Dual analysis with general boundary conditions. (English) Zbl 0851.73057

This paper presents a reexamination of the dual error measure by a way which avoids any use of upper and lower bounds of the energy. It is found that such an error measure holds whatever the boundary conditions are. Furthermore, it is not necessary to obtain the approximate solutions by a Rayleigh-Ritz process, so that the second analysis, which seemed necessary in the original dual analysis concept, may be replaced by any admissible approximation. This implies the possibility of a dual measure at a simple post-processor level.


74S05 Finite element methods applied to problems in solid mechanics
74B05 Classical linear elasticity
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