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- W2898201077 abstract "Abstract In this paper, we propose a Strongly Stable generalized finite element method (SSGFEM) for a non-smooth interface problem, where the interface has a corner. The SSGFEM employs enrichments of 2 types: the nodes in a neighborhood of the corner are enriched by singular functions characterizing the singularity of the unknown solution, while the nodes close to the interface are enriched by a distance based function characterizing the jump in the gradient of the unknown solution along the interface. Thus nodes in the neighborhood of the corner and close to the interface are enriched with two enrichment functions. Both types of enrichments have been modified by a simple local procedure of “subtracting the interpolant.” A simple local orthogonalization technique (LOT) also has been used at the nodes enriched with both enrichment functions. We prove that the SSGFEM yields the optimal order of convergence. The numerical experiments presented in this paper indicate that the conditioning of the SSGFEM is not worse than that of the standard finite element method, and the conditioning is robust with respect to the position of the mesh relative to the interface." @default.
- W2898201077 created "2018-11-02" @default.
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- W2898201077 date "2019-02-01" @default.
- W2898201077 modified "2023-10-16" @default.
- W2898201077 title "Strongly Stable Generalized Finite Element Method (SSGFEM) for a non-smooth interface problem" @default.
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- W2898201077 doi "https://doi.org/10.1016/j.cma.2018.10.018" @default.
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