Finite Element Analysis of Re-Cold Expansion in Order to Improve the Fatigue Life of Fastener Hole that has been Cold Expanded Before

홀확장법을 적용한 체결홀의 피로수명 개선을 위한 재 홀확장 효과에 대한 유한요소 해석

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


Cold expansion of fastener holes has been successfully used for many years to impart beneficial compressive residual stresses. Beneficial compressive residual stress of fastener hole that has been cold expanded before is reduced by using of materials for a long time. As a result, fatigue life of material is reduced. So, compressive residual stresses of material have to regenerate by re-cold expansion method. In this paper, it was carried out a finite element analysis about variation of residual stress due to tensile stress and residual stress distribution that was regenerated by re-cold expansion method in the fastener hole. Here, a diversity tensile stress was used. Also, it was performed a finite element analysis according to cold expansion rate of re cold expansion in order to obtain a beneficial compressive residual stress.


Re Cold Expansion;Fatigue Life;Finite Element Analysis;Residual Stress


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