ICOPE-15-C035 Crack Propagation Life under Low Cycle Fatigue and High Cycle Fatigue of Nuclear Steam Turbine Rotors

Shi, Jian; Wang, Yong; Li, Wangfan; Deng, Zhicheng; Yu, Yang

doi:10.1299/jsmeicope.2015.12._icope-15-_131

Cited by 1 publication

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“…It is an urgent problem to make accurate life prediction for these components in fatigue design. Therefore, the study of CCF life prediction has gradually become the focus of research on the fatigue failure of turbine blades 12–25 . Both the LCF and HCF loads can cause the turbine blade failures.…”

Section: Introductionmentioning

confidence: 99%

“…Therefore, the study of CCF life prediction has gradually become the focus of research on the fatigue failure of turbine blades. [12][13][14][15][16][17][18][19][20][21][22][23][24][25] Both the LCF and HCF loads can cause the turbine blade failures. The increase in the number of high cycle loads superimposed on the low cycle loads will lead to a significant decrease in the fatigue life under CCF loading.…”

Section: Introductionmentioning

confidence: 99%

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On the consideration of loading interaction in combined high and low cycle fatigue life prediction

Liu

Wang

Shen

et al. 2023

Fatigue Fract Eng Mat Struct

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Based on the analysis of the test data and Miner's rule, a combined high and low cycle fatigue (CCF) life prediction model considering the loading interaction is established by introducing coupled damage. The coupled damage is determined by multiplying the high cycle fatigue damage and the low cycle fatigue damage by a coupled damage coefficient K. According to the analysis of the test data, the coupled damage coefficient K is positively correlated with the high cycle stress ratio R. In addition, an interaction factor, which reflects the loading interaction effect, is introduced to correct the coefficient K. The CCF experimental data of four materials are employed for model verification and comparison among the proposed model, Miner's rule, and Trufyakov-Kovalchuk model (T-K model). The proposed model exhibits a relatively higher prediction accuracy and is more suitable for predicting the fatigue life of CCF. K E Y W O R D S combined high and low cycle fatigue, coupled damage, fatigue life, loading interaction Highlights 1. A combined fatigue life prediction model is proposed considering loading interaction.2. Coupled damage coefficient is determined through analysis of the test data. 3. The proposed model exhibits a relatively higher prediction accuracy.

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Section: Introductionmentioning

confidence: 99%