Journal of Ocean Engineering and Technology (한국해양공학회지)

Korean Society of Ocean Engineers (한국해양공학회)
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Effect of Shot-peening on Fatigue Crack Growth

균열진전에 대한 쇼트피닝 효과

  • SHIM DONG-SUK (Department of Automobile, Kyonggi Institute of Technology) ;
  • LEE SEUNG-HO (Department of Automobile, Kyonggi Institute of Technology) ;
  • LEE MYUNG-HO (Department of Mechanical Eng, Seoul National Polytechnic University Siheung)
  • 심동석 (경기공업대학 자동차과) ;
  • 이승호 (경기공업대학 자동차과) ;
  • 이명호 (서울산업대학교 기계공학부)
  • Published : 2004.12.01
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Abstract

In this study, to investigate the effects of shot peening on crack growth behavior, crack growth tests are conducted on spring steels and shot peened cracks. The probabilistic crack growth equation, which can represemt the sigmoidal crack growth behavior as recently reported by Kim and Shim, is used to evaluate the experimental results. The results show that fatigue cracks grows slower in the shot peened specimen than in the unpeened and, due to the compressive residual stress occurring on the specimen surface. In the case of the shot peened specimen, the initial stress intensity factor range and the fracture toughness is higher than the non-peened specimen because the compressive residual stress affects crack growth and fracture of the specimen.

Keywords

References

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