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A finite element and fatigue threshold study of shelling in heavy haul rails

Journal Article


Abstract


  • A finite element study has been made of subsurface rail-wheel contact stresses in a heavy haul railway rail, and the near-threshold fatigue behaviour investigated for both standard carbon and head-hardened rail steels under mode II and mode III shear-loading conditions. Small, semielliptical regions of shear mode growth were found in the mode III tests and are thought to be equivalent to shell cracks. Mode I branch cracks arising from these are similarly believed to correspond to the generation of a transverse defect. Gauge corner shear stresses from the finite element analysis are used together with threshold stress intensity factor ranges from the fatigue tests on standard carbon rail in a fracture mechanics model of the transition from a shell to a transverse defect. When the effects of crack face friction and residual stress in the rail head are incorporated into the model, excellent agreement is obtained between the predicted size of a shell and that found from fractographic examinations of failed rail samples. © 1991.

Publication Date


  • 1991

Published In


Citation


  • Hellier, A. K., McGirr, M. B., & Corderoy, D. J. H. (1991). A finite element and fatigue threshold study of shelling in heavy haul rails. Wear, 144(1-2), 289-306. doi:10.1016/0043-1648(91)90021-L

Scopus Eid


  • 2-s2.0-0026142102

Start Page


  • 289

End Page


  • 306

Volume


  • 144

Issue


  • 1-2

Abstract


  • A finite element study has been made of subsurface rail-wheel contact stresses in a heavy haul railway rail, and the near-threshold fatigue behaviour investigated for both standard carbon and head-hardened rail steels under mode II and mode III shear-loading conditions. Small, semielliptical regions of shear mode growth were found in the mode III tests and are thought to be equivalent to shell cracks. Mode I branch cracks arising from these are similarly believed to correspond to the generation of a transverse defect. Gauge corner shear stresses from the finite element analysis are used together with threshold stress intensity factor ranges from the fatigue tests on standard carbon rail in a fracture mechanics model of the transition from a shell to a transverse defect. When the effects of crack face friction and residual stress in the rail head are incorporated into the model, excellent agreement is obtained between the predicted size of a shell and that found from fractographic examinations of failed rail samples. © 1991.

Publication Date


  • 1991

Published In


Citation


  • Hellier, A. K., McGirr, M. B., & Corderoy, D. J. H. (1991). A finite element and fatigue threshold study of shelling in heavy haul rails. Wear, 144(1-2), 289-306. doi:10.1016/0043-1648(91)90021-L

Scopus Eid


  • 2-s2.0-0026142102

Start Page


  • 289

End Page


  • 306

Volume


  • 144

Issue


  • 1-2