Influence of the Elastoplastic Strain on Fatigue Durability Determined with the Use of the Spectral Method
Abstract
:1. Introduction
2. Materials and Methods
3. Results
4. Discussion
5. Conclusions and Observations
- An algorithm for taking into account the elastoplastic strain in the process of fatigue life assessment with the use of spectral method is presented.
- In order to use the proposed correction, we need to use the Neuber hyperbola to obtain the values corresponding to the elastic stress amplitudes obtained during the probability density calculation and their corresponding elastoplastic stress amplitudes.
- Correction due to elastoplastic stress is successfully applied to determine fatigue life in combination with all four distribution models.
- In the case of no correction, in terms of elastoplastic strain, we obtain overestimated fatigue calculation results.
- Comparison of experimental and computational durability with correction shows that calculations are within a safe scatter band of 3.
- All models used to calculate the probability density function enable obtaining results in the desired scatter band, and the computation results are on the safe side, as they do not overestimate the experimental results.
Author Contributions
Funding
Conflicts of Interest
References
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Rm MPa | Re MPa | E GPa | υ |
---|---|---|---|
750 | 515 | 200 | 0.29 |
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Böhm, M.; Kowalski, M.; Niesłony, A. Influence of the Elastoplastic Strain on Fatigue Durability Determined with the Use of the Spectral Method. Materials 2020, 13, 423. https://doi.org/10.3390/ma13020423
Böhm M, Kowalski M, Niesłony A. Influence of the Elastoplastic Strain on Fatigue Durability Determined with the Use of the Spectral Method. Materials. 2020; 13(2):423. https://doi.org/10.3390/ma13020423
Chicago/Turabian StyleBöhm, Michał, Mateusz Kowalski, and Adam Niesłony. 2020. "Influence of the Elastoplastic Strain on Fatigue Durability Determined with the Use of the Spectral Method" Materials 13, no. 2: 423. https://doi.org/10.3390/ma13020423