Modeling deformation of materials and structures of nuclear power engineering subjected to thermal-radiation effects

• Published in: Continuum mechanics and thermodynamics 2021-07, Vol.33 (4), p.1053-1061
• Main Authors: Gorokhov, Vasilii A., Kapustin, Sergei A., Churilov, Yuri A., Igumnov, Leonid A.
• Format: Article
• Language: English
• Subjects: Analysis; Classical and Continuum Physics; Creep (materials); Deformation; Deformation effects; Engineering Thermodynamics; Heat and Mass Transfer; Irradiation; Mathematical models; Nuclear energy; Original Article; Parameters; Physics; Physics and Astronomy; Radiation; Radiation effects; Structural Materials; Theoretical and Applied Mechanics
• ISSN: 0935-1175; 1432-0959
• DOI: 10.1007/s00161-020-00946-5

The present paper develops a version of a compound hierarchical model of materials, which implements a possibility of representing a complex process of the development of interrelated deformation effects in the form of a succession of formally independent elementary acts described by the related particular models of irradiation-induced swelling, plasticity, thermal and irradiation creep. In describing actual processes, the interaction and mutual effect of such elementary acts are taken into account on the top level of the compound model, providing for the successive initialization of the particular models and updating their constituent parameters (stresses and parameters characterizing the history of elastoviscoplastic deformation of materials). Using the example of steel Kh16N11KM3, a number of benchmark problems have been analyzed. The obtained results show that the developed software product can be effectively used for analyzing problems of deformation of structures under thermal-radiation effects. The process of deformation of a model of a shell ring of a fast-neutron reactor reflector made of steel Kh16N11M3 in the conditions of spatial thermal-radiation effects has been numerically analyzed.