Probabilistic fatigue life curve of ultra-high strength sucker rods based on a three-parameter Weibull distribution model

被引：0
作者：
Cai W. [1 ]
Li W. [2 ]
Xu Y. [1 ]
机构：
[1] School of Petroleum Engineering, Xi̍an Shiyou University, Xi'an
[2] Xinjiang Oilfield Company, PetroChina, Karamay
来源：
Zhongguo Shiyou Daxue Xuebao (Ziran Kexue Ban)/Journal of China University of Petroleum (Edition of Natural Science) | 2022年 / 46卷 / 04期
关键词：
fatigue life; probabilistic fatigue life curve; three-parameter Weibull distribution; ultra high strength sucker rod;
D O I：
10.3969/j.issn.1673-5005.2022.04.009
中图分类号：
学科分类号：
摘要：
In this study, the fatigue data of HL and HY ultra-high strength sucker rods were obtained by fatigue testing, and a new fatigue life prediction model of the sucker rod was established by using a three-parameter Weibull distribution method, and then the probabilistic fatigue life curve of the HL and HY super-high strength sucker rods were figured out. The predicted fatigue life using the new three-parameter Weibull distribution model was compared with the normal distribution Basquin model based on the experimental data. The results show that the errors of the fatigue life of the HL and HY types sucker rods calculated by the new model in comparison with the experimental data are 1. 25% and 4. 39%, respectively, while the errors of the Basquin model are 12. 50% and 19. 84%. The high accuracy of the new model based on the Weibull distribution has been verified. © 2022 University of Petroleum, China. All rights reserved.
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页码：79 / 85
页数：6
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