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Civil-Comp Proceedings
ISSN 1759-3433
CCP: 104
Edited by: J. Pombo
Paper 110

Mechanisms of Driving Surface Shear Cracks in Rolling Sliding Contact

W. Daves1,2, M. Kracalik1, W.P. Yao1 and S. Scheriau3

1Material Center Leoben Forschung GmbH, Austria
2Institute of Mechanics, Montanuniversität Leoben, Austria
3voestalpine Schienen GmbH, Leoben, Austria

Full Bibliographic Reference for this paper
W. Daves, M. Kracalik, W.P. Yao, S. Scheriau, "Mechanisms of Driving Surface Shear Cracks in Rolling Sliding Contact", in J. Pombo, (Editor), "Proceedings of the Second International Conference on Railway Technology: Research, Development and Maintenance", Civil-Comp Press, Stirlingshire, UK, Paper 110, 2014. doi:10.4203/ccp.104.110
Keywords: rail, crack, configurational force, finite element, rolling sliding.

An enhanced finite element model for surface shear cracks under rolling sliding contact is developed. Proper modelling of such cracks requires the use of the newly developed configurational force concept for the calculation of crack driving forces. This method is capable in describing incremental plasticity in the surrounding of such a crack. The numerical applicability of the configurational force concept for shear cracks under cyclic contact loading is discussed and compared with the J-integral concept. A single inclined crack in a rail loaded by an accelerated wheel is investigated. As a result of the modelled contact between wheel and rail the stick-slip effect of a rolling sliding contact is considered. Special issues are addressed as transformation of results from the three-dimensional to the two-dimensional case and the interaction of the wheel with the crack-faces in the rail. During one cycle several peaks of the crack driving force are calculated and discussed.

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