This article concerns an extension of the topological derivative concept for 3D elasticity problems involving elastic inhomogeneities, whereby an objective function 𝕁 is expanded in powers of the characteristic size of a single small inhomogeneity. The approximation of 𝕁 is derived and justified for an inhomogeneity of given location, shape and elastic properties embedded in a 3D solid of arbitrary shape and elastic properties; the background and the inhomogeneity materials may both be anisotropic. The generalization to multiple small inhomogeneities is concisely described. Computational issues, and examples of objective functions commonly used in solid mechanics, are discussed.
Mots clés : Topological derivative, asymptotic expansion, volume integral equation, elastostatics
@article{M2AN_2017__51_6_2069_0, author = {Bonnet, Marc and Cornaggia, R\'emi}, title = {Higher order topological derivatives for three-dimensional anisotropic elasticity}, journal = {ESAIM: Mathematical Modelling and Numerical Analysis }, pages = {2069--2092}, publisher = {EDP-Sciences}, volume = {51}, number = {6}, year = {2017}, doi = {10.1051/m2an/2017015}, zbl = {1382.35071}, mrnumber = {3745165}, language = {en}, url = {http://www.numdam.org/articles/10.1051/m2an/2017015/} }
TY - JOUR AU - Bonnet, Marc AU - Cornaggia, Rémi TI - Higher order topological derivatives for three-dimensional anisotropic elasticity JO - ESAIM: Mathematical Modelling and Numerical Analysis PY - 2017 SP - 2069 EP - 2092 VL - 51 IS - 6 PB - EDP-Sciences UR - http://www.numdam.org/articles/10.1051/m2an/2017015/ DO - 10.1051/m2an/2017015 LA - en ID - M2AN_2017__51_6_2069_0 ER -
%0 Journal Article %A Bonnet, Marc %A Cornaggia, Rémi %T Higher order topological derivatives for three-dimensional anisotropic elasticity %J ESAIM: Mathematical Modelling and Numerical Analysis %D 2017 %P 2069-2092 %V 51 %N 6 %I EDP-Sciences %U http://www.numdam.org/articles/10.1051/m2an/2017015/ %R 10.1051/m2an/2017015 %G en %F M2AN_2017__51_6_2069_0
Bonnet, Marc; Cornaggia, Rémi. Higher order topological derivatives for three-dimensional anisotropic elasticity. ESAIM: Mathematical Modelling and Numerical Analysis , Tome 51 (2017) no. 6, pp. 2069-2092. doi : 10.1051/m2an/2017015. http://www.numdam.org/articles/10.1051/m2an/2017015/
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