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Fracture Behavior Estimation for Circumferential Surface Cracked Pipes (ll) - Finite Element Validation -

배관에 존재하는 원주방향 표면균열에 대한 파괴거동 해석 (ll) - 유한요소해석을 통한 검증 -

  • Published : 2002.01.01

Abstract

This paper provides validations of the reference stress based J and $C^{*}$ estimations, proposed in Part I, for inner, circumferential surface cracked pipes under internal pressure and global bending against detailed 3-D elastic-plastic and elastic-creep FE results. For this purpose, actual tensile properties of two typical stainless steels (TP304 and TP316) are used for elastic-plastic FE analyses and two realistic creep laws are used for elastic-creep FE analyses. For a total of twenty cases considered in this paper, agreements between the proposed reference stress based J and $C^{*}$ estimations and the FE results are excellent. More important aspect of the proposed estimations is that they can be used to estimate J and $C^{*}$ not only at the deepest point of the surface crack but also at an arbitrary point along the crack front.front.

Keywords

Circumferential Cracked Pipe;$C^*$ Estimation;Finite Element Analysis;GE/EPRl Approach;J Estimation;Reference Stress Approach;Surface Crack

References

  1. SINTAP, 1999, SINTAP Final Procedure: Structural Integrity Assessment Procedures for European Industry, Project number BE-1426, Contract number BRPR-CT95-0024
  2. Y-J Kim, N-S Huh and Y-J Kim, 2001, 'Quantification of Pressure-Induced Hoop Stress Effect on Fracture Analysis of Circumferential Though-Wall Cracked Pipes,' Accepted for publication to Engineering Fracture Mechanics
  3. R6, 1999, R6: Assessment of the Integtity of Structures Containing Defects, Revision 3, Amendment 10, British Energy
  4. R5, 1998, R5: Assessment Procedure for the High Temperature Response of Structure, Issue 2, British Energy
  5. API, 2000, Fitness-for-Service Recommended Practice 579, First Edition, American Petroleum Institute
  6. Kumar, V. and German, M.D., 1998, Elastic-Plastic Fracture Analysis of Though-Wall and Surface Flaws in Cylinders, ERRI Report, NP-5596
  7. Zahoor, A., 1991, Ductile Fracture Handbook, Novotech Corp. 3 Volumes
  8. R66, 1999, AGR Materials Data Handbook, Issue 5, C D Hamm (ed.), British Energy Generation Ltd.
  9. RCC-MR, 1985, Design and Construction Rules for Mechanical Components of FBR Nuclear Islands, AFCEN, Paris
  10. 김진수, 김윤재, 김영진, '일반 크리프 거동을 고려한 균열 구조물의 C*- 적분 공학적 계산식,' 대한기계학회 논문집, 심사중
  11. Pipe Fracture Encyclopedia, 1997, Volume 1: Computer Program to Calculate Ramberg-Osgood Parameters for a Stress-Strain Curve, Battele
  12. ABAQUS, 1998, ABAQUS Standard/User's Manual, Version 5.8-1, Hibbit Karlsson & Sorensen, Inc., Pawtucket, RI. USA US
  13. 김영진, 석창성, 전현규, 최영환, 이정배, 1996, '원자력 배관 건전성 평가 전문가 시스템 개발 I -평가법 제시 및 재료 물성치 추론,' 대한기계학회 논문집 A 권 제 20 권 제 2 호, pp. 575-584
  14. Landes, J.D. and Begley, J.A., 1976, 'A Fracture Mechanics Approach to Creep Crack Growth,' Mechanics of Crack Growth, ASTM STP 590, pp. 695-700
  15. 김진수, 김윤재, 김영진, '배관에 존재하는 원주방향 표면균열에 대한 파괴거동해석: (I)-J-적분 예측식-,' 대한기계학회 논문집 A 권, 제 26 권 1 호, pp. 131-138 https://doi.org/10.3795/KSME-A.2002.26.1.131
  16. Miller, A.G., 1988, 'Review of Limit Loads of Structures Containing Defects,' International Journal of Pressure Vessels and Piping, Vol. 32, pp. 191-327 https://doi.org/10.1016/0308-0161(88)90073-7