Recently, structural design against a new type of thermal ratcheting under a null-primary-stress condition has been required. The representative case is the thermal ratcheting of a hollow cylinder caused by a traveling temperature distribution. In this paper, the mechanism of this ratcheting is proposed, and the evaluation method of ratcheting strain is shown based on this mechanism. The proposed evaluation method is basically based on the hoop-membrane stress due to the axial temperature distribution, and considers the influence of axial bending stress and traveling distance of temperature distribution. Predicted results by this method correspond to numerical results by FEM and can conservatively estimate the experimental results with several kinds of traveling distance, stress levels, and two types of temperature hold for types 316 and 316FR stainless steels. [S0094-9930(00)01102-1]
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Mechanism-Based Evaluation of Thermal Ratcheting due to Traveling Temperature Distribution
Toshihide Igari, Deputy Chief Researcher,,
Toshihide Igari, Deputy Chief Researcher,
Nagasaki R&D Center, Mitsubishi Heavy Ind. Ltd., Fukahori-machi 5-717-1, Nagasaki 851-0392, Japan
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Hiroshi Wada, Manager,,
Hiroshi Wada, Manager,
Kobe Shipyard and Engine Works, Mitsubishi Heavy Ind. Ltd., Kobe 652, Japan
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Masahiro Ueta, Manager,
Masahiro Ueta, Manager,
Fast Breeder Reactor Development Department, The Japan Atomic Power Company, Tokyo 100, Japan
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Toshihide Igari, Deputy Chief Researcher,
Nagasaki R&D Center, Mitsubishi Heavy Ind. Ltd., Fukahori-machi 5-717-1, Nagasaki 851-0392, Japan
Hiroshi Wada, Manager,
Kobe Shipyard and Engine Works, Mitsubishi Heavy Ind. Ltd., Kobe 652, Japan
Masahiro Ueta, Manager,
Fast Breeder Reactor Development Department, The Japan Atomic Power Company, Tokyo 100, Japan
Contributed by the Pressure Vessels and Piping Division and presented at the Pressure Vessels and Piping Conference, Honolulu, Hawaii, July 23–27, 1995, of THE AMERICAN SOCIETY OF MECHANICAL ENGINEERS. Manuscript received by the PVP Division, October 13, 1998; revised manuscript received January 27, 2000. Associate Technical Editor: R. C. Gwaltney.
J. Pressure Vessel Technol. May 2000, 122(2): 130-138 (9 pages)
Published Online: January 27, 2000
Article history
Received:
October 13, 1998
Revised:
January 27, 2000
Citation
Igari , T., Wada , H., and Ueta , M. (January 27, 2000). "Mechanism-Based Evaluation of Thermal Ratcheting due to Traveling Temperature Distribution ." ASME. J. Pressure Vessel Technol. May 2000; 122(2): 130–138. https://doi.org/10.1115/1.556162
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