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Journal Articles

Prediction for plastic collapse stresses for pipes with inner and outer circumferential flaws

Hasegawa, Kunio; Li, Y.; Mares, V.*; Lacroix, V.*

Proceedings of 2018 ASME Pressure Vessels and Piping Conference (PVP 2018), 5 Pages, 2018/07

Appendix C-5320 of ASME Code Section XI provides a formula of bending stress at the plastic collapse, where the formula is applicable for both inner and outer surface flaws. Authors considered the separated pipe mean radii at the flawed ligament and at the un-flawed ligament and formulas of plastic collapse stresses for each inner and outer flawed pipe were obtained. It is found that the collapse stress for inner flawed pipe is slightly higher than that calculated by Appendix C-5320 formula, and the collapse stress for outer flawed pipe is slightly lower than that by Appendix C-5320 formula. The collapse stresses derived from the three formulas are almost the same in most instances. For less common case where the flaw angle and depth are very large for thick wall pipes, the differences among the three collapse stresses become large.

Journal Articles

Collapse evaluation of double notched stainless pipes subjected to combined tension and bending

Suzuki, Ryosuke*; Matsubara, Masaaki*; Yanagihara, Seiji*; Morijiri, Mitsugu*; Omori, Atsushi*; Wakai, Takashi

Procedia Materials Science, 12, p.24 - 29, 2016/00

 Times Cited Count:2 Percentile:18.75

In this study, the plastic collapse strength of asymmetry multiple circumferential notched stainless steel pipes subjected to combined axial tension and bending is investigated experimentally and is compared with the theoretical plastic collapse strength. In addition, the potential is discussed for the simplification of structural integrity evaluation of multiple cracked piping. The integrity of the asymmetry multiple circumferential notched stainless steel pipes subjected to combined axial tension and bending can be evaluated conservatively using the theoretical plastic collapse strength for the pipe with multiple notches calculated based on the elastic-perfectly plastic model.

Journal Articles

Experimental and analytical studies of 4-inch pipe whip tests under PWR LOCA coditions

*; Ueda, Shuzo; ; ; ; ;

Int.J.Press.Vessels Piping, 15, p.125 - 150, 1984/00

 Times Cited Count:9 Percentile:9.75(Engineering, Multidisciplinary)

no abstracts in English

JAEA Reports

Pipe Pupture Test Results:4-inch Pipe Whip Tests Under PWR LOCA Conditions(Run No.5506,5507,5508,5604)

; Ueda, Shuzo; ; ; ; ;

JAERI-M 82-125, 200 Pages, 1982/09

JAERI-M-82-125.pdf:4.2MB

no abstracts in English

Oral presentation

Collapse load of beam subjected to both bending moment and shear force

Tsukimori, Kazuyuki; Moriizumi, Makoto; Abe, Masato; Sadahiro, Daisuke*; Ishigaki, Yoshinobu*

no journal, , 

The elastic limit and the collapse load of a rectangular or circular cross-section beam subjected to both bending moment and shear force are derived analytically with partially approximation. According to the result, there is no interaction between bending moment and shear force in the region of elastic, however, there is an interaction between them with some relation, which is complicated but seems to be close to oval shape. The validity of this relation is examined by FEM analysis.

Oral presentation

Evaluation of impact on structural strength of a thin wall elbow by seismic load direction

Abe, Masato; Watakabe, Tomoyoshi; Moriizumi, Makoto*; Tsukimori, Kazuyuki

no journal, , 

The seismic load which occurs to the equipment and piping at the time of an earthquake in nuclear power plants has the various conditions. As for the load direction, it is not certain when earthquake condition. In this paper, a result of analytical evaluation of impact on structural strength of a thin wall elbow is reported, for the purpose of contribute to structural integrity evaluation of the thin wall piping.

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