Research on Creep-Fatigue Life Prediction for P92 Steel under Stress-Controlled State

2013 ◽  
Vol 860-863 ◽  
pp. 972-977 ◽  
Author(s):  
De Xian Wang ◽  
Dong Mei Ji ◽  
Jian Xing Ren
Keyword(s):  
Experimental Data ◽  
Life Prediction ◽  
Fatigue Life Prediction ◽  
Effective Coefficient ◽  
P92 Steel ◽  
Modified Model ◽  
Model Predictions ◽  
Creep Fatigue ◽  
Prediction Capability ◽  
Life Prediction Model

Taking the P92 steel as the object,Creep-Fatigue (CF) tests of P92 steel at 873K under stress-controlled were carried out with GWT2504 equipment to investigate the CF life prediction. The life prediction model based on Applied Mechanical Work Density (AMWD) was developed in this study,and introduce the effective coefficient ƞ to modify the former. To verify the prediction capability of the AMWD-based and the modified model, comparisons of the models predicted lives with the experimental data of CF tests on P92 steel at 873K were made, it is found out that the AMWD-based model predictions for CF are in agreement with the experimental lives with the factors of 0.9013 and 1.0600, which verifies the model has a good predictability, and the Modified model with the factors of 0.9558 and 1.0469.

scholarly journals A New Empirical Life Prediction Model for 9–12%Cr Steels under Low Cycle Fatigue and Creep Fatigue Interaction Loadings

Metals ◽  
2019 ◽  
Vol 9 (2) ◽  
pp. 183 ◽  
Author(s):  
Xiaowei Wang ◽  
Wei Zhang ◽  
Tianyu Zhang ◽  
Jianming Gong ◽  
Magd Abdel Wahab
Keyword(s):  
Experimental Data ◽  
Life Prediction ◽  
Low Cycle Fatigue ◽  
Hold Time ◽  
Cycle Fatigue ◽  
P92 Steel ◽  
Creep Fatigue ◽  
Effects Of Temperature ◽  
Temperature Strain ◽  
Life Prediction Model

Low cycle fatigue (LCF) and creep fatigue interaction (CFI) loadings are the main factors resulting in the failure of many critical components in the infrastructure of power plants and aeronautics. Accurate prediction of life spans under specified loading conditions is significant for the design and maintenance of components. In the present study, various LCF and CFI tests are conducted to investigate the effects of temperature, strain amplitude, hold time and hold direction on the fatigue life of P92 steel. To predict fatigue life under different experimental conditions, various conventional life prediction models are evaluated and discussed. Moreover, a new empirical life prediction model is proposed based on the conventional Manson-Coffin-Basquin (MCB) model. The newly proposed model is able to simultaneously consider the effects of temperature, strain amplitude, hold time and hold direction on predicted life. The main advantage is that only the known input experimental parameters are required to perform the prediction. In addition to the validation made through the experimental data of P92 steel conducted in the present paper, the model is also verified through numerous experimental data reported in the literature for various 9–12% Cr steels.

P92 steel creep-fatigue interaction responses under hybrid stress-strain controlled loading and a life prediction model

2020 ◽  
Vol 140 ◽  
pp. 105837
Author(s):  
Tianyu Zhang ◽  
Xiaowei Wang ◽  
Yunnan Ji ◽  
Wei Zhang ◽  
Tasnim Hassan ◽  
...  
Keyword(s):  
Prediction Model ◽  
Life Prediction ◽  
Stress Strain ◽  
P92 Steel ◽  
Creep Fatigue ◽  
Life Prediction Model ◽  
Hybrid Stress

A creep-fatigue life prediction model considering multi-factor coupling effect

2021 ◽  
Vol 0 (0) ◽  
Author(s):  
Junzhou Huo ◽  
Debin Sun ◽  
Shaoxia An
Keyword(s):  
Fatigue Life ◽  
Prediction Model ◽  
Life Prediction ◽  
Evaluation Method ◽  
Prediction Models ◽  
Coupling Effect ◽  
Fatigue Life Prediction ◽  
Creep Fatigue ◽  
Exhaustion Method ◽  
Life Prediction Model

Abstract A creep-fatigue life prediction model based on a novel creep damage evaluation method (NCDEM) considering the multi-factor coupling effect is presented in this paper. Further, to verify the validity and practicability, the creep-fatigue life of GH4169 at 650 °C is calculated to compare with the experimental results. Ultimately, the prediction results are respectively compared with those of the creep-fatigue life prediction models based on the time fraction method (TFM), ductility exhaustion method (DEM), and strain energy density exhaustion method (SEDEM). Consequently, the prediction results are distributed in ±1.5 times dispersion band, which elucidates the creep-fatigue life prediction model proposed based on the NCDEM has the best ability.

Normalized creep–fatigue life prediction model based on the energy dissipation during hold time

2007 ◽  
Vol 460-461 ◽  
pp. 195-203 ◽  
Author(s):  
Chang Yeol Jeong ◽  
Jung-Chan Bae ◽  
Chang-Seog Kang ◽  
Jae-Ik Cho ◽  
Hyeon-Taek Son
Keyword(s):  
Fatigue Life ◽  
Energy Dissipation ◽  
Prediction Model ◽  
Life Prediction ◽  
Hold Time ◽  
Fatigue Life Prediction ◽  
Model Based ◽  
Creep Fatigue ◽  
Life Prediction Model
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