Zhigily D. Structural strength of the combined high-pressure cylinder.

Based on discrete-structural theory of anisotropic plates and shells, methodology of geometrically nonlinear contact problem solving is developed. This problem appears during a strength design of multi-layered anisotropic plates and shells with a glance to both ideal and nonideal contact between layers. Solutions of wide class of contact problems are found. The basic mechanism of deflected mode and contact pressure changes in the area of starved spots and delaminations is revealed. The influence of structure inhomogeneity of multilayer material is studied at the macrolevel with the use of algorithm of stage-by-stage loading and choosing of one or another variant of the offered multilayered structure calculation models. An adoption of one calculation model to another one is determined by the terms of composites strength in the junction surface points of the most loaded layers of the construction. Experimental researches are led and numerical solving of the test problems is got for conceptual issues and efforts authenticity estimation. The methodology of structural strength and load-carrying ability calculation of difficult form layered rotation shells based on deflection method is offered. Structural strength and load-carrying ability of the hybrid high-pressure balloon are studied. This combined high-pressure cylinder consists of load-bearing glass-fibre plastic shell and external protective metal shell.