Fatigue Crack Growth inside Railway Axles
If a crack is detected in a cyclic loaded component respectively his presence cannot be excluded by non-destructive testing, the remaining lifetime of this component can be estimated by the use of the fracture mechanics methods. Such task occurs during the assessment respectively the dimensioning of railway axles of vehicles in service and newly designed vehicles. Several material and operating aspects have to be taken into account, i.e.
Representative crack geometry
Variable amplitude loading
Stress concentration if the crack is located in a geometric transition region