doi:
UDK: 629.5.021.001

INFLUENCE OF NEAR-SURFACE GRID REINFORCEMENTS ON THE STABILITY OF A THREE-LAYER SHELL WITH A SOFT FILLER

Шевелева А. Д., Миронов М. Ю.
Article language: английский

Annotation

The paper deals with the study of the influence of the parameters of a grid of filled with dispersed-reinforced epoxy binder gutters on the surface of a soft filler of a three-layer structure on critical loading levels and on the appearance of forms of loss of elastic stability of fragments of a flat panel and a conical shell. The shells of the structures are thin layers of fiberglass on a fabric basis. Structures are loaded with transverse loads, longitudinal forces, external bending and torques. The aim of the study is to evaluate the effectiveness of surface reinforcements of sandwich structures with low relative stiffness of the filler. Based on the results of numerical analysis, conclusions are drawn about the expediency of reinforcements if there is a limit on the amount of shell material used, if it is necessary to localize deflections in the form of loss of structural stability, as well as in the case of using semi-finished foams with slots. Keywords: three-layer structures, shell stability, finite element method, soft filler, forms of loss of stability, dispersed-reinforced local reinforcements

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