Investigations on crack propagation in wheelset axles under rotating bending and mixed mode loading
| Autor: | Robert Hannemann, Paul Köster, Manuela Sander |
|---|---|
| Rok vydání: | 2017 |
| Předmět: |
Engineering
business.industry Fracture mechanics 02 engineering and technology Structural engineering Bending Paris' law 021001 nanoscience & nanotechnology Mixed mode Stress (mechanics) Crack closure Axle 020303 mechanical engineering & transports 0203 mechanical engineering Fracture (geology) 0210 nano-technology business Earth-Surface Processes |
| Zdroj: | Procedia Structural Integrity. 5:861-868 |
| ISSN: | 2452-3216 |
| DOI: | 10.1016/j.prostr.2017.07.104 |
| Popis: | Failures in wheelset axles can lead to catastrophic consequences. In order to prevent unexpected failures, inspection intervals must be defined based on fracture mechanical approaches. For the railway axle steel 34CrNiMo6 fatigue crack growth data have been experimentally determined for a range of different negative stress ratios and the FORMAN/METTU parameters for different probabilities of survival are identified. For the investigation of the influence of the transition radii on the crack growth behavior, different shouldered solid shafts are designed and tested under rotating bending load. Moreover, at special wheel rail situations the bending load is overlapped with torsional loading. Hence, to examine this influence on the fatigue crack growth in wheelset axles a test rig for mixed mode load situations has been developed. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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