The a posteriori analysis of the discretization error and the modeling error is studied for a compliance cost functional in the context of the optimization of composite elastic materials and a two-scale linearized elasticity model. A mechanically simple, parametrized microscopic supporting structure is chosen and the parameters describing the structure are determined minimizing the compliance objective. An a posteriori error estimate is derived which includes the modeling error caused by the replacement of a nested laminate microstructure by this considerably simpler microstructure. Indeed, nested laminates are known to realize the minimal compliance and provide a benchmark for the quality of the microstructures. To estimate the local difference in the compliance functional the dual weighted residual approach is used. Different numerical experiments show that the resulting adaptive scheme leads to simple parametrized microscopic supporting structures that can compete with the optimal nested laminate construction. The derived a posteriori error indicators allow to verify that the suggested simplified microstructures achieve the optimal value of the compliance up to a few percent. Furthermore, it is shown how discretization error and modeling error can be balanced by choosing an optimal level of grid refinement. Our two scale results with a single scale microstructure can provide guidance towards the design of a producible macroscopic fine scale pattern.
Accepté le :
DOI : 10.1051/m2an/2017004
Mots clés : Elastic shape optimization, two-scale optimization, nested laminates, homogenization, a posteriori error estimates, adaptive meshes
@article{M2AN_2018__52_4_1457_0,
author = {Conti, Sergio and Geihe, Benedict and Lenz, Martin and Rumpf, Martin},
title = {A posteriori modeling error estimates in the optimization of two-scale elastic composite materials},
journal = {ESAIM: Mathematical Modelling and Numerical Analysis },
pages = {1457--1476},
publisher = {EDP-Sciences},
volume = {52},
number = {4},
year = {2018},
doi = {10.1051/m2an/2017004},
mrnumber = {3875293},
zbl = {1456.65159},
language = {en},
url = {http://archive.numdam.org/articles/10.1051/m2an/2017004/}
}
TY - JOUR AU - Conti, Sergio AU - Geihe, Benedict AU - Lenz, Martin AU - Rumpf, Martin TI - A posteriori modeling error estimates in the optimization of two-scale elastic composite materials JO - ESAIM: Mathematical Modelling and Numerical Analysis PY - 2018 SP - 1457 EP - 1476 VL - 52 IS - 4 PB - EDP-Sciences UR - http://archive.numdam.org/articles/10.1051/m2an/2017004/ DO - 10.1051/m2an/2017004 LA - en ID - M2AN_2018__52_4_1457_0 ER -
%0 Journal Article %A Conti, Sergio %A Geihe, Benedict %A Lenz, Martin %A Rumpf, Martin %T A posteriori modeling error estimates in the optimization of two-scale elastic composite materials %J ESAIM: Mathematical Modelling and Numerical Analysis %D 2018 %P 1457-1476 %V 52 %N 4 %I EDP-Sciences %U http://archive.numdam.org/articles/10.1051/m2an/2017004/ %R 10.1051/m2an/2017004 %G en %F M2AN_2018__52_4_1457_0
Conti, Sergio; Geihe, Benedict; Lenz, Martin; Rumpf, Martin. A posteriori modeling error estimates in the optimization of two-scale elastic composite materials. ESAIM: Mathematical Modelling and Numerical Analysis , Tome 52 (2018) no. 4, pp. 1457-1476. doi : 10.1051/m2an/2017004. http://archive.numdam.org/articles/10.1051/m2an/2017004/
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