Degraded Piping Program - Phase II. Semiannual report, October 1985-March 1986. Volume 4
The efforts in this report are broken into nine work packages related to pipe-fracture research efforts and three work packages that are supporting research efforts. The pipe-fracture efforts involve only circumferential crack orientations. Forty-two pipe experiments have been conducted to date, with all but two at 550/sup 0/F (288/sup 0/C). Approximately 42 additional pipe experiments from other programs were also analyzed. In the analysis effort, a screening criterion was developed to show when the net-section-collapse analysis is valid. This shows that even wrought stainless steel can fail at less than net-section-collapse loads if the pipe diameter is sufficiently large. Numerous predictive J-estimation schemes have been evaluated and modified. A finite length surface cracked pipe estimation scheme has also been developed. Finite element analyses of specimens with welds suggest that the size of the weld relative to the specimen of structure size can affect the deformation J values. Supporting research efforts involve geometry effects on J-R curves, as well as characterizing the material properties for each pipe tested.
- Research Organization:
- Battelle Columbus Div., OH (USA)
- OSTI ID:
- 5048295
- Report Number(s):
- NUREG/CR-4082-Vol.4; BMI-2120-Vol.4; ON: TI87001384
- Country of Publication:
- United States
- Language:
- English
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