Mechanisms of squat initiation in a rail-wheel contact

This work investigates possible parameters governing the squat initiation from a mechanical point of view. From a detailed analysis of a rail sample having squat-type crack in the initial stage of development (Fig. 1) it turned out that the crack started to grow first in the direction perpendicular to the rail traffic direction, that is, in a transverse plane. Therefore, the ability of a crack to grow transversally across the rail profile has been analyzed in a finite element model. A rail cross section is built up and a pre-crack is introduced in the model. Using the configurational force theory, the crack driving forces and their directions are determined at the pre-crack tip across different loading events.

• Record URL:
  http://www.railknowledgebank.com/Presto/pl/MTk4MTRjNDUtNWQ0My00OTBmLTllYWUtZWFjM2U2OTE0ZDY3LjEwMDEy
• Authors:
  • Baltic S
  • Daves W
• Conference:
  • 12th International Conference on Contact Mechanics and Wear of Rail/Wheel Systems, 4-7 September 2022, Melbourne, Victoria, Australia
• Publication Date: 2022

Media Info

• Pagination: 2p. ; PDF
• Monograph Title: 12th International conference on contact mechanics and wear of rail/wheel systems (CM2022): advancing the science and practice of the wheel/rail interface to improve railway operation efficiency

Subject/Index Terms

• TRT Terms: Cracking; Rolling contact; Wheels
• ATRI Terms: Cracking; Wheel

Filing Info

• Accession Number: 01878924
• Record Type: Publication
• Source Agency: ARRB Group Limited
• Files: ATRI
• Created Date: Apr 10 2023 4:53PM