Solovey M. Stability and buckling behaviour of elastic inhomogeneous shells under thermoforce loads

The new finite element method of solving static problems of geometrically nonlinear deformation, stability and buckling behaviour of a wide class of thin elastic inhomogeneous shells with complicated form and structure under thermoforce loads is developed because of uniform methodological positions of the three-dimensional theory thermoelasticity. The new universal space finite element with additional variable parameters is developed. This has allowed building a calculated model, which takes into account inhomogeneous of a material and geometric singularities of the different constructive elements of a shell. The algorithm of automated passing of the diagram "load-displacement" with the definition of singular points (points ramifying and critical) is developed. The numerical substantiation reliability and exactness of obtained solutions is carried out. The new tasks have been considered, by analysis of which the specificity of thermoelastic deformation, loss of stability and buckling behaviour of inhomogeneous shells under different conditions of thermoforce loads has been investigated.