为了表征测量结果的可靠性,基于JJF 1059.1—2012标准,对TC4钛合金的疲劳寿命进行不确定度评定。不确定度数学模型为线性关系模型,将试验数据代入模型中进行待定系数求解。在评定不确定度的过程中,对疲劳寿命数据的正态性检验以及异常值进行了判定。结果表明:TC4钛合金疲劳寿命不服从正态分布,对数疲劳寿命服从正态分布。

In order to characterize the reliability of the measurement results, the uncertainty of fatigue life of TC4 titanium alloy was evaluated based on JJF 1059.1-2012. Uncertainty mathematical model was a linear relationship model, the test data were substitute into model to solve undetermined coefficient. In the process of evaluating uncertainty, the normality test of fatigue life data and the abnormal value were decided. The results show that the fatigue life of TC4 titanium alloy did not obey the normal distribution, and the logarithmic fatigue life obeyed normal distribution.