The Statistical analysis on the Paris's Fatigue Model Parameters and Prediction on Fatigue Crack Growth Life of 10Ni5CrMoV Steel and Its Joint
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摘要: 对10Ni5CrMoV钢及其接头疲劳裂纹扩展过程采用Paris模型进行拟合,并对参数c和m进行统计分析,结果表明,拟合得到的c和m与疲劳寿命吻合较好,lgc和m均符合正态分布,且具有良好的线性关系而疲劳裂纹扩展寿命呈成布尔分布。Abstract: Based on Paris's model of fatigue crack propagation, a fiting formula for the course of fatigue crack growth of 10 Ni5 CrMoV steel and its welded joint was set up, and a statistical analysis on parameters c and m of the formula and fatigue crack growth life was carried out. The results showed that the parameters c and m were in good agreement with fatigue life data, the data of lg c and m complied with normal distribution and had great linear independence, and the fatigue crack growth life was a weibull distribution.
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Key words:
- fatigue crack propagation /
- fatigue life /
- high strength steel /
- statistical analysis
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