Abstract
Following a review of published papers devoted to calculations of braided composite structures, basic requirements for computational models are formulated. A mathematical model intended for design calculations of braided structures of shells of revolution is presented. The dependences for calculating the stiffness, thermal deformation, and strength characteristics of a braided composite material are given depending on the braiding scheme, reinforcement angle, and the current radius of the shell. The relationship between the angle of reinforcement, the thickness of the single-pass layer and the coverage rate of the structure that determines the degree of continuity of the layer is investigated. The features of calculations of structures with a two-axis and three-axis braiding scheme are discussed. Examples of calculations of specific composite structures are given, the dependences of elastic moduli, coefficients of linear thermal expansion and ultimate strengths on the variation of the radius of a typical braided carbon-ceramic composite shell are demonstrated.
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