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Li, Y.; Hasegawa, Kunio; Miura, Naoki*; Hoshino, Katsuaki*
Journal of Pressure Vessel Technology, 139(2), p.021203_1 - 021203_7, 2017/04
Times Cited Count：0 Percentile：0(Engineering, Mechanical)In order to investigate the failure behavior of the pipes with local wall thinning subjected to multi-axial loads including the torsion, failure experiments were performed on 20 mm diameter carbon steel pipes with a local wall thinning. Based on the experimental results, the failure estimation method is investigated.
Li, Y.; Hasegawa, Kunio; Miura, Naoki*; Hoshino, Katsuaki*
Journal of Pressure Vessel Technology, 139(1), p.011204_1 - 011204_10, 2017/02
Times Cited Count：2 Percentile：12.73(Engineering, Mechanical)To investigate the failure behavior of cracked pipes subjected to multi-axial loads including the torsion moment, failure experiments were performed on 20 mm diameter stainless steel pipes with a circumferential surface crack or a through-wall crack under combined axial force, bending and torsion moments. Based on the experimental results, the failure estimation methods were investigated.
Li, Y.; Hasegawa, Kunio; Miura, Naoki*; Hoshino, Katsuaki*
Proceedings of 2015 ASME Pressure Vessels and Piping Conference (PVP 2015) (Internet), 10 Pages, 2015/07
The failure estimation method in ASME Code Section XI accounts for the bending moment and axial force due to pressure into account. The torsion moment is not considered. Recently, analytical investigations have been carried out by several authors on the limit load of cracked pipes considering multi-axial loads including torsion and two failure estimation methods for multi-axial loads including torsion moment with different ranges of values have been proposed. In this study, to investigate the failure behavior of cracked pipes subjected to multi-axial loads including the torsion moment and to provide experimental support for the failure estimation methods, failure experiments were performed on 20 mm diameter pipes with a circumferential surface crack or a through-wall crack under combined axial force and bending and torsion moments. Based on the experimental results, the proposed failure estimation methods were confirmed to be applicable to cracked pipes subjected to multi-axial loads.
Li, Y.; Hasegawa, Kunio; Miura, Naoki*; Hoshino, Katsuaki*
Proceedings of 2015 ASME Pressure Vessels and Piping Conference (PVP 2015) (Internet), 8 Pages, 2015/07
Piping lines in nuclear power plants may experience multi-axial loads including tensile force, bending and torsion moments during operation. There is a lack of guidance for failure evaluation under the multi-axial loads including torsion moment. ASME B&PV Code Section XI Working Group is currently developing fully plastic failure evaluation procedures for pressurized piping items containing local wall thinning subjected to multi-axial loads. A failure estimation method for locally wall thinned pipes subjected to multi-axial loads including torsion moment has been proposed through numerical analyses. In this study, in order to investigate the failure behavior of the pipes with local wall thinning subjected to multi-axial loads including the torsion, failure experiments were performed on 20 mm diameter carbon steel pipes with a local wall thinning. Based on the experimental results, the proposed failure estimation method is confirmed to be applicable to pipes with local wall thinning.
