Ductile fracture of circumferentially cracked pipes subjected to bending loads
Conference
·
· Am. Soc. Test. Mater., Spec. Tech. Publ.; (United States)
OSTI ID:6410149
A plastic fracture mechanics methodology is presented for part-through cracks in pipes under bending. A previous analysis result on the behavior of part-through cracks in pipes is reviewed. Example quantitative results for the initiation and instability of radial growth of part-through cracks are presented and compared with the experimental data to demonstrate the applicability of the method. The analyses in our previous work are further developed to include the instability of circumferential growth of part-through cracks. Numerical results are then presented for a compliant piping system, under displacement controlled bending, which focus on (1) instability of radial growth (unstable wall breakthrough) and (2) instability of circumferential growth of the resulting throughthe-thickness crack. The combined results of the above two types of analyses are presented on a safety assessment diagram. This diagram defines a curve of critical combination of length and depth of part-through cracks which delineates leak from fracture. The effect of piping compliance on the leak-before-break assessment is discussed.
- Research Organization:
- EDS Nuclear Inc., Bethesda, MD
- OSTI ID:
- 6410149
- Report Number(s):
- CONF-8110313-
- Conference Information:
- Journal Name: Am. Soc. Test. Mater., Spec. Tech. Publ.; (United States) Journal Volume: STP-803
- Country of Publication:
- United States
- Language:
- English
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Related Subjects
22 GENERAL STUDIES OF NUCLEAR REACTORS
220200* -- Nuclear Reactor Technology-- Components & Accessories
36 MATERIALS SCIENCE
360103 -- Metals & Alloys-- Mechanical Properties
BENDING
CRACK PROPAGATION
DIAGRAMS
DUCTILITY
FRACTURE MECHANICS
FRACTURE PROPERTIES
INSTABILITY
LEAK TESTING
MATERIALS TESTING
MEASURING METHODS
MECHANICAL PROPERTIES
MECHANICAL TESTS
MECHANICS
PIPES
TENSILE PROPERTIES
TESTING
220200* -- Nuclear Reactor Technology-- Components & Accessories
36 MATERIALS SCIENCE
360103 -- Metals & Alloys-- Mechanical Properties
BENDING
CRACK PROPAGATION
DIAGRAMS
DUCTILITY
FRACTURE MECHANICS
FRACTURE PROPERTIES
INSTABILITY
LEAK TESTING
MATERIALS TESTING
MEASURING METHODS
MECHANICAL PROPERTIES
MECHANICAL TESTS
MECHANICS
PIPES
TENSILE PROPERTIES
TESTING