Fatigue crack growth in wheelset axles under bending and torsional loading
| Autor: | Manuela Sander, Paul Köster, R. Hannemann |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
Materials science
business.industry Mechanical Engineering Growth data Work (physics) 02 engineering and technology Bending Structural engineering Paris' law 021001 nanoscience & nanotechnology Industrial and Manufacturing Engineering Material fatigue Stress (mechanics) Axle 020303 mechanical engineering & transports 0203 mechanical engineering Mechanics of Materials Modeling and Simulation Fracture (geology) General Materials Science 0210 nano-technology business |
| Zdroj: | International Journal of Fatigue. 118:262-270 |
| ISSN: | 0142-1123 |
| DOI: | 10.1016/j.ijfatigue.2018.07.038 |
| Popis: | In the past, unexpected failures in wheelset axles lead to catastrophic consequences. To avoid those failures inspection intervals must be defined. The definition of the inspection intervals is based on fracture mechanical approaches. In the present work, the railway axle steel 34CrNiMo6 is investigated. For this material fatigue crack growth data have been experimentally determined for a range of different negative and positive stress ratios. Furthermore, the FORMAN/METTU parameters for different probabilities of survival are identified. In wheelset axles different geometry factors influence the crack growth behaviour. Therefore, different shouldered solid shafts with transition radii and a press fit seat are designed and tested under rotating bending. Moreover, the load situation also has an influence on the crack growth. The main bending load is overlapped with torsional loading at special wheel-rail-situations. With the developed mixed mode test rig, the influence of different load situations on wheelset axles are examined. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
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