Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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Tensile-Shear Fatigue Strength of Self-Piercing Rivets Joining Dissimilar Metal Sheets

이종재료 Self-Piercing Rivets 접합부의 인장-전단 피로강도

  • Kang, Se Hyung (Dept. of Automotive Engineering, Graduate School, Seoul National University of Science & Technology) ;
  • Kim, Taek Young (Dept. of Automotive Engineering, Graduate School, Seoul National University of Science & Technology) ;
  • Oh, Man Jin (Graduate School of NID Fusion Technology, Seoul National University of Science and Technology) ;
  • Kim, Ho Kyung (Dept. of Mechanical & Automotive Eng. Seoul National University of Science & Technology)
  • 강세형 (서울과학기술대학교 자동차공학과 대학원) ;
  • 김택영 (서울과학기술대학교 자동차공학과 대학원) ;
  • 오만진 (서울과학기술대학교 NID 융합대학원) ;
  • 김호경 (서울과학기술대학교 기계.자동차공학과)
  • Received : 2014.12.16
  • Accepted : 2015.05.19
  • Published : 2015.08.31
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Abstract

Self-piercing riveting (SPR) process is gaining popularity due to its many advantages. The SPR does not require a pre-drilled hole and has capability to join a wide range of similar or dissimilar materials and combinations of materials. This study investigated the fatigue strength of self-piercing rivet joint with aluminum alloy (Al-5052) and steel (SPCC) sheets. Static and fatigue tests on tensile-shear specimens were conducted. From the static strength aspect, the optimal punching force for the specimen with upper SPCC (U.S) sheet and lower aluminum alloy(L.A) sheets was 34 kN. During static test the specimens fractured in pull-out fracture mode due to influence of plastic deformation of joining area. There was a relationship between applied load amplitude $P_{amp}$ and number of cycles N ; $P_{amp}=19588N_f^{-0.211}$ and $P_{amp}=4885N_f^{-0.083}$ for U.S-L.A and U.A-L.S specimens, respectively. U.A-L.S fatigue specimens failed due to fretting crack initiation around the rivet neck between upper and lower sheets.

Keywords

References

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