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Information × Registration Number 0221U104744, 0115U001940 , R & D reports Title Elaborating the research methods for physical process in energetic units based on R-function theory popup.stage_title Head Sheyko Tetiana I., Доктор технічних наук Registration Date 07-04-2021 Organization A. Podgorny Institute of Mechanical Engineering Problems of the National Academy of Sciences of Ukraine popup.description2 A numerical-analytical method for solving nonlinear initial-boundary creep problems based on the applying the R-function, Ritz and Runge-Kutt-Merson methods by setting the creep problem of homogeneous and inhomogeneous bodies of complex shape: axisymmetrically loaded bodies of rotation with an arbitrary shape of the meridional section, flat shells and plates was developed. The problem of creep and long-term strength for layered cylinders, plates and bodies of rotation of complex shape made of functional-gradient materials is solved. The influence of gradient properties of material and geometric shape on the stress-strain state during creep is investigated. A method for determining the stress-strain state with creep of axisymmetrically loaded cylinders under conditions of uneven heating was developed. Constructive apparatus for building the equations of boundaries of domains with translational and cyclic types of symmetry, which has significantly reduced the number of operations with subsequent automation of this process, was developed. Hydrodynamic and temperature fields during polyzonal ribbing of the fuel rod shell for different values of the parameters of twisting and the type of ribbed surfaces were studied. An approach to improving the performance of displaying calculation results in 3D by ray tracing and parallelization of calculations was developed. Product Description popup.authors popup.nrat_date 2021-04-07 Close