Block-Layer Approach for the Analysis of the Stress-Strain State of Three-Layer Irregular Cylindrical Shells of Rotation
The construction of a model for the layer-by-layer stress-strain analysis of irregular cylindrical sandwich shells of revolution, in which the shell wall, including the core, is modeled in thickness by finite elements, which are then joined together and combined into blocks is considered. The model makes it possible to take into account the variation in the properties and parameters of the stress and strain state both in the meridional and circumferential coordinates and across the thickness of the shell and the core layer, to adequately model the features of the laminated inhomogeneous structure, the bending state of the bearing layers, the three-dimensional stress and strain state in the core, and also to take into account the discontinuity of the layers, various conditions for their fixing and loading. To reduce the dimension of the block-layer analysis model, effective functions of approximation of deformations and displacements are used.