대한기계학회논문집A (Transactions of the Korean Society of Mechanical Engineers A)

  • 제30권5호
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  • Pages.505-511
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  • 2006
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  • 1226-4873(pISSN)
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  • 2288-5226(eISSN)
대한기계학회 (The Korean Society of Mechanical Engineers)
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압력과 모멘트의 복합하중을 받는 곡관에 대한 유한요소 한계하중 해석

Limit Loads for Pipe Bends under Combined Pressure and in-Plane Bending Based on Finite Element Limit Analysis

  • 오창식 (고려대학교 대학원 기계공학과) ;
  • 김윤재 (고려대학교 기계공학과)
  • 발행 : 2006.05.01
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초록

In the present paper, approximate plastic limit load solutions fur pipe bends under combined internal pressure and bending are obtained from detailed three-dimensional (3-D) FE limit analyses based on elastic-perfectly plastic materials with the small geometry change option. The present FE results show that existing limit load solutions for pipe bends are lower bounds but can be very different from the present FE results in some cases, particularly for bending. Accordingly closed-form approximations are proposed for pipe bends under combined pressure and in-plane bending based on the present FE results. The proposed limit load solutions would be a basis of defective pipe bends and be useful to estimate non-linear fracture mechanics parameters based on the reference stress approach.

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참고문헌

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