The mixed finite element formulation for three-dimensional bars

Aköz A., OMURTAG M. H., Doğruoğlu A. N.

International Journal of Solids and Structures, vol.28, no.2, pp.225-234, 1991 (Scopus) identifier


In this study, mixed finite element equations which arc based on a new functional are obtained by Gáteaux differential. This formulation is applicable to three-dimensional bars with arbitrary geometry and variable cross-sections. Boundary conditions are included in the element equations. Known nodal variable values are imposed by the Lagrange multiplier method. This newly suggested Full Functional Method (FFM) approach gives very accurate results using a few elements. © 1991.