Experimental studies of ratcheting of pressurized elbow
- Ishikawajima-Harima Heavy Industries Co., Ltd., Yokohama (Japan)
The piping systems in nuclear power plants are subjected to both static sustained loads such as pressure or dead weight and dynamic loads such as seismic events. Under the severe seismic condition, it is well known that ratcheting occurs in the weak piping element such as elbow. Dynamic experiments and FEM analysis are conducted on a pressurized elbow to clarify the mechanical ratchet phenomena in the seismic event. Dynamic experiments runs on 100A Schedule 80 and 550A Schedule 20 304 type stainless steel elbow. The dynamic loads are experimentally given to the piping model by the shake table. Nonlinear FEM analysis runs on the 550A model using shell elements. Analytical result of the hoop ratcheting at the top of the elbow is in good agreement with the experimental result. Parametric analysis for some pressure and dynamic load levels are performed in order to clarify the condition for preventing the mechanical ratcheting phenomena on pressurized elbow.
- OSTI ID:
- 124711
- Report Number(s):
- CONF-950740-; ISBN 0-7918-1332-0; TRN: IM9548%%301
- Resource Relation:
- Conference: Joint American Society of Mechanical Engineers (ASME)/Japan Society of Mechanical Engineers (JSME) pressure vessels and piping conference, Honolulu, HI (United States), 23-27 Jul 1995; Other Information: PBD: 1995; Related Information: Is Part Of Developments in pressure vessels and piping 1995. PVP-Volume 301; Petrinec, J.N. Jr.; Aggarwal, M.; Becht, C. IV; Bond, C.B.; Dermenjian, A.A.; Fisher, H.D.; Kobayashi, H.; Williams, D.K. [eds.]; PB: 257 p.
- Country of Publication:
- United States
- Language:
- English
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