Measurement Uncertainty Evaluation on Fatigue Testing Results

The major sources of measurement uncertainty of fatigue testing results were analyzed. By adopting evaluation method of uncertainty transfer law (GUM method) and combined with the results of rotating bending fatigue testing, the measurement uncertainty evaluation procedure and results of fatigue life under given stress determined by group method and fatigue strength under given fatigue life determined by up-and-down method were given. The results show that GUM method can be used to evaluate the measurement uncertainty of the results of rotating bending fatigue testing. The group method and the up-and-down method are main methods to determine the fatigue life and fatigue strength, and the evaluation method introduced in this paper has a certain reference value for evaluation of the measurement uncertainty on other fatigue testing results.