Journal of the Korean Society for Precision Engineering (한국정밀공학회지)

Korean Society for Precision Engineering (한국정밀공학회)
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The Finite Element Analysis of the Mandrel Shape's Influence on the Residual Stress Distribution by Cold Expansion Method

형상봉의 모양이 홀확장 잔류응력 분포에 미치는 영향에 대한 유한요소해석

  • 장재순 (성균관대학교 기계공학과) ;
  • 조명래 (인덕대학 컴퓨터응용설계) ;
  • 양원호 (성균관대학교 기계공학과)
  • Published : 2006.09.01
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Abstract

Cold expansion method is used to protect a fatigue fracture from fastener hole in the structure and aerospace industry. Cold expansion is that an oversized tapered mandrel goes through the hole and produces a compressive residual stress as well as plastic deformation around the hole. Here, mandrel shapes are one of the factors which are influenced on the residual stress distribution by cold expansion method. This paper, according to mandrel shapes (diameter of mandrel, length of mandrel and length of taper), we are performed a finite element analysis of residual stress distribution by cold expansion method. From this study, it has been found that diameter of mandrel and length of taper are an important factor which was generated a low compressive residual stress surround of fastener hole by cold expansion method.

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References

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