Study of geometrically nonlinear deformation of multilayer shells of small and medium thickness using the finite element method

We study the process of deforming a thin-wall structure at large deflections using the modified incremental Lagrange theory [1]. We obtained relations necessary to construct resolving matrices and vectors when using FEM and described the procedure of the stressed state recalculation when a step-by-step process is organized The work is an addition to a series of works [2-4] from which it differs by the technique of deformation calculation the class of approximations and the realization of the entire cycle of calculations of geometrically nonlinear deformation of multilayer shells of small and medium thickness. The results of solving a set of test problems are presented.