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

  • 제26권11호
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  • Pages.2442-2449
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  • 2002
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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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실린더에 존재하는 축방향 표면균열에 대한 공학적 J-적분식 (II) - 최적참조응력에 기초한 방법-

Engineering J-Integral Estimation for Internal Axial Surface Cracks in Cylinders (II) -Optimised Reference Stress Based Estimation-

  • 김진수 (성균관대학교 기계공학부) ;
  • 김윤재 (성균관대학교 기계공학부) ;
  • 김영진 (성균관대학교 기계공학부)
  • 발행 : 2002.11.01
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초록

This paper provides an reference stress based J estimation equation fur cylinders with finite internal axial surface cracks under internal pressure. In part 1, the J estimation equation based on deformation plasticity using Ramberg-Osgood (R-0) materials is proposed. In this paper, the developed CE/EPRI -type solutions ale then re-formulated based on the reference stress concept. Such a re-formulation provides a simpler equation for J. estimation are then further extended to combined internal pressure and bending. The proposed reference stress based J estimation equation is compared with elastic-plastic 3-D FE results using actual stress-strain data for a Type 304 stainless steel. Good agreement between the FE results and the proposed reference stress based J estimations provides confidence in the use of the proposed method to elastic -plastic fracture mechanics of pressurised piping.

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참고문헌

  1. Kim, J.S., Kim, Y.J., Park, Y.J. and Kim, Y.J., 2002. 'Engineering J-Integral Estimation for Internal Axial Surface Cracks in Cylinder (I)-Deformation Plasticity Based Estimation-,' Transactions of the KSME, A, Vol. 26, No.8, pp. 1672-1679 https://doi.org/10.3795/KSME-A.2002.26.8.1672
  2. Kumar, V. and German, M.D., 1988, Elastic-Plastic Fracture Analysis of Through- Wall and Surface Flaws in Cylinders, EPRI Report, NP-5596
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  5. Kim, Y.J., Huh, N.S. and Kim, Y.J., 2001, 'Enhanced Reference Stress Based J and COD Estimation Method for LBB Analysis and Comparison with GE/EPRI Method,' Fatigue and Fracture of Engineering Materials and Structures, Vol. 24, pp. 243-254 https://doi.org/10.1046/j.1460-2695.2001.00388.x
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  13. Kiefner, J.F., Maxey, W.A., Eiber, R.J. and Duffy, A.R., 1973, 'Failure Stress Levels of Flaws in Pressurised Cylinders,' in Progress in Flaw Growth and Fracture Toughness Testing, ASTM STP 536, pp. 461-81
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