Determination of fatigue life for low probability of failure for different stress levels using 3-parameter Weibull distribution

被引:58
作者
Strzelecki, Przemyslaw [1 ]
机构
[1] Univ Sci & Technol Bydgoszcz, Fac Mech Engn, Al Prof S Kaliskiego 7, PL-85796 Bydgoszcz, Poland
关键词
High-cycles fatigue; S-N curve; Scatter of fatigue tests; Weibull distribution; S-N CURVES; HIGH-CYCLE FATIGUE; EXPERIMENTAL-VERIFICATION; STEEL; MODELS; SCATTER;
D O I
10.1016/j.ijfatigue.2020.106080
中图分类号
TH [机械、仪表工业];
学科分类号
0802 ;
摘要
This paper presents proposed characteristics of the S-N curve using the 2 and 3-parameter Weibull distribution for fatigue limit and limited life respectively. The parameters of the proposed model are estimated using the maximum likelihood method. Additionally, it has presented a method to estimate initial values for the likelihood function. Two applications are presented, whose S-N curves were characterized by using the results for rotary bending of 5355J2 + C and C45 + C steels. The proposed S-N curves can be used to determine the fatigue life for low probability of failure, e.g. 1%, which is not recommended by ASTM E-739-91, when using a normal distribution.
引用
收藏
页数:7
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