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A study of multiple crack interaction at rolling contact fatigue loading of rails

Johan Tillberg (Institutionen för tillämpad mekanik, Material- och beräkningsmekanik) ; Fredrik Larsson (Institutionen för tillämpad mekanik, Material- och beräkningsmekanik) ; Kenneth Runesson (Institutionen för tillämpad mekanik, Material- och beräkningsmekanik)
Proceedings of the Institution of Mechanical Engineers, Part F, Journal of Rail and Rapid Transit (0954-4097). Vol. 223 (2009), 4, p. 319-330.
[Artikel, refereegranskad vetenskaplig]

The objective of this paper is to investigate geometric and material parameters that affect the interaction of multiple pre-existing (initiated) cracks due to rolling contact fatigue (RCF) loading conditions. In particular, the behaviour of short cracks (head checks) in railway rail is studied. Parameters of interest are initial crack angle and spacing, distribution of initial crack lengths, width of the load/contact zone, and the material properties (in particular, the friction coefficient). Furthermore, the sensitivity of the finite element (FE)-mesh density is investigated. An open question of particular interest is the effect of crack interaction, e.g. shielding, on the prevailing crack spacing. In view of all uncertainties of the material model as well as the three-dimensional geometric complexity of the RCF problem, it is important to obtain a good understanding of the sensitivity of parameter changes. This is achieved in the presented investigation, although it is carried out using simplifying assumptions such as plane strain, linear elasticity, and Hertzian pressure distribution.

Nyckelord: multiple crack interaction, rolling contact fatigue

Denna post skapades 2009-09-10. Senast ändrad 2015-06-12.
CPL Pubid: 97801


Institutioner (Chalmers)

Institutionen för tillämpad mekanik, Material- och beräkningsmekanik



Chalmers infrastruktur

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Denna publikation ingår i:

Elastic-plastic fracture mechanics - Application to rolling contact fatigue in rails