A New Ductility Criterion for Fatigue-Creep Life Prediction of High Temperature Components

2014 ◽  
Author(s):  
Shunpeng Zhu ◽  
Hong-Zhong Huang ◽  
Yu Liu ◽  
Liping He ◽  
Debiao Meng
Keyword(s):  
High Temperature ◽  
Life Prediction ◽  
Creep Life ◽  
Creep Life Prediction ◽  
High Temperature Components

A unified criterion for fatigue–creep life prediction of high temperature components

2016 ◽  
Vol 231 (4) ◽  
pp. 677-688 ◽  
Author(s):  
Shun-Peng Zhu ◽  
Yuan-Jian Yang ◽  
Hong-Zhong Huang ◽  
Zhiqiang Lv ◽  
Hai-Kun Wang
Keyword(s):  
High Temperature ◽  
Strain Energy ◽  
Life Prediction ◽  
Cyclic Strain ◽  
Creep Life ◽  
Creep Life Prediction ◽  
Model Predictions ◽  
Loading Waveform ◽  
Static Fracture ◽  
High Temperature Components

A unified ductility criterion for fatigue–creep life prediction is presented based on the static fracture toughness exhaustion and dissipated cyclic strain energy density of high temperature components. It provides a general failure criterion for both low and high cycle fatigue regimes. The effects of mean stress, creep and loading waveform on fatigue life are incorporated into this criterion. Applicability and prediction accuracy of the newly proposed criterion was validated through comparing model predictions to experimental results taken from the literature. The results show that the proposed criterion is robust for different loading conditions and more accurate than other existing strain energy/ductility-based methods.

scholarly journals Creep Life Prediction Method by Using High-Temperature Indentation Creep Test

Proceedings ◽  
2018 ◽  
Vol 2 (8) ◽  
pp. 450
Author(s):  
Kiyohiro Ito ◽  
Hiroki Yajima ◽  
Masayuki Arai
Keyword(s):  
High Temperature ◽  
Creep Test ◽  
Life Prediction ◽  
Prediction Method ◽  
Indentation Creep ◽  
Creep Life ◽  
Creep Life Prediction

Creep Life Prediction of Aircraft Turbine Disc Alloy Using Continuum Damage Mechanics

2017 ◽  
Vol 38 (1) ◽  
pp. 25-30
Author(s):  
Yan-Feng Li ◽  
Zhisheng Zhang ◽  
Chenglin Zhang ◽  
Jie Zhou ◽  
Hong-Zhong Huang
Keyword(s):  
Numerical Analysis ◽  
Test Data ◽  
Life Prediction ◽  
Damage Mechanics ◽  
Continuum Damage Mechanics ◽  
Creep Model ◽  
Continuum Damage ◽  
Creep Life ◽  
Creep Life Prediction ◽  
Turbine Disc

Abstract This paper deals with the creep characteristics of the aircraft turbine disc material of nickel-base superalloy GH4169 under high temperature. From the perspective of continuum damage mechanics, a new creep life prediction model is proposed to predict the creep life of metallic materials under both uniaxial and multiaxial stress states. The creep test data of GH4169 under different loading conditions are used to demonstrate the proposed model. Moreover, from the perspective of numerical simulation, the test data with analysis results obtained by using the finite element analysis based on Graham creep model is carried out for comparison. The results show that numerical analysis results are in good agreement with experimental data. By incorporating the numerical analysis and continuum damage mechanics, it provides an effective way to accurately describe the creep damage process of GH4169.

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