Probabilistic Estimation of Fatigue Strength for Axial and Bending Loading in High-Cycle Fatigue

Tomasz Tomaszewski, Przemysław Strzelecki, Adam Mazurkiewicz, Janusz Musiał
2020 Materials  
In this paper, the sensitivity to the type of loads (axial and bending loading) of selected construction materials (AW6063 T6 aluminum alloy, S355J2+C structural steel, and 1.4301 acid-resistant steel) in high-cycle fatigue was verified. The obtained S-N fatigue characteristics were described by a probabilistic model of the 3-parameters Weibull cumulative distribution function. The main area of research concerned the correct implementation of the weakest link theory model. The theory is based
more » ... e theory is based on a highly-stressed surface area and a highly-stressed volume in the region of the highest stresses. For this purpose, an analytical model and a numerical model based on the finite element method were used. The model that gives the lowest error implemented in specific test conditions was determined on the basis of high-cycle fatigue analysis. For the analyzed materials, it was a highly-stressed volume model based on the weakest link theory.
doi:10.3390/ma13051148 pmid:32150873 fatcat:fzqntqb7mvg6rk73kkjcfvswje