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Information × Registration Number 0221U102943, 0116U006049 , R & D reports Title Strength, stiffness, stability and oscillations of homogeneous and non-nomogeneous bars, plates, shells and composite structures, including objects of biologic origin popup.stage_title Head Krasovskyi Vasyl L, Registration Date 12-02-2021 Organization Prydniprovsk State Academy of Civil Engineering and Architecture, Dnipropetrovs'k, Ukraine popup.description2 The object of research is rod systems, homogeneous and inhomogeneous plates and shells, composite structures, and objects of biological origin. The purpose of the work is to clarify the calculations of structures, which will increase reliability and reduce material consumption. Discusses the calculation of rod, shell and continuum systems in terms of deterministic and uncertain information about the initial data and objectives of the study. Under conditions of uncertainty, the approaches of probability theory, fuzzy set theory, and inaccurate set theory were used. The problems of simultaneous use of data of different nature of uncertainty were considered. A numerical study was performed in the PC environment ANSYS deformation and stability of elastic circular flat closed conical shells with periodically inhomogeneous in the circumferential direction of the VAT, due to various reasons. The main attention is paid to the study of the effect of "static resonance", the essence of which is a significant increase in transverse displacements of the shell and a sharp decrease in the load of its bulge with periodic in the circumferential direction VAT variability coinciding with the variability of the first form of natural transverse oscillations. Numerical calculations of VAT systems "joint-implant", in order to study their strength and rigidity. Implants used in the treatment of injuries and diseases of the hip, knee and ankle joints of man were considered. According to the obtained conclusions, recommendations are given to traumatologists on the technical part of implantation of orthopedic structures, and the correctness of calculations and correctness of construction of calculation models is confirmed by the high level of the received clinical results of treatment. Develops methods for determining the VAT of elastic non-thin plates and flat shells under the action of different types of transverse loads. The convergence and accuracy of the obtained solutions are investiga Product Description popup.authors Varianychko Maryna O Volchok Denys L Haidar Anastasiia M Danishevskyi Vladyslav V Zelenskyi Anatolii H Karasov Oleksii H Kozhemiakina Iryna F Krasovskyi Vasyl L Nahornyi Dmytro V Panchenko Serhii P Pohasii Olena A popup.nrat_date 2021-02-11 Close