Fatigue crack growth probability model based on stress ratio

WANG Kun-qian; XU Ren-ping; LIN Jie-hui

Volume 24 Issue 9

Sep. 2009

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WANG Kun-qian, XU Ren-ping, LIN Jie-hui. Fatigue crack growth probability model based on stress ratio[J]. Journal of Aerospace Power, 2009, 24(9): 2012-2018.

Citation:

WANG Kun-qian, XU Ren-ping, LIN Jie-hui. Fatigue crack growth probability model based on stress ratio[J]. Journal of Aerospace Power, 2009, 24(9): 2012-2018.

WANG Kun-qian, XU Ren-ping, LIN Jie-hui. Fatigue crack growth probability model based on stress ratio[J]. Journal of Aerospace Power, 2009, 24(9): 2012-2018.

Citation:

WANG Kun-qian, XU Ren-ping, LIN Jie-hui. Fatigue crack growth probability model based on stress ratio[J]. Journal of Aerospace Power, 2009, 24(9): 2012-2018.

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Fatigue crack growth probability model based on stress ratio

1.
Faculty of Mechanical and Electrical Engineering, Kunming University of Science and Technology, Kunming 650093, China
2.
Yunnan Branch of Shanghai Mitsubishi Elevator Corporation, Kunming 650011, China

Received Date: 2008-09-18
Rev Recd Date: 2009-01-14
Publish Date: 2009-09-28

Abstract

Abstract

Based on Paris formula,a fatigue crack growth probability model was established in consideration of the influence of stress ratio on fatigue crack growth rate and the dispersion of fatigue crack growth.The parameters of this probability model were estimated by using the principle of no-linear function linearization.Through this probability model and surfaces,the regulations of the effect of stress ratio on fatigue crack growth can be mastered and the probability fatigue crack growth rate curves at any stress ratios can be obtained.Availability and feasibility are indicated by an analysis of the 30CrMnSiNi2A steel test data.
- fatigue crack growth,
- fatigue crack growth probability model,
- stress ratio,
- 30CrMnSiNi2A steel