J-integral of circumferential crack in large diameter pipes
- South Carolina Univ., Columbia, SC (United States). Dept. of Mechanical Engineering
- Westinghouse Savannah River Co., Aiken, SC (United States)
Large diameter thin-walled pipes are encountered in low pressure nuclear power piping system. Fracture parameters such as K and J, associated with postulated cracks are needed to assess the safety of the structure, for example, prediction of the onset of tile crack growth and the stability of the crack. The Electric Power Research Institute (EPRI) has completed a comprehensive study of cracks in pipes and handbook-type data is available. However, for some large diameter, thin-walled pipes the needed information is not included in the handbook. This paper reports our study of circumferential cracks in large diameter, thin-walled pipes (R/t=30 to 40) under remote bending or tension loads. Elastic-Plastic analyses using finite element method were performed to determine the elastic and fully plastic J values for various pipe/crack geometries. A non-linear Ramberg-Osgood material model is used, with strain hardening exponents(n) ranging from 3 to 10. A number of circumferential, through thickness cracks were studied with half crack angles ranging from 0.063{pi} to 0.5{pi}. Results are tabulated for use with the EPRI estimation scheme.
- Research Organization:
- Westinghouse Savannah River Co., Aiken, SC (United States)
- Sponsoring Organization:
- USDOE, Washington, DC (United States)
- DOE Contract Number:
- AC09-89SR18035
- OSTI ID:
- 10108283
- Report Number(s):
- WSRC-MS--92-320; CONF-9203208--1; ON: DE93003708
- Country of Publication:
- United States
- Language:
- English
Similar Records
Experimental and analytical assessment of circumferential through-wall cracked pipes under pure bending
Comparisons of finite element J and KJ estimation scheme predictions for a surface cracked pipe under bending or tension
Related Subjects
220200
36 MATERIALS SCIENCE
360103
BENDING
CALCULATION METHODS
COMPONENTS AND ACCESSORIES
COMPUTER CALCULATIONS
CRACK PROPAGATION
CRACKS
FINITE ELEMENT METHOD
FRACTURE MECHANICS
FRACTURES
MATERIALS TESTING
MATHEMATICAL MODELS
MECHANICAL PROPERTIES
NUCLEAR POWER PLANTS
PIPES
SAFETY
STRAINS
STRESSES