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Contact mechanics study of shelling under rolling contact

Conference Paper


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, semi-elliptical regions of shear mode growth were found in the Mode III tests and are though 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.

Publication Date


  • 1990

Citation


  • Hellier, A. K., Corderoy, D. J. H., & Lakeland, D. (1990). Contact mechanics study of shelling under rolling contact. In National Conference Publication - Institution of Engineers, Australia (pp. 64-69).

Scopus Eid


  • 2-s2.0-0025567686

Web Of Science Accession Number


Start Page


  • 64

End Page


  • 69

Issue


  • 90 pt 14

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, semi-elliptical regions of shear mode growth were found in the Mode III tests and are though 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.

Publication Date


  • 1990

Citation


  • Hellier, A. K., Corderoy, D. J. H., & Lakeland, D. (1990). Contact mechanics study of shelling under rolling contact. In National Conference Publication - Institution of Engineers, Australia (pp. 64-69).

Scopus Eid


  • 2-s2.0-0025567686

Web Of Science Accession Number


Start Page


  • 64

End Page


  • 69

Issue


  • 90 pt 14