About this Abstract |
Meeting |
2020 TMS Annual Meeting & Exhibition
|
Symposium
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Fatigue in Materials: Fundamentals, Multiscale Characterizations and Computational Modeling
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Presentation Title |
Variable Amplitude Fatigue Analysis Through an Approach based in the Equivalent Number of Cycles |
Author(s) |
Hernan Pinto, Paola Moraga, Matias Valenzuela, Alvaro Pena, Jose Garcia |
On-Site Speaker (Planned) |
Hernan Pinto |
Abstract Scope |
Nowadays, for constant strain or stress amplitude, several researches have proposed different fatigue analysis models based on different mechanical, mathematical and statistical considerations; being the constant strain or stress amplitude fatigue analysis well covered, providing a good modeling of fatigue life and fatigue life predictions.
Regarding variable amplitude analysis, the Palmgren - Miner rule it is the most used and commonly accepted for analyze variable amplitude, nevertheless, several researchers continue studying and proposing new models and approaches to deal with fatigue under variable stress or strain amplitudes.
In this research, an approach to analyze the fatigue behavior under variable strain amplitude is proposed. The model arises from a well known and established statistical fatigue analysis model (The Weibull Strain Fatigue model), considers the application of isoprobability curves and introduce the concept of equivalent number of cycles. Finally the model is validated using previous existing variable amplitude fatigue data. |
Proceedings Inclusion? |
Planned: Supplemental Proceedings volume |