INVESTIGATION OF LOCALLY LOADED MULTILAYER SHELLS BY A MIXED FINITE-ELEMENT METHOD. 1. GEOMETRICALLY LINEAR STATEMENT

摘要

The Hu-Washizu functional is constructed for analyzing prestressed multilayer anisotropic Timoshenko-type shells. As unknown functions, six displacements and eleven strains of the faces of the shells are chosen. Based on mixed finite-element approximations, a numerical algorithm is developed for solving linear static problems of prestressed multilayer composite shells. The results of solving the well-known test problem on a cylindrical shell subjected to two opposite point forces and the problem on local loading of a toroidal multi-layer rubber-cord shell are presented.