Nonlinear Deformation and Stability of a Noncircular Cylindrical Shell under Combined Loading with Bending and Twisting Moments
V. K. Belov, L. P. Zheleznov, T. S. Ognyanova
Siberian Aeronautic Research Institute (SibNIA) named after S. A. Chaplygin, Novosibirsk, 630000, Russia
Keywords: некруговые цилиндрические композитные оболочки, дискретное подкрепление, нелинейное деформирование, устойчивость, метод конечных элементов, noncircular cylindrical composite shells, discrete reinforcement, nonlinear deformation, stability, finite element method
Abstract
A previously developed technique is used to solve problems of strength and stability of discretely reinforced noncircular cylindrical shells made of a composite material with allowance for the moments and nonlinearity of their subcritical stress-strain state. Stability of a reinforced bay of the aircraft fuselage made of a composite material under combined loading with bending and twisting moments is studied. The effects of straining nonlinearity, stiffness of longitudinal ribs, and shell thickness on the critical loads that induce shell buckling are analyzed.
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