The term fatigue strength comes from materials science. It describes the deformation and failure behavior of an oscillating (dynamically) loaded material for a defined number of cycles. Especially at heavily used compression springs it is important to record the fatigue
Fatigue strength
![Fatigue strength Wöhler curve, Wöhler line, Wöhler diagram](https://blog.federnshop.com/wp-content/uploads/Wöhlerkurve-750x350.jpg)