A new adaptive multiscale method based on the estimate of residual forces for static analysis of heterogeneous materials
A new adaptive multiscale method based on the estimate of residual forces for static analysis of heterogeneous materials
复制标题
一种基于残余力估计的新型自适应多尺度方法,用于异质材料的静态分析
DOI:
10.1016/j.finel.2015.04.001
复制
发表时间:
2015-09
影响因子:
3.1
通讯作者:
Xihua Chu
中科院分区:
文献类型:
--
作者:
Hui Liu;Xiaoyu Sun;Yuanjie Xu;Xihua Chu
A new adaptive multiscale method (AMM) is developed based on the estimate of residual forces for static analysis of heterogeneous materials. The AMM is established by combining multi-node extended multiscale finite element method (multi-node EMsFEM) with a new proposed macroscopic node adaptive algorithm. In our previous multiscale computations, macroscopic nodes are placed uniformly along each edge of multi-node coarse element without considering local strain or displacement gradient. In this paper, to optimize the distribution of macroscopic nodes, a new adaptive algorithm is proposed based on the estimate of residual forces. Numerical experiments have indicated that residual forces exist even for linear elastic problems. For boundary external loading cases, residual forces only exist on the edges of coarse element. Besides, computations indicate that residual forces can reflect local relative errors in the multi-node EMsFEM computations. Thus it is reasonable and suitable to take residual forces as local relative error indicators in the multi-node EMsFEM computations. Finally, the AMM is developed based on this idea. To verify the validity of this proposed method, three typical numerical examples are carried out. The examples demonstrate that nearly optimal distributions of macroscopic nodes can be obtained by employing the proposed AMM.
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影响因子:
1
作者:
Weinan E
通讯作者:
Weinan E
DOI:
10.1016/j.cma.2010.06.012
发表时间:
2011-09
影响因子:
7.2
作者:
A. Abdulle;A. Nonnenmacher
通讯作者:
A. Abdulle;A. Nonnenmacher
影响因子:
4.1
作者:
Hou, Yanren;Zheng, Haibiao;Shi, Feng
通讯作者:
Shi, Feng
DOI:
10.1016/j.cma.2010.06.013
发表时间:
2011-09
影响因子:
7.2
作者:
I. Temizer;P. Wriggers
通讯作者:
I. Temizer;P. Wriggers
DOI:
10.1016/s0022-5096(98)00051-9
发表时间:
1999-03-01
影响因子:
5.3
作者:
Shenoy, VB;Miller, R;Ortiz, M
通讯作者:
Ortiz, M