We consider the Griffith fracture model in two spatial dimensions, and prove existence of strong minimizers, with closed jump set and continuously differentiable deformation fields. One key ingredient, which is the object of the present paper, is a generalization to the vectorial situation of the decay estimate by De Giorgi, Carriero, and Leaci. This is based on replacing the coarea formula by a method to approximate functions with small jump set by Sobolev functions, and is restricted to two dimensions. The other two ingredients will appear in companion papers and consist respectively in regularity results for vectorial elliptic problems of the elasticity type and in a method to approximate in energy functions by ones.
@article{AIHPC_2019__36_2_455_0, author = {Conti, Sergio and Focardi, Matteo and Iurlano, Flaviana}, title = {Existence of strong minimizers for the {Griffith} static fracture model in dimension two}, journal = {Annales de l'I.H.P. Analyse non lin\'eaire}, pages = {455--474}, publisher = {Elsevier}, volume = {36}, number = {2}, year = {2019}, doi = {10.1016/j.anihpc.2018.06.003}, mrnumber = {3913194}, language = {en}, url = {http://www.numdam.org/articles/10.1016/j.anihpc.2018.06.003/} }
TY - JOUR AU - Conti, Sergio AU - Focardi, Matteo AU - Iurlano, Flaviana TI - Existence of strong minimizers for the Griffith static fracture model in dimension two JO - Annales de l'I.H.P. Analyse non linéaire PY - 2019 SP - 455 EP - 474 VL - 36 IS - 2 PB - Elsevier UR - http://www.numdam.org/articles/10.1016/j.anihpc.2018.06.003/ DO - 10.1016/j.anihpc.2018.06.003 LA - en ID - AIHPC_2019__36_2_455_0 ER -
%0 Journal Article %A Conti, Sergio %A Focardi, Matteo %A Iurlano, Flaviana %T Existence of strong minimizers for the Griffith static fracture model in dimension two %J Annales de l'I.H.P. Analyse non linéaire %D 2019 %P 455-474 %V 36 %N 2 %I Elsevier %U http://www.numdam.org/articles/10.1016/j.anihpc.2018.06.003/ %R 10.1016/j.anihpc.2018.06.003 %G en %F AIHPC_2019__36_2_455_0
Conti, Sergio; Focardi, Matteo; Iurlano, Flaviana. Existence of strong minimizers for the Griffith static fracture model in dimension two. Annales de l'I.H.P. Analyse non linéaire, Tome 36 (2019) no. 2, pp. 455-474. doi : 10.1016/j.anihpc.2018.06.003. http://www.numdam.org/articles/10.1016/j.anihpc.2018.06.003/
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