Abstract
In this paper, we study the approximation of eigenvalues arising from the mixed Hellinger–Reissner elasticity problem by using a simple finite element introduced recently by one of the authors. We prove that the method converges when a residual type error estimator is considered and that the estimator decays optimally with respect to the number of degrees of freedom. A postprocessing technique originally proposed in a different context is discussed and tested numerically.
Funding source: Deutsche Forschungsgemeinschaft
Award Identifier / Grant number: BE 6511/1-1
Funding source: Alexander von Humboldt-Stiftung
Award Identifier / Grant number: STA 402/14-1
Funding statement: The first author gratefully acknowledges support by the Deutsche Forschungsgemeinschaft in the Priority Program SPP 1748 Simulation Techniques in Solid Mechanics, Development of Non-standard Discretization Methods, Mechanical and Mathematical Analysis, under the project number BE 6511/1-1. The second author is a member of the INdAM Research group GNCS, and his research is partially supported by IMATI/CNR and by PRIN/MIUR. The research of the third author was supported by the Alexander von Humboldt Foundation through the Humboldt Research Fellowship for Postdoctoral Researchers and in the project Approximation and reconstruction of stresses in the deformed configuration for hyperelastic material models (STA 402/14-1) by the DFG via the priority program 1748 Reliable Simulation Techniques in Solid Mechanics, Development of Non-standard Discretization Methods, Mechanical and Mathematical Analysis.
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