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Journal Articles International Journal for Numerical Methods in Engineering Year : 2013

On the performance of non-conforming finite elements for the upper bound limit analysis of plates

Abstract

In this paper, the upper bound limit analysis of thin plates in bending is addressed using various types of triangular finite elements for the generation of velocity fields and second order cone programming (SOCP) for the minimization problem. Three different C1-discontinuous finite elements are considered : the quadratic 6 node Lagrange triangle (T6), an enhanced T6 element with a cubic bubble function at centroid (T6b) and the cubic Hermite triangle (H3). Through numerical examples involving Johansen and von Mises yield criteria, it is shown that cubic elements (H3) give far better results in terms of convergence rate and precision than fully conforming elements found in the literature, especially for problems involving clamped boundaries.
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Dates and versions

hal-00776908 , version 1 (18-01-2013)

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Jérémy Bleyer, Patrick de Buhan. On the performance of non-conforming finite elements for the upper bound limit analysis of plates. International Journal for Numerical Methods in Engineering, 2013, 94 (3), pp.308-330. ⟨10.1002/nme.4460⟩. ⟨hal-00776908⟩
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