the error of the quantity of interest. This approach therefore extends the explicit residual-type error estimator for classical energy norm error control as recently presented in Gerasimov et al. (Int J Numer Meth Eng 90:1118–1155, 2012a). Without loss of generality, the a posteriori error estimator is applied to the model problem of linear elastic fracture mechanics. Thus, emphasis is placed on the fracture criterion, here the-integral, as the chosen quantity of interest. Finally, various illustrative numerical examples are presented where, on the one hand, the error estimator is compared to its finite element counterpart and, on the other hand, improved enrichment functions, as introduced in Gerasimov et al. (2012b), are discussed.
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DOI:
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发表时间:
2009
期刊:
影响因子:
--
作者:
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通讯作者:
Y. Renard
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2005
期刊:
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2010
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2011
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通讯作者:
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DOI:
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发表时间:
2006
期刊:
影响因子:
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作者:
M. Rüter;E. Stein
通讯作者:
E. Stein