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

  • 제32권12호
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  • Pages.1123-1131
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  • 2008
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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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열하중 및 기계하중이 작용하는 원주 방향 균열 배관에 대한 V-계수 평가

V-Factor Estimation Under Thermal and Mechanical Stress for Circumferentially Cracked Cylinder

  • 발행 : 2008.12.01
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초록

This paper provides V-factor estimation under combined mechanical and thermal load for circumferential cracks. Results are based on finite element analyses and effect of types and magnitudes of the thermal stress, crack geometry, the loading mode and plastic strain hardening on variations of the V-factor are investigated. The results of finite element analyses are compared with R6 values. As a result, it is shown that R6 gives generally conservative results. The conservatism is especially increased for the combination of large mechanical and thermal load. As a result, new estimation method which uses failure assessment line in R6 is proposed for V-factor and gives less conservative results.

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참고문헌

  1. Ainsworth, R.A., “The Treatment of Thermal and Residual stresses in Fracture Assessments,” Engineering Fracture Mechanics, Vol. 24, pp. 65-76, 1986 https://doi.org/10.1016/0013-7944(86)90008-1
  2. Anderson, T.L., 2005, Fracture Mechanics-Fundamentals and Applications-$3^{rd}$ edition, CRC press (ch. 9)
  3. Mirzaee-Sisan, A., Truman, C.E., Smith, D.J. and Smith, M.C, 2007, “Interaction of Residual Stress with Mechanical Loading in a Ferritic Steel,” Engineering Fracture Mechanics, Vol. 74, pp. 2864-2880 https://doi.org/10.1016/j.engfracmech.2006.12.033
  4. R6, Revision 4 : Assessment of the Integrity of Structures Containing Defects, British Energy Generation Ltd, 2006
  5. Stacey, A., Barthelemy, J.-Y. and Leggatt, R.H., “Ainsworth, R.A., 2000, “Incorporation of Residual Stresses into the SINTAP Defect Assessment Procedure,” Engineering Fracture Mechanics, Vol. 67, pp. 573-611 https://doi.org/10.1016/S0013-7944(00)00075-8
  6. Ainsworth, R.A. and Hooton, D.G., 2008, “R6 and R5 Procedures : The Way Forward,” Int. J. of Pres. Ves. and Piping, Vol. 85, pp. 175-182 https://doi.org/10.1016/j.ijpvp.2007.10.003
  7. Ainsworth, R.A., Sharples, J. K. and Smith, S.D., 2000, “Effects of Residual Stresses on Fracture Behavior-Experimental Results and Assessment Methods,” Journal of Strain Analysis, Vol. 35, No.4, pp. 307-315 https://doi.org/10.1243/0309324001514431
  8. Kim, Y. J., Huh, N.S. and Kim, Y, J., 2001, “Defect Assessment Method for Welded Structures Based on Failure Assessment Diagram,” Journal of Korean Welding Society, Vol. 19, pp. 466-473
  9. Song, T. K., Oh, C. K., Kim, Y. J., Kim, J. S. and Jin, T. E., 2007, “Elastic-Plastic Fracture Mechanics Analyses for Circumferential Part-Through Surface Cracks at the Interface Between Elbows and Pipes,” Trans. of the KSME(A), Vol. 31, No.6, pp. 710-717 https://doi.org/10.3795/KSME-A.2007.31.6.710

피인용 문헌

  1. Estimation of C(t) -Integral Under Transient Creep Conditions for a Cracked Pipe Subjected to Combined Mechanical and Thermal Loads Depending on Loading Conditions vol.35, pp.6, 2011, https://doi.org/10.3795/KSME-A.2011.35.6.609
  2. Estimations of the C(t)-Integral in Transient Creep Condition for Pipe with Crack Under Combined Mechanical and Thermal Stress (I) - Elastic-Creep - vol.33, pp.9, 2009, https://doi.org/10.3795/KSME-A.2009.33.9.949
  3. Estimation of C(t)-Integral in Transient Creep Condition for Pipe with Crack Under Combined Mechanical and Thermal Stress (II) - Elastic-Plastic-Creep - vol.33, pp.10, 2009, https://doi.org/10.3795/KSME-A.2009.33.10.1065