Abstract: This paper deals with the fatigue testing results by the method of statistical inference. Firstly, the fatigub life distributions and the P-S-N curve equations are estimated. Secondly, the fatigue strength data corresponding to given fatigue lives are deduced by using the P-S-N curve equations. Finally, the fatigue strength probability distribution is inferred. This paper gives three examples, their results of statistical inference are not the same as the theoretical distributions deduced from the distributions of fatigue life being assumed. While the distribution of fatigue strength probability distributions cannot reject Weibull distribution as well. On the other hand, when fatigue life distributions are neither the two-parameter log-normal nor the three-parameter WeibulJ distribution, the fatigue strength data can still be described as three-parameter Weibull.

Key words: fatigue strength, statistical inference, hypothesis testing, significance level, sample