Critical stress distribution associated with nonmetallic inclusions in high-speed train wheels

Nonmetallic inclusions or their chain-like distribution could cause shattered rims, a typical rolling contact fatigue failure of train wheels. The advanced experiment and FEM simulation strategy were developed to investigate the critical stress distribution associated with nonmetallic inclusions in high-speed train wheels. It has been found that most of the inclusions in the studied high-speed wheel have a length smaller than 9 µm. Hard inclusions (Al2O3) cause a significant stress concentration at the poles, while soft inclusions (MnS) and voids trigger stress concentration at the equator. The inclusion cluster plays an essential role in stress concentration and fatigue performance. If alumina inclusions are chain-likely distributed along the radial direction of the wheel, it presents the risk for crack initiation and fatigue life reduction. Void clusters also potentially cause deep-surface damage to the train wheels.

• Record URL:
  http://www.railknowledgebank.com/Presto/pl/MTk4MTRjNDUtNWQ0My00OTBmLTllYWUtZWFjM2U2OTE0ZDY3LjEwMDg4
• Authors:
  • Tovar E
  • Zhu H
  • Deng G
  • Afridi H
  • Li H
  • Li S
  • Zhao X
  • Wei H
• 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: 7p.; 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: Railroad rails; Rolling contact; Stresses; Wear; Wheels
• ATRI Terms: Railway track; Stress; Wear; Wheel

Filing Info

• Accession Number: 01879007
• Record Type: Publication
• Source Agency: ARRB Group Limited
• Files: ATRI
• Created Date: Apr 10 2023 4:54PM