한국정밀공학회지 (Journal of the Korean Society for Precision Engineering)

  • 제33권7호
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  • Pages.559-564
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  • 2016
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  • 1225-9071(pISSN)
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  • 2287-8769(eISSN)
한국정밀공학회 (Korean Society for Precision Engineering)
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압입축 접촉압력 최소화를 위한 허브 접촉부 형상 최적화

Optimal Shape Design of Hub Edge Contact Profile in a Press-Fitted Shaft

  • 최하영 (동양미래대학교 기계공학부) ;
  • 이동형 (한국철도기술연구원 피로손상연구팀) ;
  • 권석진 (한국철도기술연구원 피로손상연구팀) ;
  • 서정원 (한국철도기술연구원 피로손상연구팀)
  • Choi, Ha-Young (Department of Mechanical Engineering, Dongyang Mirae University) ;
  • Lee, Dong-Hyung (Fatigue and Fracture Research Team, Korea Railroad Research Institute) ;
  • Kwon, Seok-Jin (Fatigue and Fracture Research Team, Korea Railroad Research Institute) ;
  • Seo, Jeong-Won (Fatigue and Fracture Research Team, Korea Railroad Research Institute)
  • 투고 : 2016.05.05
  • 심사 : 2016.06.14
  • 발행 : 2016.07.01
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초록

The objectives of this paper are to develop a finite element analysis model to analyze press-fitted and bending load conditions in a press-fitted assembly, and propose a hub shape optimization method to minimize contact pressure near the shaft contact edge. Numerical asymmetric-axisymmetric finite element models have been developed to predict contact stress on press-fitted shafts. The global optimization method, genetic algorithm, local optimization method, and sequential quadratic programming were applied to a press-fitted assembly to optimize the hub contact edge geometry. The results showed that the maximum contact pressure with the optimized hub shape decreased more than 60 % compared to conventional hubs and the maximum contact stress affecting fatigue life was reduced about 47 %. Hub shape optimization can be useful to increase the load capability of press fits in terms of wear and fatigue behavior.

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참고문헌

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