Evaluation of collapse moment of pressurized 30°–180° bend pipes subjected to out-of-plane bending moment

Author:

Kumar Manish1,Roy Pronab2,Khan Kallol1

Affiliation:

1. Department of Mechanical Engineering, National Institute of Technology Durgapur, Durgapur, India

2. Department of Civil Engineering, National Institute of Technology Durgapur, Durgapur, India

Abstract

The present paper determines collapse moments of pressurized 30°–180° pipe bends incorporated with initial geometric imperfection under out-of-plane bending moment. Extensive finite element analyses are carried out considering material as well as geometric nonlinearity. The twice-elastic-slope method is used to determine collapse moment. The results show that initial imperfection produces significant change in collapse moment for unpressurized pipe bends and pipe bends applied to higher internal pressure. The application of internal pressure produces stiffening effect to pipe bends which increases collapse moment up to a certain limit and with further increase in pressure, collapse moment decreases. The bend angle effect on collapse moment reduces with the increase in internal pressure and bend radius. Based on finite element results, collapse moment equations are formed as a function of the pipe bend geometry parameters, initial geometric imperfection, bend angle, and internal pressure for elastic-perfectly plastic material models.

Publisher

SAGE Publications

Subject

Mechanical Engineering

Cited by 3 articles. 订阅此论文施引文献 订阅此论文施引文献,注册后可以免费订阅5篇论文的施引文献,订阅后可以查看论文全部施引文献

1. Development of new improved plastic collapse moment equations of pressurized different angled pipe bends under bending moments;Proceedings of the Institution of Mechanical Engineers, Part E: Journal of Process Mechanical Engineering;2024-04-24

2. Comparison of plastic collapse moment for different angled non-circular pipe bends under bending moments and internal pressure;Journal of the Brazilian Society of Mechanical Sciences and Engineering;2024-03-23

3. Development of an improved structural integrity assessment correlation for circumferential through-wall cracked 90° shape-distorted pipe bends subjected to in-plane opening bending moment;Proceedings of the Institution of Mechanical Engineers, Part L: Journal of Materials: Design and Applications;2023-08-30

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