Static stress-intensity factors and dynamic crack propagation in pipes. Annual report, September 1981

Technical Report · Tue Sep 01 04:00:00 EDT 1981

OSTI ID:6251487

Emery, A F; Kobayashi, A S; Love, W J

Predictive models for critical flaw sizes, initiation and propagation of dynamic cracks in pipes, and the behavior of dynamic crack propagation in compact specimens are described. Parametric results are reported that may be used to predict critical flaw sizes for the initiation of a running crack as well as the crack propagation rate under fatigue in precracked pressurized and thermally shocked cylinders and nozzle-cylinder intersections. Fundamental properties governing rapid crack propagation and crack arrest are described, as are studies on the initiation and propagation of circumferential through cracks in pipes subjected to axial tension. Included are discussions of the use of (1) the three-dimensional finite element code, SAP IV, to analyze the dynamic fracture response of preexisting axially oriented through cracks at the centers of a local bulge in a pressurized pipe and (2) the thermal-hydraulic code LEAKER to predict the nondimensionalized depressurization rates measured in a series of dynamic pipe-rupture experiments.

• Research Organization: Washington Univ., Seattle (USA). Dept. of Mechanical Engineering
• OSTI ID: 6251487
• Report Number(s): EPRI-NP-2024; ON: DE82900365
• Country of Publication: United States
• Language: English

Related Subjects

22 GENERAL STUDIES OF NUCLEAR REACTORS
220200* -- Nuclear Reactor Technology-- Components & Accessories
COMPUTER CODES
CRACK PROPAGATION
CYLINDERS
DEFECTS
DEPRESSURIZATION
FAILURES
FATIGUE
FINITE ELEMENT METHOD
FRACTURES
L CODES
MECHANICAL PROPERTIES
NOZZLES
NUMERICAL SOLUTION
PIPES
PRESSURIZING
S CODES
THERMAL SHOCK