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3D FEM-DEM coupling analysis for granular-media-based thin-wall elbow tube push-bending process

  • Hai LiuEmail author
  • Shi-Hong Zhang
  • Hong-Wu Song
  • Gao-Lian Shi
  • Ming Cheng
Original Research
  • 21 Downloads

Abstract

The granular-media-based thin-wall elbow push-bending process involves filling a tube with granular media and pushing the tube into a die to bend a tubular blank into an elbow shape. By means of the mechanical characteristics of granular filler, an elbow tube with t/D < 0.01 (the ratio of wall thickness to outer diameter) and R/D < 1.5 (the ratio of bending radius to outer diameter) can be formed. To investigate the interaction between thin-wall elbow and granular filler, A 3D FEM-DEM coupling numerical model is developed, which takes into account both the deformation behavior of tubular blank (continuum, finite element method FEM) and mechanical characteristics of granular filler (discrete media, discrete element method DEM). By means of the coupling model, the key forming parameters of an elbow tube such as forming force, wall thickness distribution, wrinkling are simulated and compared to experimental results.

Keywords

Elbow tube Granular-media-based Push bending FEM − DEM coupling 

Notes

Acknowledgements

The present work is funded by the National Natural Science Foundation of China (contract no. 51875547), project of Suzhou Key Laboratory Foundation (SZS201815).

Compliance with ethical standards

The authors declare that they have no conflict of interest.

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Copyright information

© Springer-Verlag France SAS, part of Springer Nature 2019

Authors and Affiliations

  1. 1.Department of Precision Manufacturing EngineeringSuzhou Vocational Institute of Industrial TechnologySuzhouPeople’s Republic of China
  2. 2.Institute of Metal ResearchChinese Academy of SciencesShenyangPeople’s Republic of China

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