Computation of 3D vertex singularities for linear elasticity: Error estimates for a finite element method on graded meshes
Thomas Apel, Anna-Margarete Sändig, Sergey I. Solov'ev (2010)
ESAIM: Mathematical Modelling and Numerical Analysis
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This paper is concerned with the computation of 3D vertex singularities of anisotropic elastic fields with Dirichlet boundary conditions, focusing on the derivation of error estimates for a finite element method on graded meshes. The singularities are described by eigenpairs of a corresponding operator pencil on spherical polygonal domains. The main idea is to introduce a modified quadratic variational boundary eigenvalue problem which consists of two self-adjoint, positive...