Method and system for predicting creep-fatigue life of structural part of thermal power unit
US11847387B1 · kind B1 · utility
Assignee
Inventors
Key dates
| Filing date | Apr 6, 2023 |
| Grant date | Dec 19, 2023 |
| Priority date | — |
| Expiry date | Apr 6, 2043 |
Classification
- Technology area (CPC Y)Emerging Cross-Sectional Technologies
- CPC primaryY02E60/00
- WIPO fieldComputer technology
- WIPO sectorElectrical engineering
Abstract
The present invention discloses a method and system for predicting a creep-fatigue life of a structural part of a thermal power unit. The method includes: constructing a life prediction model; acquiring a stress relaxation curve in a strain control creep-fatigue test through pure creep data to calculate an initial creep damage; acquiring a cyclic hardening coefficient, an elasticity modulus and other related material constants through the pure fatigue data to calculate an initial fatigue damage; and acquiring a difference between strain energy densities in upper and lower parts of creep-fatigue mean stress, making the difference between strain energy densities less than a set threshold through dichotomy iteration to acquire a final creep damage, a final fatigue damage and an oxidative damage under such a circumstance, and predicting the creep-fatigue life of the high-temperature structural part based on the life prediction model.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.