EXPERIMENTAL-THEORETICAL STUDY OF THE BEHAVIOR OF STRUCTURAL PARTS OF HEAT-RESISTANT ALLOY UNDER HIGH-TEMPERATURE CREEP

Abstract

A complex of experimental and methodological means used for modeling the processes of deformation and failure of structural parts made of heat-resistant alloy ВЖ-159 (developed by FSUE "VIAM"), is discussed. Models describing the behavior of such materials under the conditions of quasi-static thermal-force loading are introduced. The problems of constructing material functions of the above models are examined, and their verification is done using the examples of recovering the uniaxial deformation and creep curves for various temperatures. The problems of numerically modeling the elasto-visco-plastic behavior of a fragment of a structure under the effect of temperatures varying in a preset sequence, distributed loads, and long-term loading are presented.

Key words: experimental and methodological means, modeling, deformation, failure, heat-resistant alloy ВЖ-159, quasistatic thermal-force loading, uniaxial deformation, high-temperature creep, elasto-visco-plastic behavior of a fragment of a structure.