時間打切り標本による3母数ワイブル分布の母数推定に関する一試案(<小特集>信頼性工学小特集)

概要

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In the previous paper, the parameter estimation was performed by several methods and the distribution characteristics of the estimated Weibull parameters were discussed in order to clarify the pattern of fiatigue life distribution of machines or structural members. From the comparison of the statistical properties of the estimates, the most preferable method to estimate Weibull parameters was selected for perfect samples. In the long life region around the fatigue limit, however, it is usually difficult to obtain the perfect samples, and non-fracture specimens often appear in the fatigue tests at these low stress levels . From this view point, formulation of fatigue life distribution was made in the present study for the population with the probability of non-fracture events, and the most preferable estimation procedure proposed in the previous study was modified to apply on the Type I censored samples. By examining the distribution characteristics of the parameter estimates obtained here, it was shown that the present method is acceptable to estimate the Weibull parameters of fatigue life distribution from the Type I censored samples at low stress levels around the fatigue limit.
社団法人日本材料学会の論文
1981-01-15