Bewertung der Rissausbreitung an Federstellen in Zungenschienen

Budnitzki, Grigori; Edel, Karl-Otto; Schumann, Lars

doi:10.3139/120.100604

Cited by 2 publications

(2 citation statements)

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“…[101][102][103][104]). Besides the transverse crack geometries shown in Figure 55, further crack configurations such as web cracks induced by bolt holes and weldments, vertical axial rail head cracks (splits) and cracks in switches have been investigated as well [105][106][107][108][109][110][111]. No detailed discussion of the various analyses listed above will be given here.…”

Section: Final Crack Propagationmentioning

confidence: 99%

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Introduction to the damage tolerance behaviour of railway rails – a review

Zerbst¹,

Lundén

Edel

et al. 2009

Engineering Fracture Mechanics

170

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Despite substantial advantages in material development and in periodic non-destructive inspection together with periodic grinding and other measures in order to guarantee safe service, fatigue crack propagation and fracture is still in great demand as emphasised by the present special issue. Rails, as the heart of the railway system, are subjected to very high service loads and harsh environmental conditions. Since any potential rail breakage includes the risk of catastrophic derailment of vehicles, it is of paramount interest to avoid such a scenario. The aim of the present paper is to introduce the most important questions regarding crack propagation and fracture of rails. These include the loading conditions: contact forces from the wheel and thermal stresses due to restrained elongation of continuously welded rails together with residual stresses from manufacturing and welding in the field, which is discussed in Section 2. Section 3 provides an overview of crack-type rail defects and potential failure scenarios. Finally the stages of crack propagation from initiation up to final breakage are discussed.

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