Fatigue analysis using finite element
Summary :
Table of Contents
- Abstract
- Introduction
- Fatigue strength
- Methods to determine fatigue
- Stress life (SN)
- Strain life (EN)
- Linear Elastic Fracture Mechanics (LEFM)
- An example for fatigue analysis
- Understanding fatigue analysis
- Conclusion
- References
Abstract
The definition of fatigue - failure under a repeated or otherwise varying load, which may reach a level sufficient to cause failure. The symptoms of fatigue are cracks that result from plastic deformation in localized areas. Such deformation usually results from stress concentration sites on the surface of a component, or a pre-existing, virtually undetectable, defect on or just below the surface. While it may be difficult or even impossible to model such defects in FEA, variability in materials is a constant, and small defects are very likely to exist. FEA can predict stress concentration areas, and can help design engineers predict how long their designs are likely to last before experiencing the onset of fatigue.
Keywords: fatigue, Design, finite element analysis
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