In practice, the knowledge of the fatigue properties, in addition to the static material properties, is crucial for a reliable component design. Many components are not only statically loaded, but also dynamically loaded in the area of application, such as a fastener on an airplane. In addition to the actual load carried during turbulence or takeoffs and landings, this component is subjected to a certain oscillation, which leads to peak loads. By determining SN curves, reliable statements about the relationship between the number of load cycles and the discontinued load can be determined, so that the risk of an unexpected failure of the components is drastically minimized. If plastic components are permanently loaded, e.g., such as it may be in the case of a fastener, a creep of the material will occurs. Creep designates the plastic deformation under a sustained load. This can eventually lead to the failure of the component.