Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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Residual Stress Analysis of Repair Welded Rail Using the ABAQUS User Subroutine

ABAQUS 서브루틴을 이용한 레일 보수용접 잔류응력 해석

  • Kim, Dong Wook (Department of Railway System Engineering, University of Science and Technology) ;
  • Jun, Hyun Kyu (Fatigue and Fracture Research Team, Korea Railroad Research Institute) ;
  • Lee, Sang Hwan (Department of Nuclear Engineering, Kyung Hee University) ;
  • Chang, Yoon Suk (Department of Nuclear Engineering, Kyung Hee University)
  • 김동욱 (과학기술연합대학원대학교 철도시스템공학과) ;
  • 전현규 (한국철도기술연구원 피로손상연구팀) ;
  • 이상환 (경희대학교 원자력공학과) ;
  • 장윤석 (경희대학교 원자력공학과)
  • Received : 2016.04.28
  • Accepted : 2016.06.20
  • Published : 2016.07.01
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Abstract

Reduction of welding residual stress is very important in the railway industry, but calculating its distribution in structures is difficult because welding residual stress formation is influenced by various parameters. In this study, we developed a finite element model for simulating the repair welding process to recover a surface damaged rail, and conducted a series of parametric studies while varying the cooling rate and the duration of post weld heat treatment (PWHT) to find the best conditions for reducing welding residual stress level. This paper presents a three-dimensional model of the repair welding process considering the phase transformation effect implemented by the ABAQUS user subroutine, and the results of parametric studies with various cooling rates and PWHT durations. We found that heat treatment significantly reduced the residual stress on the upper rail by about 170 MPa.

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References

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