Browse > Article
http://dx.doi.org/10.3795/KSME-A.2003.27.2.239

New Engineering J and COD Estimation Methods for Axial Through-Wall Cracked Pipes  

Huh, Nam-Su (성균관대학교 기계공학부)
Park, Young-Jae (성균관대학교 기계공학부)
Kim, Yun-Jae (성균관대학교 기계공학부)
Kim, Young-Jin (성균관대학교 기계공학부)
Publication Information
Transactions of the Korean Society of Mechanical Engineers A / v.27, no.2, 2003 , pp. 239-246 More about this Journal
Abstract
This paper proposes engineering estimation equations of elastic-plastic J and COD fur axial through-wall cracked pipes under internal pressure. Based on detailed 3-D FE results based on deformation plasticity, the plastic influence functions for fully plastic J and COD solutions are tabulated as a function of the mean radius-to-thickness ratio, the normalized crack length. and the strain hardening. Based on these results, the GE/EPRI-type J and COD estimation equations are proposed and validated against the 3-D FE results based on deformation plasticity. For more general application to general stress-strain laws or to complex loading, the developed GE/EPRI-type solutions are re-formulated based on the reference stress concept. Such a reformulation provides simpler equations for J and COD, which are then further extended to combined internal pressure and bending. The proposed reference stress based J and COD estimation equations are compared with elastic-plastic 3-D FE results using actual stress-strain data for Type 316 stainless steels. The FE results for both internal pressure cases and combined internal pressure and bending cases compare very well with the proposed J and COD estimations.
Keywords
Axial Through-Wall Crack; Crack Opening Displacement; J-integral; Leak-Before-Break; Reference Stress;
Citations & Related Records
Times Cited By KSCI : 3  (Citation Analysis)
연도 인용수 순위
1 Hopper, A., Wilkowski, G.M., Scott, P., Olson, R., Rudland, D., Kilinski, T., Mohan, R., Ghadidli, N. and Paul, D., 1997, 'The Second International Piping Integrity Research Group Program-Final Report,' NUREG/CR-6452, USNRC
2 'Rules for Inservice Inspection of Nuclear Power Plant Components-ASME Boiler and Pressure Vessel Code, Section XI,' ASME, 1996
3 Kumar, V. and German, M.D., 1988, 'Elastic-Plastic Fracture Analysis of Through-Wall and Surface Flaws in Cylinders,' EPRI Report, NP-5596
4 Kim, Y.J., Huh, N.S. and Kim, Y.J., 2001, 'New Engineering Estimation Method of J-Integral and COD for Circumferential Through-Wall Cracked Pipes,' Transactions of the KSME, A. Vol. 25, No. 3, pp. 548-553   과학기술학회마을
5 Wilkowski, G.M., Ahmad, J., Barnes, C.R., Broek, D., Kramer, G., Landow, M., Marschall, C.W., Maxey, W., Nakagaki, M., Scott, P., Papaspyropoulos, V., Pasupathi, V. and Popelar, C., 1985, 'Degraded Piping Program Phase-II,' NUREG/CR-4082, Vol. 1-Vol. 8, USNRC
6 Scott, P., Wilson, M., Olson, R., Marschall, C., Schmidt, R. and Wilkowski, G.M., 1994, 'International Piping Integrity Research Program - Final Report,' NUREG/CR-6233, Vol. 1-Vol. 4, USNRC
7 Zahoor, A., 1991, 'Ductile Fracture Handbook-Vol. 2 Chapter 6 Axial Through-Wall Crack,' Novetech Corp
8 Rahman, S., Brust, F., Ghadiali, N. and Wilkowski, G.M., 1998, 'Crack-Opening Area Analyses for Circumferential Through-Wall Cracks in Pipes-Part I: Analytical Models,' International Journal of Pressure Vessels and Piping, Vol. 75, pp. 357-373   DOI   ScienceOn
9 France, C.C., 1997, 'Crack Opening Areas and Stress Intensity Factors for Axial and Part-Circumferential Through-Wall Cracks in Cylinders-Summary Report,' AEAT-0643, AEA Technology plc
10 Kim, Y.J., Huh, N.S. and Kim, Y.J., 2002, 'Reference Stress Based Elastic-Plastic Fracture Analysis for Circumferential Through-Wall Cracked Pipes under Combined Tension and Bending,' Engineering Fracture Mechanics, Vol. 69, pp. 367-388   DOI   ScienceOn
11 'R6: Assessment of the Integrity of Structures Containing Defects,' Revision 3, British Energy Generation Ltd., 1999
12 'ABAQUS User's manual,' Hibbitt, Karlson & Sorensen, Inc., 1999
13 Kim, Y.J., Shim, D.J., Huh, N.S. and Kim, Y.J., 2002, 'Plastic Limit Pressures for Cracked Pipes using Finite Element Limit Analyses,' International Journal of Pressure Vessels and Piping, Vol. 79, pp. 321-330   DOI   ScienceOn
14 Ainsworth, R.A., 1984, 'The Assessment of Defects in Structures of Strain Hardening Materials,' Engineering Fracture Mechanics, Vol. 19, pp. 633-642   DOI   ScienceOn