Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Evaluation of Residual Stress for Freight Car Wheel due to Wear and Brake Application

마모와 제동에 의한 화차륜의 잔류응력 변화

  • Kwon, Seok Jin (New Transportation Systems Research Center, Korea Railroad Research Institute) ;
  • Seo, Jung Won (New Transportation Systems Research Center, Korea Railroad Research Institute) ;
  • Kim, Min Soo (Metropolitan Transportation Systems Research Center, Korea Railroad Research Institute)
  • 권석진 (한국철도기술연구원 신교통연구본부) ;
  • 서정원 (한국철도기술연구원 신교통연구본부) ;
  • 김민수 (한국철도기술연구원 광역도시교통연구본부)
  • Received : 2016.05.02
  • Accepted : 2016.06.21
  • Published : 2016.07.01
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Abstract

During the past few years, several incidents of freight car wheel failure during operation have occurred due to fatigue crack and overheating from braking. Tensile residual stress on the wheel tread creates an environment conducive to the formation of thermal cracks that may threaten the safety of train operations. It is important to investigate the residual stress on wheels in order to prevent derailment. In the present paper, the residual stress on wheels is measured using the x-ray diffraction system and the residual stress is analyzed using FEM. The result shows that the residual stress on the wheel rim is lower than that on the wheel tread center and the stress on over-braked wheels changes from compression residual stress to tensile residual stress.

Keywords

References

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