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

The Korean Society of Mechanical Engineers (대한기계학회)
권호 표지
DOI QR코드

DOI QR Code

Engineering J-Integral Estimation for Internal Axial Surface Cracks in Cylinders (I) -Deformation Plasticity Based Estimation-

실린더에 존재하는 축방향 표면균열에 대한 공학적 J-적분식 (I) - 변형소성에 기초한 방법-

  • Kim, Jin-Su (Dept.of Mechanical Engineering, Sungkyunkwan University) ;
  • Kim, Yun-Jae (Dept.of Mechanical Engineering, Sungkyunkwan University) ;
  • Park, Yeong-Jae (Dept.of Mechanical Engineering, Sungkyunkwan University) ;
  • Kim, Yeong-Jin (Dept.of Mechanical Engineering, Sungkyunkwan University)
  • 김진수 (성균관대학교 기계공학부) ;
  • 김윤재 (성균관대학교 기계공학부) ;
  • 박영재 (성균관대학교 기계공학부) ;
  • 김영진 (성균관대학교 기계공학부)
  • Published : 2002.08.01
Download PDF
⟨ Previous Next ⟩

Abstract

This paper provides an engineering J estimation equation for cylinders with finite internal axial surfacecracks under internal pressure. The proposed equation is the J estimation equation based on deformation plasticity using Ramberg-Osgood (R-O) materials. Based on detailed 3-D FE results using deformation plasticity, plastic influence functions for fully plastic J components are tabulated for practically interesting ranges of the mean radius-to-thickness ratio, the crack depth-to-length ratio, the crack depth-to-thickness ratio. the strain hardening index for the R-O material, and the location along the semi-elliptical crack front. Based on tabilated plastic influence functions, the J estimation equation along the crack front is proposed and validated for R-O materials. Good agreements between the FE results and the proposed J estimation provide confidence in the use of the proposed method to elastic-plastic fracture mechanics of pressurized piping.

Keywords

References

  1. Kumar, V. and German, M.D., 1988, Elastic-Plastic Fracture Analysis of Through-Wall and Surface Flaws in Cylinders, EPRI Report, NP-5596
  2. Zahoor, A., 1991, Ductile Fracture Handbook, Vol. 2 Chapter 6 Axial Through-Wall Crack, Novetech Corp
  3. Bergman, M., 1995, 'Stress Intensity Factors for Circumferential Surface Cracks in Pipes,' Fatigue and Fracture of Engineering Materials and Structures, Vol.18, pp. 1155-1172 https://doi.org/10.1111/j.1460-2695.1995.tb00845.x
  4. Kim, J.S., Kim, Y.J., and Kim, Y.J., 2002, 'Fracture Behavior Estimation for Circumferential Surface Cracked Pipe (I): J-Integral Estimation Solution,' Transactions of the KSME, A, Vol. 26, No. 1, pp. 139-146
  5. Kim, J.S., Kim, Y.J., and Kim, Y.J., 2002, 'Fracture Behavior Estimation for Circumferential Surface Cracked Pipe (II): Finite Element Validation,' Transaction of the KSME, A, Vol. 26, No. 1, pp. 147-152
  6. Raju, I.S. and Newman, J.C., 1983, 'Stress-Intensity Factors for Internal and External Surface Cracks in Cylindrical Vessels,' Journal of Pressure Vessel Technology, Vol. 104, pp. 293-298 https://doi.org/10.1115/1.3264220
  7. Appendix C, API Recommended Practice 579, 2000, American Petroleum Institute
  8. ABAQUS Version 5.8 User's Manual, 1999, Hibbitt, Karlsson & Sorensen, Inc, RI
  9. Kim, Y.J., Shim, D.J., Huh, N.S. and Kim, Y.J., 2001, 'Plastic Limit Pressure for Cracked Cylinders Using Finite Element Limit Analyses,' Submitted for Publication to International Journal of Pressure Vessels and Piping
  10. Rahman, S., Brust, F., Ghadiali, N., Choi, YR., Krishnaswamy, P., Moberg, F., Brickstad, B., Wilkowski, G., 1995, 'Refinement and Evaluation of Crack Opening Area Analyses for Circumferential Trough. Wall Cracks in Pipes, NUREG Report NUREG/CR-6300, Battelle, OH
  11. 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
  12. Ainsworth, R.A., 'The Assessment of Defects in Structures of Strain Hardening Materials,' 1984, Engineering Fracture Mechanics, Vol. 19, pp. 633-642 https://doi.org/10.1016/0013-7944(84)90096-1

Cited by

  1. Finite Element Analysis of Large Deformation of Fiber Metal Laminates Under Bending for Stress-Strain Prediction vol.39, pp.10, 2015, https://doi.org/10.3795/KSME-A.2015.39.10.963