Design analysis and optimization of composite multiwalled load-bearing shells

The study of a new design of a multiwalled load-bearing composite shell is currently of great importance. Manufacturing such structures implies using advanced infusion and injection technologies. In this paper, a technique for design calculations is developed. It contains simple engineering formulas for multiple searches in the design optimization. Using these formulas, the numerical analysis of load-bearing capacity of shells is performed taking into account various mechanisms of compressive and buckling strength exhaustions. Design algorithms and software for the parametric analysis and optimization of multiwalled shells are developed. A numerical analysis of the influence of various parameters on the carrier capacity of a particular booster module structure is carried out. It is shown that increasing height involves transverse shear. The comparative optimization of multiwalled and threelayer shells with a honeycomb core is performed. The dependence of the mass on the carrying capacity of optimal designs is established.

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