Tatarinova O. Development of the numerical method for estimation of durability of cyclically loaded non-symmetric thin-walled structural members

The objects of investigations are thin non-axisymmetrical cyclically loaded shell structural members. The goal of the investigations is the development of the calculational method for the estimation of long-term strength of thin-walled non-axisymmetrical shell structures of different appointment as well as products of continuous casting, which are working in irreversible creep conditions. The methods of investigations are the methods of thin shell theory, creep theory and continuum damage mechanics, asymptotical methods, Finite Element Method, methods of Gauss, Newton-Cotes, Cholessky, Euler, predictor-corrector and frontal. Theoretical and practical results: cyclic creep-damage laws for materials and shell structures, including liquid rocket and gas turbine engines, as well as the optimal parameters for technological process of continuous casting, were obtained. Originality consists in the development of the method for calculation as well as the software for the estimation of structural long-term strength of thin-walled non-axisymmetrical shell machine elements in cyclic creep conditions. Degree of implementation: results of the investigations, conclusions and recommendations were used for design of new technique in Company 'Ukr. Agro-Servis' and for design of bronze bar's continuous casting technological process in Open Stock Company 'Energoprom'. The branch of using: machine building, education.