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Fracture mechanical analysis and assessment of the extension of rolling contact fatigue cracks in railway rails

  • Rolling contact fatigue generates cracks on the running surface of high strength railway rails which grow under a small angle into the rail head. These cracks can cause in its last stage the fracturing of the rail. The crack extension behaviour is – as the origin of these cracks too – influenced by the cold working of the rail steel. The crack growth in the first stage is fracture mechanically analyzed by means of two-dimensional modelling. The simulation results are assessed for the use of railRolling contact fatigue generates cracks on the running surface of high strength railway rails which grow under a small angle into the rail head. These cracks can cause in its last stage the fracturing of the rail. The crack extension behaviour is – as the origin of these cracks too – influenced by the cold working of the rail steel. The crack growth in the first stage is fracture mechanically analyzed by means of two-dimensional modelling. The simulation results are assessed for the use of rail grinding. A criterion for the change of the crack growth direction could not be derived, but the following stages of the crack growth in the transverse direction and the final fracture and the conditions for secondary fractures are considered. Rolling contact fatigue generates cracks on the running surface of high strength railway rails which grow under a small angle into the rail head. These cracks can cause in its last stage the fracturing of the rail. The crack extension behaviour is – as the origin of these cracks too – influenced by the cold working of the rail steel. The crack growth in the first stage is fracture mechanically analyzed by means of two-dimensional modelling. The simulation results are assessed for the use of rail grinding. A criterion for the change of the crack growth direction could not be derived, but the following stages of the crack growth in the transverse direction and the final fracture and the conditions for secondary fractures are considered.show moreshow less

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Metadaten
Author:Thomas Schnitzer, Karl-Otto EdelGND
URN:urn:nbn:de:kobv:522-opus-69
Document Type:Other
Language:English
Year of Publishing:2006
Date of Publication (online):2006/12/11
Publishing Institution:Fachhochschule Brandenburg
Release Date:2006/12/11
GND Keyword:Eisenbahnschiene; Schadensmechanik
Source:International Conference on Contact Mechanics and Wear of Rail Wheel Systems <7, 2006, Brisbane>: Proceedings. - Vol. 2. - 2006. - S. 473 .- 478. - ISBN 1-876855-27-4
Institutes:Fachbereich Technik
Dewey Decimal Classification:Technik, Medizin, angewandte Wissenschaften / Ingenieurwissenschaften / Ingenieurwissenschaften und zugeordnete Tätigkeiten
open_access (DINI-Set):open_access
University Bibliography:Hochschulbibliografie
Licence (German):Keine Nutzungslizenz vergeben - es gilt das deutsche Urheberrecht
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