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Open Engineering

formerly Central European Journal of Engineering

Editor-in-Chief: Ritter, William

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An estimation of critical buckling strain for pipe subjected plastic bending

L. Ji
  • School of Materials Sci. & Eng., Xi’an Jiaotong University, Xi’an, 710049, China
  • CNPC Tubular Goods Research Institute, Xi’an, 710065, China
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/ M. Zheng
  • Institute for Energy Transmission Technology and Application, School of Chemical Engineering, Northwest University, Xi’an, 710069, China
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/ H. Chen / Y. Zhao
  • Institute for Energy Transmission Technology and Application, School of Chemical Engineering, Northwest University, Xi’an, 710069, China
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/ L. Yu
  • Institute for Energy Transmission Technology and Application, School of Chemical Engineering, Northwest University, Xi’an, 710069, China
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/ J. Hu
  • Institute for Energy Transmission Technology and Application, School of Chemical Engineering, Northwest University, Xi’an, 710069, China
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/ H. Teng
  • Institute for Energy Transmission Technology and Application, School of Chemical Engineering, Northwest University, Xi’an, 710069, China
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Published Online: 2014-07-27 | DOI: https://doi.org/10.2478/s13531-013-0168-8

Abstract

An approach for estimating critical buckling strain of pipe subjected plastic bending is established in the present paper. A rigid — perfectly plastic material model and cross section ovalization of pipe during bending are employed for the approach. The energy rates of the ovalised pipe bending and the cross section ovalising are proposed firstly. Furthermore, these energy rates are combined to perform the buckling analysis of pipe bending, an estimation formula of critical buckling strain for pipe subjected plastic bending is proposed. The predicting result of the new critical buckling strain formula is compared with the available experimental data, it shows that the formula is valid.

Keywords: pipe; bending; rigid-perfectly plastic material; cross section ovalization; critical buckling strain

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About the article

Published Online: 2014-07-27

Published in Print: 2014-09-01


Citation Information: Open Engineering, Volume 4, Issue 3, Pages 326–333, ISSN (Online) 2391-5439, DOI: https://doi.org/10.2478/s13531-013-0168-8.

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© 2014 Versita Warsaw. This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License. BY-NC-ND 3.0

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