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Information × Registration Number 0225U002609, (0119U103519) , R & D reports Title Investigation of the behavior of different structure composite materials (reinforced by short fibers and layered) and shell structures made of them at conditions of compressive loadings popup.stage_title Аналіз результатів дослідження поведінки композитних матеріалів та конструкцій з них при стискаючих навантаженнях. Розробка практичних рекомендацій по застосуванню отриманих результатів. Head Nazarenko Volodymyr M., д.т.н. Registration Date 21-03-2025 Organization S.P. Tymoshenka Institute of Mechanics of the National Academy of Sciences of Ukraine popup.description1 The purpose of the work is: - development of a numerical-analytical technique for solving the problem of the fracture of composite materials at compression along interacting cracks in three-dimensional formulation; - study of critical stresses and shortenings in composites at compression along interacting cracks; - development of methods for studying the stress-strain state of a piecewise homogeneous body withsmall-scale cracks at the angular point of the interface; - development of a numerical-analytical technique for solving the problem of the destruction of composite materials at compression along interacting cracks; - development of new numerical models, development of methods for solving discrete problems, creation and implementation of appropriate software for solving plane and spase problems of determination of boundary effects and stability of composites; - research in the framework of the three-dimensional approach of the influence of structural heterogeneity and complex conditions of compressive loads on the buckling of composite materials, which are reinforced by layers and short fibers; - development of an algorithm for solving the problem of nonlinear deformation and stability of layered cylindrical shells, taking into account their sensitivity to imperfections; investigation of critical loads of layered cylindrical shells and prediction of the nature of their post-buckling behavior in order to choose rational schemes of reinforcement and placement of layers popup.description2 Within the framework of the three-dimensional linearized stability theory, new results have been obtained on the mechanisms of fracture of reinforced composite materials, which are associated with the loss of stability in their structure and the loss of stability of the material in the vicinity of interfacial defects. A methodology and algorithms for calculating the problem of the stability of three-layer cylindrical composite shells with transversely elastic filler have been developed. The conducted research is of both theoretical and practical interest. The results can be used in the creation of structures in mechanical and shipbuilding, instrument making, and aviation and space technology.  Product Description popup.authors Bystrov Victor M. Bohdanov V. L. Boichuk Vitalina Yu. Velychko Larysa H. Dekret Volodymyr A. Dovzhyk Mykhailo V. Zhukova Nataliia B. Zagorodniuk Olena M. Zelenskii Valerii S. Kipnis Oleksandr L. Martynova Liudmila I Proshchenko Oleksandr A. Tsyruk Serhii A. Shykula Olena M. popup.nrat_date 2025-03-21 Close