Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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Fatigue Strength Evaluation of Self-Piercing Riveted Al-5052 Joints

셀프 피어싱 리베팅한 Al-5052 접합부의 피로강도 평가

  • Kang, Se Hyung (Department of Automotive Engineering, Graduate School, Seoul National University of Science & Technology) ;
  • Hwang, Jae Hyun (Department of Automotive Engineering, Graduate School, Seoul National University of Science & Technology) ;
  • Kim, Ho Kyung (Department of Mechanical & Automotive Engineering, Seoul National University of Science & Technology)
  • 강세형 (서울과학기술대학교 자동차공학과 대학원) ;
  • 황재현 (서울과학기술대학교 자동차공학과 대학원) ;
  • 김호경 (서울과학기술대학교 기계.자동차공학과)
  • Received : 2014.10.21
  • Accepted : 2015.05.22
  • Published : 2015.06.30
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Abstract

Self-piercing riveting (SPR) is receiving more recognition as a possible and effective solution for joining automotive body panels and structures, particularly for aluminum parts and dissimilar parts. In this study, static strength and fatigue tests were conducted using coach-peel and cross-tension specimens with Al-5052 plates for evaluation of fatigue strength of the SPR joints. For the static experiment results, the fracture modes are classified into pull-out fracture due to influence of plastic deformation of joining area. During the fatigue tests for the coach-peel and cross-tension specimens with Al-5052, interface failure mode occurred on the top substrate close to the rivet head in the most cycle region. There were relationship between applied load amplitude $P_{amp}$ and life time of cycle N, $P_{amp}=715.5{\times}N^{-0.166}$ and $P_{amp}=1967.3{\times}N^{-0.162}$ were for the coach-peel and cross- tension specimens, respectively. The finite element analysis results for specimens were adopted for the parameters of fatigue lifetime prediction. The relation between SWT fatigue parameter and number of cycles was found to be $SWT=192.8N_f^{-0.44}$.

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References

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