Summary
The Dirichler problem for the equations of plane elasticity is approximated by a mixed finite element method using a new family of composite finite elements having properties analogous to those possessed by the Raviart-Thomas mixed finite elements for a scalar, second-order elliptic equation. Estimates of optimal order and minimal regularity are derived for the errors in the displacement vector and the stress tensor inL 2(Ω), and optimal order negative norm estimates are obtained inH s(Ω)′ for a range ofs depending on the index of the finite element space. An optimal order estimate inL ∞(Ω) for the displacement error is given. Also, a quasioptimal estimate is derived in an appropriate space. All estimates are valid uniformly with respect to the compressibility and apply in the incompressible case. The formulation of the elements is presented in detail.
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References
Babuška, I., Aziz, A.K.: Survey lectures on the mathematical foundations of the finite element method. In: The mathematical foundations of the finite element method with applications to partial differential equations (A.K. Aziz, ed.). New York: Academic Press 1972
Brezzi, F.: On the existence, uniqueness and approximation of saddle point problems arising from Lagrangian multipliers. R.A.I.R.O. Anal. Numér.2, 129–151 (1974)
Douglas, J., Dupont, T., Percell, P., Scott, R.: A family ofC 1 finite elements with optimal approximation properties for various Galerkin methods for 2nd and 4th order problems. R.A.I.R.O. Anal. Numér.13, 227–255 (1979)
Douglas, J., Roberts, J.E.: Mixed finite elements methods for second order elliptic problem. Matemática Applicade e Computacional1, 91–103 (1982)
Douglas, J., Roberts, J.E.: Global estimates for mixed methods for second order elliptic equations. (To appear in Math. Comput.)
Dupont, T., Scott, R.: Polynomial approximation of functions in Sobolev spaces Math. Comput.34, 441–463 (1980)
Falk, R.S., Osborn, J.E.: Error estimates for mixed methods. R.A.I.R.O., Anal. Numér.14, 309–324 (1980)
Johnson, C., Mercier, B.: Some equilibrium finite element methods for two-dimensional elasticity problems. Numer. Math.30, 103–116 (1978)
Percell, P.: On cubic and quartic Clough-Tocher finite elements. SIAM J. Numer. Anal.13, 100–103 (1976)
Raviart, P.A., Thomas, J.M.: A mixed finite element method for 2nd order elliptic problems. Mathematical aspects of the finite element method. Lecture Notes in Mathematics 606. Berlin-Heidelberg-New York: Springer 1977
Scholz, R.:L ∞-convergence of saddle-point approximation for second order problems. R.A.I.R.O. Anal. Numér.11, 209–216 (1977)
Scholz, R.: A remark on the rate of convergence for a mixed finite element method for second order problems. Numer. Funct. Anal. and Optimiz.4, 269–277 (1981/82)
Scholz, R.: OptimalL ∞-estimates for a mixed finite element method for second order elliptic and parabolic problems. (To appear in Calcolo)
Temam, R.: Navier-stokes equations. Amsterdam: North Holland 1977
Thomas, J.M.: Sur l'analyse numérique des méthodes d'éléments finis mixtes et hybrides. Thèse, Paris 1977
Vogelius, M.: An analysis of thep-version of the finite element method for nearly incompressible materials. Uniformly valid, optimal order error estimates. Numer. Math.41, 39–53 (1983)
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This work was performed while Professor Arnold was a NATO Postdoctoral Fellow
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Arnold, D.N., Douglas, J. & Gupta, C.P. A family of higher order mixed finite element methods for plane elasticity. Numer. Math. 45, 1–22 (1984). https://doi.org/10.1007/BF01379659
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DOI: https://doi.org/10.1007/BF01379659