Abstract
The main laws of processes of deformation and degradation of the initial strength properties of structural materials (metals and their alloys) according to the long-term strength mechanism are considered. In the framework of damaged medium mechanics, a mathematical model describing processes of inelastic deformation and damage accumulation in the presence of creep is developed. The model consists of three interconnected parts: relations defining inelastic behavior of the material, accounting for the effect of the failure process; equations describing kinetics of damage accumulation; a strength criterion of the damaged material. Results of experimentally studying short-term creep of VZh-159 heat-resistant alloy under constant temperatures and different values of stress applied to the specimens are given. The deformation and damage accumulation process is numerically analyzed; the obtained numerical results are compared with the data of full-scale experiments. The comparison of the numerical and experimental data makes it possible to conclude that the present defining relations of damaged medium mechanics in the presence of degradation of the initial strength properties of structural materials according to the long-term strength mechanism are adequate. Keywords: transient creep, long-term strength, modeling, defining relations, damaged medium mechanics, temperature, damage degree, material parameters, numerical and full-scale experiments.
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callDisclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
