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GEOSTUDIO 2012 CRACKLE CRACK
In this region, a crack can be safely inspected by a coolant leak detector. The region between the leak assessment and failure assessment curves satisfies the condition of detectable leakage without breakage. A leakage assessment curve, a locus of assessment point for detectable coolant leakage, was defined in the failure assessment diagram. This paper examines the conditions of the detectable coolant leakage without breakage.
GEOSTUDIO 2012 CRACKLE CRACKED
The leak and break behavior of a cracked coolant pipe subjected to an internal pressure and a bending moment was analyzed with a failure assessment diagram using the R6 approach. Kanno, Satoshi Hasegawa, Kunio Shimizu, Tasuku Saitoh, Takashi Gotoh, Nobuho â–º The proposed FAD is independent of yield strength and is a lower-bound for typical hardeningĪnalysis of leak and break behavior in a failure assessment diagram for carbon steel pipes â–º We examine the geometric and material dependence of the FADs for X- and K-joints. Highlights: â–º This study proposes geometric dependent expressions of FADs for tubular joints. This study proposes a parametric expression for the failure assessment curves based on the geometric parameters for surface cracks in circular hollow section X- and K-joints. The crack depth ratio exerts a stronger effect on the computed failure assessment curve than does the crack aspect ratio. The failure assessment curves indicate negligible variations with respect to the crack-front locations and the material yield strength. The area reduction factor, used in defining the strength of the cracked joints, imposes a significant effect on the computed failure assessment curve. This study examines both the material and geometric dependence of the failure assessment curves. The failure assessment curves derive from the square root of the ratio between the linear–elastic and the elastic–plastic energy release rates, computed from the domain-integral approach. This paper reports the failure assessment curves for semi-elliptical surface cracks located at hot-spot positions in the circular hollow section X- and K-joints.
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(orig./HP)įailure assessment diagrams for circular hollow section X- and K-joints It is necessary to construct the EPFM failure assessment curve of the surface crack for the failure assessment of surface cracked structure. The elastic-plastic failure assessment curve of surface crack is relevant to crack geometry, loading form and material deformation behaviour. The simplified NLSM is able to calculate the EPFM parameters and failure assessment curve for the surface cracked structure correctly and conveniently. International Nuclear Information System (INIS) The elastic-plastic failure assessment diagram of surface cracked structure