Abstract
Currently, the use of light steel thin-walled structures from roll-formed sections in industrial and civil construction is increasing. Studies of the strength properties of these structures will lead to the development of the entire industry, including the aviation industry, which includes the development, manufacture and installation of structures using thin-walled bent profiles.
 The study tested of the influence of deplanation of the cross-section of thin-sheet plates on their use by various methods: FEM-modeling of static thin-sheet samples (plates) with various stress concentrators, imitating structural notches and / or operational defects of structural elements, structural or stimulating stress-strain. fuselage of transport aircraft, analytical calculation and carrying out a full-scale experiment. On the basis of the results obtained and their comparison, conclusions are drawn about the peculiarities of using each of them in the study of the phenomenon of warping on the load of thin-walled elements.
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