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ARTICLE
Method for Determining the S-N curve for a Low Probability of Failure
1
Faculty of Mechanical Engineering, Bydgoszcz University of Science and Technology, Poland
Submission date: 2023-12-08
Final revision date: 2024-04-15
Acceptance date: 2024-09-25
Online publication date: 2024-10-01
Corresponding author
Przemysław Strzelecki
Faculty of Mechanical Engineering, Bydgoszcz University of Science and Technology, Bydgoszcz, Poland
Faculty of Mechanical Engineering, Bydgoszcz University of Science and Technology, Bydgoszcz, Poland
KEYWORDS
TOPICS
ABSTRACT
This paper presents a new method for determining the S-N curve for a low probability of failure, e.g., 5%. To apply this method, only eight fatigue tests are needed, which is fewer than standard methods require. This could be achieved because the standard deviation, which is necessary for estimating the normal distribution of fatigue life, was derived from the distribution of the yield strength. Verification of the method was performed for fatigue tests. The results showed that the proposed method gives fatigue strength for 5% probability more reliable fatigue life than the S-N curve estimated acc. to ASTM E–739–10.
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