Comparative Analysis of Simplest Triangular Finite Elements of Kirchhoff Thin Plates

The construction of two triangular finite elements of Kirchhoff plates from the 9-degree of freedom elements family is set forth in detail: an element of the displacement method with forced slope compatibility of normals and a hybrid element of the stress method. Based on solutions of test tasks, the comparative precision estimation is given for the finite elements and also the non-conformal Zenkevich element and an element with the discrete application of the Kirchhoff hypothesis. The hybrid element is shown to have the highest precision among the elements under consideration.