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Four-noded mixed finite elements, using unsymmetric stresses, for linear analysis of membranes. (English) Zbl 0773.73085

Summary: A family of new 4-noded membrane elements with drilling degrees of freedom and unsymmetric assumed stresses is presented; it is derived from a mixed variational principle originally formulated for finite strain analysis and already used in the literature to develop a purely kinematic membrane model. The performance of these elements, investigated through some well established benchmark problems, is found to be fairly good and their accuracy is comparable with that given by models with a larger number of nodal parameters.

MSC:

74S05 Finite element methods applied to problems in solid mechanics
74K20 Plates
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