Plastic buckling and ratchetting of straight pipes subjected to deformation-controlled monotonic and cyclic bending
- Mitsubishi Heavy Industries Ltd., Nagasaki (Japan). Nagasaki R and D Center
- Mitsubishi Heavy Industries Ltd., Kobe (Japan). Kobe Shipyard and Engine Works
- Japan Atomic Power Co., Tokyo (Japan). Fast Breeder Reactor Development Dept.
In the structural design of nuclear and fossil power plants used at high temperature, new criteria of piping against thermal expansion load are strongly required. This paper proposes a new design criterion for plastic local buckling of straight pipes subjected to deformation-controlled monotonic bending. The critical deformation corresponding to the start point of buckling is determined from seven specimens with several r/t, L/r etc., and the critical rotation is determined in order to eliminate the effect of L/r. Test results of ratchetting of straight pipes subjected to deformation-controlled cyclic bending are also shown, and the limit of ratchetting is correlated to the critical rotation in the plastic local buckling. These results suggest that the 3Sm limit in ASME Code might be unconservative for the case of thin-walled straight pipes.
- OSTI ID:
- 418127
- Report Number(s):
- CONF-960706-; ISBN 0-7918-1778-4; TRN: 97:001997
- Resource Relation:
- Conference: American Society of Mechanical Engineers (ASME) pressure vessels and piping conference, Montreal (Canada), 21-26 Jul 1996; Other Information: PBD: 1996; Related Information: Is Part Of Pressure vessels and piping design, analysis, and severe accidents. PVP-Volume 331; Dermenjian, A.A. [ed.] [Sargent and Lundy, Chicago, IL (United States)]; PB: 219 p.
- Country of Publication:
- United States
- Language:
- English
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