Vorträge und Posterpräsentationen (mit Tagungsband-Eintrag):
H. P. Rossmanith, F. Loibnegger, R. Huber:
"Crack Path Development and Related Safety Considerations for Heavy Duty Railroad Wheels";
Vortrag: International Conference on CRACK PATH (CP 2006),
Parma (eingeladen);
14.09.2006
- 16.09.2006; in: "PROCEDINGS OF THE INTERNATIONAL CONFERENCE ON CRACK PATHS (CP 2006)",
University of Parma,
Paper No. 088
(2006).
Kurzfassung englisch:
This contribution presents a hybrid analytical-numerical analysis of the thermo-mechanical fatigue behavior of heavy duty railway wheels. The wheels were repeatedly frictionally disk-braked at random sequences of time instants. As the loading was rather severe, the stresses during braking and subsequent cooling reached the plastic limits in compression and tension, respectively. Hence, the initiation and propagation of fatigue cracks was observed. This paper addresses the behavior of these cracks under severe service conditions including residual stresses, and discusses the conditions for fatigue crack extension as well as the possibility to arrest these cracks. Finally safety issues and safe life time diagrams are presented.
Schlagworte:
Thermo-mechanical fatigue; Railway wheels; Frictionally disk-braked; life time diagram
Erstellt aus der Publikationsdatenbank der Technischen Universität Wien.