Journal of the Korean Society of Safety (한국안전학회지)

The Korean Society of Safety (한국안전학회)
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Evaluation of Fatigue Endurance for a Rocker Arm of Diesel engine

디젤 엔진 로커 암의 피로 내구성 평가

  • Kim, Ho-Kyung (Department of Automotive Engineering, Seoul National University of Technology) ;
  • Yang, Kyoung-Tak (Graduate School, Seoul National University of Technology) ;
  • Kim, Hyun-Jun (Graduate School, Seoul National University of Technology)
  • 김호경 (서울산업대학교 자동차공학과) ;
  • 양경탁 (서울산업대학교 대학원) ;
  • 김현준 (서울산업대학교 대학원)
  • Published : 2007.06.30
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Abstract

In order to evaluate fatigue endurance for the rocker arm of a diesel engine, stress measurements were performed using the strain gages attached near the neck, where is one of the most critical region in the rocker arm, in variation of the engine speed. The fatigue life experiments were carried out on miniature specimens from the rocker arms. For evaluating the fatigue endurance of the rocker arm, the S-N data were compared with the stress analysis results through FEM analysis of the rocker arm. The effective stress of the neck region was determined 17.7MPa through FEM analysis of the rocker arm. Conclusively, on the basis of fatigue limit, the rocker arm has a safety factor of 2.8 or 3.4 from the stress measurement or FEM results, respectively.

Keywords

References

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