Proceedings of the KSME Conference (대한기계학회:학술대회논문집)

The Korean Society of Mechanical Engineers (대한기계학회)
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3-D Finite Element Stress Analysis for Fatigue Design and Evaluation;A Parametric Study of MOV(Motor Operated Valve)

피로설계 및 평가를 위한 3차원 유한요소 응력해석에 관한 고찰;모터구동밸브를 이용한 사례연구

  • 김형근 (성균관대학교 일반대학원 기계설계학과) ;
  • 이상민 (성균관대학교 기계공학부) ;
  • 장윤석 (성균관대학교 기계공학부) ;
  • 최재붕 (성균관대학교 기계공학부) ;
  • 김영진 (성균관대학교 기계공학부) ;
  • 김윤재 (고려대학교 기계공학부)
  • Published : 2004.11.03
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Abstract

In this paper, a new procedure is proposed to accomplish the primary plus secondary stress(P+Q) at the 'structural element' instead of 'transition element'. For the P+Q evaluation, the calculated stresses by FEA are linearized along a stress classification line to extract the stress category, then the stress intensity is calculated to compare with the $3S_{m}$ limit. Also, in this paper, the 'design by analysis' criteria, adopted fundamental concepts and a new approach to calculate $K_{e}$ factors are explained. The new procedure combined with 3-D FEA has been applied to motor operated valve in order to the over conservatism and the rack of margin. The evaluation results show a good applicability and can be utilized for fatigue life evaluation by using P+Q.

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