Locking effects in the finite element approximation of plate models

Suri, Manil; Babuška, Ivo; Schwab, Christoph

doi:10.1090/S0025-5718-1995-1277772-6

Locking effects in the finite element approximation of plate models
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by Manil Suri, Ivo Babuška and Christoph Schwab PDF

Math. Comp. 64 (1995), 461-482 Request permission

Abstract:

We analyze the robustness of various standard finite element schemes for a hierarchy of plate models and obtain asymptotic convergence estimates that are uniform in terms of the thickness d. We identify h version schemes that show locking, i.e., for which the asymptotic convergence rate deteriorates as $d \to 0$, and also show that the p version is free of locking. In order to isolate locking effects from boundary layer effects (which also arise as $d \to 0$), our analysis is carried out for the periodic case, which is free of boundary layers. We analyze in detail the lowest model of the hierarchy, the well-known Reissner-Mindlin model, and show that the locking and robustness of finite element schemes for higher models of the hierarchy are essentially identical to the Riessner-Mindlin case.

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