Limit bending moment for pipes with two circumferential flaws under combined internal pressure and bending

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Limit bending moment for pipes with two circumferential flaws under combined internal pressure and bending. / Ye, Hao; Qian, Jinyuan; Yan, Sunting; Jiang, Chenghang; Wei, Lin; Jin, Zhi Jiang.

In: International Journal of Mechanical Sciences, Vol. 106, 01.02.2016, p. 319-330.

Research output: Contribution to journalArticle

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Ye, Hao ; Qian, Jinyuan ; Yan, Sunting ; Jiang, Chenghang ; Wei, Lin ; Jin, Zhi Jiang. / Limit bending moment for pipes with two circumferential flaws under combined internal pressure and bending. In: International Journal of Mechanical Sciences. 2016 ; Vol. 106. pp. 319-330.

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TY - JOUR

T1 - Limit bending moment for pipes with two circumferential flaws under combined internal pressure and bending

AU - Ye, Hao

AU - Qian, Jinyuan

AU - Yan, Sunting

AU - Jiang, Chenghang

AU - Wei, Lin

AU - Jin, Zhi Jiang

PY - 2016/2/1

Y1 - 2016/2/1

N2 - By assuming the neutral axis is perpendicular to the bending plane, this paper presents a general analytical solution to predict the limit bending moment for pipes with two inner surface circumferential flaws under combined internal pressure and bending moment. The circumferential stress caused by internal pressure is taken into account through Mises yield criterion. Based on the general solution, expressions for symmetrical and unsymmetrical bending with two flaws of the same size are proposed. Then the influence of perpendicularity assumption is discussed and it demonstrates that the deviation caused by perpendicularity assumption is negligible. Finite element analyses and experiments are both carried out. The results calculated by proposed expressions are found to be in good agreement with both numerical results and experimental ones. The effect of several parameters on the limit bending moment is also studied. Results reveal that circumferential stress caused by internal pressure has important influence on bending moment, and should be taken into account.

AB - By assuming the neutral axis is perpendicular to the bending plane, this paper presents a general analytical solution to predict the limit bending moment for pipes with two inner surface circumferential flaws under combined internal pressure and bending moment. The circumferential stress caused by internal pressure is taken into account through Mises yield criterion. Based on the general solution, expressions for symmetrical and unsymmetrical bending with two flaws of the same size are proposed. Then the influence of perpendicularity assumption is discussed and it demonstrates that the deviation caused by perpendicularity assumption is negligible. Finite element analyses and experiments are both carried out. The results calculated by proposed expressions are found to be in good agreement with both numerical results and experimental ones. The effect of several parameters on the limit bending moment is also studied. Results reveal that circumferential stress caused by internal pressure has important influence on bending moment, and should be taken into account.

KW - Circumferential flaws

KW - Internal pressure

KW - Limit bending moment

KW - Pipe

UR - http://www.scopus.com/inward/record.url?scp=84954127868&partnerID=8YFLogxK

U2 - 10.1016/j.ijmecsci.2015.12.024

DO - 10.1016/j.ijmecsci.2015.12.024

M3 - Article

VL - 106

SP - 319

EP - 330

JO - International Journal of Mechanical Sciences

JF - International Journal of Mechanical Sciences

SN - 1879-2162

ER -