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Information × Registration Number 0224U031473, 0119U101421 , R & D reports Title Development of methodological foundations of the influence of structural and technological factors on the kinetics of damage and the boundary state of structural elements made of advanced composite materials under thermal load conditions popup.stage_title Head Kravchuk Leonid V., Доктор технічних наук Registration Date 01-05-2024 Organization GS Pisarenko Institute of Strength Problems of the National Academy of Sciences of Ukraine popup.description2 A scientifically based methodology for assessing the influence of various factors on functional characteristics, damage kinetics, and the limit state of prospective materials of various classes for structural elements operating under conditions of extreme thermoforce loading has been developed. The modernized experimental methodical and bench base made it possible to carry out experimental studies of the strength characteristics of carbon-carbon composite materials in a wide range of temperatures and the load-bearing capacity of structural elements of various functional purposes with ablative heat-protective coatings on a gas-dynamic bench and to establish the patterns of deformation of this class of materials and damage to structural elements. The energy invariant of the current damage and the criterion of the residual strength of the material are proposed, the application of which simplifies the search for mechanically and thermodynamically similar materials, which makes it possible to differentiate and simultaneously systematize different groups of materials and, thus, to carry out operational prediction of the characteristics of the limit state. As a result of the numerical study, the influence of the degraded layer and thermal fatigue cracks on the stress state of the models under the action of the non-stationary brake fatigue load and the need to determine the strength and durability of structural elements taking into account these factors were established. As a result of the analysis of experimental and computational studies, the optimal parameters of the process of cyclic ion-plasma nitriding of the surface layers of metal structures of the responsible equipment were established.  Product Description popup.authors Yehorova Maryna I. Buiskykh Kostiantyn P. Zadvornyi Yevhenii O. Kalinichenko Vitalii I. Karpinos Borys S. Kravchuk Leonid V. Lopata Larysa A. Rutkovskyi Anatolii V. Skrypchenko Volodymyr I. Spivak Viktor M. Starynko Roman S. Trapezon Oleksandr H. popup.nrat_date 2024-05-01 Close