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Information × Registration Number 0216U007054, 0111U001436 , R & D reports Title Study of the strength of inhomogeneous thin-walled structures of power industry objects taking into account changes due to exploitation and manufacturing technology operation popup.stage_title Head Hudramovych Vadym Sergiyovych, Registration Date 23-03-2016 Organization The Institute of Technical Mechanics of the National Academy of Sciences of Ukraine and the State Space Agency of Ukraine popup.description2 The research objectives are 1) to build mathematical models for calculating the strength (stressed-strained state) of thin-walled structures for heat-and-power engineering and machine-building considering variations in the design due to operational loads and technological processes for manufacturing; 2) to develop new techniques and algorithms for modeling the carrying capacity of thin-walled structures; 3) to extend analytical and numerical methods of study; 4) to investigate experimentally the stability of shells with cuts simulated structural members of heat-and-power engineering and machine-building. Theoretical and numerical methods and ones of statics and dynamics of thin-walled structures, structural mechanics, computational mathematics, experimental investigations are used. The results obtained. Based on developed procedures and algorithms, stressed-strained states of structural plate members with one and two different-shaped cuts (rectangular, circular, elliptic) in elastoplastic straining are analyzed numerically. The effects of shapes and sizes of cuts, distances between them are studied. Values of loads resulting in plastic deformations and formation of general zones of plastic deformations for cuts (initial failure) are studied. An approach to solutions of problems in optimal designing rod structures under simultaneous action of power loads and aggressive medium is developed to solve problems in the determination of rational parameters. Experimental investigations into the effects of cuts on the stability of modelled cylindrical shells in different loading are made. The effects of shapes and sizes of cuts, their locations on the values of critical loads are studied. Special features of wave formation and shapes of losses in stability are analyzed. Practical significance of the study lies in the fact that the results obtained help in assessing a more proper strength and finding additional resources of robustness of non-uniform members for heat-and-power engineering installations and machine-building under complicated operational conditions, resulting in designing rational structures and improving production technologies. Product Description popup.authors Блажко Володимир Анатолійович Гудрамович Вадим Сергійович Демешко Михайло Пилипович Дзюба Анатолій Петрович Ноздріна Ольга Станіславівна Репринцев Олексій Васильович Рябоконь Сергій Андрійович Самарська Олена Вікторівна Спінул Антоніна Данилівна popup.nrat_date 2020-04-02 Close