| Title |
Mathematical Modeling ; LCF Life Prediction for Waspaloy in the Creep - Fatigue Interaction Regime |
| Authors |
염종택(Jong Taek Yeom),박노광(Nho Kwang Park) |
| ISSN |
1738-8228(ISSN), 2288-8241(eISSN) |
| Abstract |
This paper describes the empirical rule of strain rate modified linear accumulation of creep damage(SRM rule) for low-cycle fatigue(LCF) life prediction of Waspaloy in the creep-fatigue interaction regime and Chaboche type unified viscoplastic model predicting the stress-strain response in various cyclic loading conditions. The comparison of the experimental data and the predictions for strain controlled LCF tests carried out for various strain ranges at 600℃ and 650℃ was made. Chaboche type unified viscoplastic model described efficiently the inelastic deformation behavior during LCF tests. Crack-initiation lifing method to predict the material life was investigated with strain rate modification(SRM) rule. The application of SRM rule to LCF tests on Waspaloy indicated a good agreement between measured and predicted cycles to failure. |