Codice 37/2017 Titolo Unfitted Extended Finite Elements for composite grids Data 2017-07-13 Autore/i Formaggia, L.; Vergara, C.; Zonca, S. Link Download full text Abstract We consider an Extended Finite Elements method to handle the case of composite independent grids that lead to untted meshes. We detail the corresponding discrete formulation for the Poisson problem with dis- continuous coecients. We also provide some technical details for the 3D implementation. Finally, we provide some numerical examples with the aim of showing the eectiveness of the proposed formulation.