A calculation system has been developed in order to evaluate the thermal fatigue crack propagation of a semi-elliptical crack on the corner of a nozzle. One fatigue crack was assumed on the inner surface of the nozzle corner of a representative PWR reactor vessel. The stress intensity factors K were calculated at the deepest and outermost surface points of the crack using the influence function method. A database was prepared for the cracks with a depth of 0.022 t − 0.5 t (t: pressure vessel thickness) and an aspect ratio of 0.1a/c – 1.0 a/c (a: crack depth and c: half surface width). Eight-noded solid elements and the finite element analysis code MARC were used. The calculation system enables the propagation of fatigue cracks at nozzle corners to be carried out in a very short time.
- Pressure Vessels and Piping Division
Fatigue Crack Propagation Analysis of Nozzle Corner Using the Influence Function Method
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Ochi, M, Hojo, K, & Nagasaki, T. "Fatigue Crack Propagation Analysis of Nozzle Corner Using the Influence Function Method." Proceedings of the ASME 2002 Pressure Vessels and Piping Conference. New and Emerging Computational Methods: Applications to Fracture, Damage, and Reliability. Vancouver, BC, Canada. August 5–9, 2002. pp. 193-199. ASME. https://doi.org/10.1115/PVP2002-1208
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