Journal of Applied Reliability (한국신뢰성학회지:신뢰성응용연구)

The Korean Reliability Society (한국신뢰성학회)
권호 표지

Finite Element Analysis of Warm Peening Process on Spring Steel for Surface Durability Improvement

스프링강 표면 내구수명 향상을 위한 온간 피닝 공정의 유한요소 해석

  • Lee, Sangwook (Department of Material Engineering, Seoul National University of Science & Technology) ;
  • Kim, Jaeyeon (Program of Materials Science & Engineering, Convergence Institute of Biomedical Engineering and Biomaterials, Seoul National University of Science and Technology) ;
  • Park, Jaiwon (Department of Non Destructive Inspection, Asea Aviation College) ;
  • Byeon, Jaiwon (Department of Material Science and Engineering, Seoul National University of Science & Technology)
  • 이상욱 (서울과학기술대학교 산업대학원 재료공학과) ;
  • 김재연 (서울과학기술대학교 의공학-바이오소재융합협동과정 신소재공학프로그램) ;
  • 박재원 (아세아 항공전문학교 비파괴검사학과) ;
  • 변재원 (서울과학기술대학교 신소재공학과)
  • Received : 2018.02.27
  • Accepted : 2018.03.16
  • Published : 2018.03.25
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Abstract

Purpose: Numerical and experimental study was performed to evaluate the effect of peening temperature on the residual compressive stress distribution and magnitude of residual compressive stress at the material surface. Methods: A compressive air-propelled warm peening equipment was designed and manufactured for warm peening test. Results: 3D dynamic finite element (FE) model of the warm peening test was proposed and validity of the proposed FE model was verified by comparing the predicted residual stresses with the measured residual stresses in the open literature. Maximum warm peening temperature and a proper peening time were investigated with the proposed FE model. Conclusion: Compressive residual stress increased remarkably with peening temperature increased. But, peening temperature is greater than $350^{\circ}C$, the effect of peening temperature disappeared. Therefore, maximum peening temperature possibly applicable for warm peening industry might be $350^{\circ}C$ and peening time is 45s.

Keywords

References

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