Calculation of thin plates and shells using multi-grid finite elements with free boundaries

The multi-grid finite elements with free boundary for the deformation three-dimensional analysis of the deformation of homogeneous and composite thin elastic plates and shells with constant thickness are considered in the article. Finite elements describe the three-dimensional strained state in plates and shells, take into account their heterogeneous structure, the complex character of fastening and loading, generate discrete models of small dimension.