Numerical study on deformation behaviors of thin-walled tube NC bending with large diameter and small bending radius

H. Li, H. Yang, J. Yan, M. Zhan

Research output: Journal article publicationJournal articleAcademic researchpeer-review

73 Citations (Scopus)


With respect to wrinkling, wall thinning and cross section deformation, combined with analytical description, the deformation behaviors of thin-walled tube NC bending with large diameter D/t (50.0-87.0) and small bending radius Rd/D (1.0-2.0) are explored via a series of reliable 3D-FE models under ABAQUS platform. The results show that: (1) The segmentation feature is observed for the deformation fields such as effective compressive/tensile regions τc/ τt, stress/strain distributions, wrinkling tendency, wall thinning and cross section deformation. With smaller Rd/D, the tangent stress increases and becomes more inhomogenous. The maximum tangent stress σφat the intrados increases by 46% with Rd/D from 2.0 to 1.2. While the distributions of σφare nearly similar with larger D/t. With smaller Rd/D and larger D/t, the velocity variation of tube materials becomes more obvious. (2) The wrinkling tendency and cross section deformation degree Δ D increase with smaller Rd/D and larger D/t; With smaller Rd/D, both the wall thinning and thickening degrees increase. The maximum wall thinning and thickening degrees increase by 24.0% and 52.5%, respectively. However, with larger D/t, the wall thinning degree increases, while the thickening degree decreases significantly. The maximum wall thinning degree increases by 31.3%, while the maximum thickening one decreases by 58.9%. Crown
Original languageEnglish
Pages (from-to)921-934
Number of pages14
JournalComputational Materials Science
Issue number4
Publication statusPublished - 1 Jun 2009


  • Defects
  • Deformation behaviors
  • FE
  • NC bending
  • Thin-walled tube

ASJC Scopus subject areas

  • Computer Science(all)
  • Chemistry(all)
  • Materials Science(all)
  • Mechanics of Materials
  • Physics and Astronomy(all)
  • Computational Mathematics

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