Journal of Mechanical Science and Technology

, Volume 27, Issue 3, pp 783–792 | Cite as

The effect of anisotropy on wrinkling of tube under rotary draw bending

  • Kourosh HasanpourEmail author
  • Mahmoud Barati
  • Behnaz Amini
  • Mehrdad Poursina


Rotary draw tube bending is one of the most complex tube forming processes subject to different process parameters such as material properties and geometry. This process is being practiced in more and more applications in industry due to its high efficiency, high forming precision and quality. However, improper process parameters can lead to wrinkling which restrict the thin walled tube bending. Therefore, the prediction and prevention of wrinkling is very important. Despite its importance, the effect of anisotropy on the occurrence of wrinkling was not considered in the literature up to now. In this investigation, a quantitative study on the wrinkling of thin walled tube bending is carried out through a finite element model of the process using velocity integral parameter, which is used for the detection of wrinkles. The other methods usually warn the wrinkling initiation with no precise location prediction. In addition, the effects of some process parameters, specially normal and planar anisotropy on the tube wrinkling are investigated. It is shown that increasing normal and planar anisotropy (increasing r0 and r90 values) result in a decrease in tube wrinkling.


Normal anisotropy Planar anisotropy Rotary draw bending Velocity integral parameter Wrinkling 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. [1]
    H. Li, H. Yang, M. Zhan and R. J. Gu, Forming characteristics of thin-walled tube bending process with small bending radius, Trans. Nonferrous Met. Soc. China, 16 (2006) 613–623.CrossRefGoogle Scholar
  2. [2]
    H. Li, H. Yang, M. Zhan and R. J. Gu, A new method to accurately obtain wrinkling limit diagram in NC bending process of thin-walled tube with large diameter under different loading paths, J. Mater. Process. Technol, 117 (2006) 192–196.CrossRefGoogle Scholar
  3. [3]
    H. Li, H. Yang, M. Zhan, Zh. Sun and R. Gu, Role of mandrel in NC precision bending process of thin-walled tube, Int. J. Mach. Tool. Manu, 47 (2007) 1164–1175.CrossRefGoogle Scholar
  4. [4]
    H. Li, H. Yang, M. Zhan and R. J. Gu, The interactive effects of wrinkling and other defects in thin-walled tube NC bending process, J. Mater. Process. Technol, 187–188 (2007) 502–507.CrossRefGoogle Scholar
  5. [5]
    H. Li, H. Yang, J. Yan and M. Zhan, Numerical study on deformation behaviors of thin-walled tube NC bending with large diameter and small bending radius, Comput. Mater. Sci, 45 (2009) 921–934.CrossRefGoogle Scholar
  6. [6]
    H. Li, H. Yang, M. Zhan and Y. L. Kou, Deformation behaviors of thin-walled tube in rotary draw bending under push assistant loading conditions, J. Mater. Process. Technol, 210 (2010) 143–158.CrossRefGoogle Scholar
  7. [7]
    A. Kumar, Optimizing the rotary draw tube bending process to avoid wrinkling, Int. J. Model. Simul, 28 (2008) 281–291.Google Scholar
  8. [8]
    L. G. Zhang and T. X. Yu, Modified adaptive dynamic relaxation method and its application to elastic-plastic bending and wrinkling of circular plates, Comput. Struct, 33 (1989) 609–614.zbMATHCrossRefGoogle Scholar
  9. [9]
    H. Yang, J. Yan, M. Zhan, H. Li and Y. Kou, 3D numerical study on wrinkling characteristics in NC bending of aluminum alloy thin-walled tubes with large diameters under multi-die constraints, Comput. Mater. Sci, 45 (2009) 1052–1067.CrossRefGoogle Scholar
  10. [10]
    H. Li, H. Yang and M. Zhan, A study on plastic wrinkling in thin-walled tube bending via an energy-based wrinkling prediction model, Model. Simul. Mater. Sc, 17 (2009) 1–33.Google Scholar
  11. [11]
    H. Orban, G. Lin, S. J. Hu and M. Koc, Wrinkling detection in tube bending simulations, Transactions of NAMRI. SME, 35 (2007) 105–112.Google Scholar
  12. [12]
    M. Strano, Automatic tooling design for rotary draw bending of tubes, Int. J. Adv. Manuf. Technol, 26 (2005) 733–740.CrossRefGoogle Scholar
  13. [13]
    H. Yang and L. Yan, Wrinkling analysis for forming limit of tube bending processes, J. Mater. Process. Technol, 152 (2004) 363–369.CrossRefGoogle Scholar
  14. [14]
    X. Wang and J. Cao, Wrinkling limit in tube bending, J. Eng. Mater. Technol, 123 (2001) 430–435.CrossRefGoogle Scholar
  15. [15]
    R. K. Miller, J. M. Hedgepeth, V. I. Weingarten, P. Das and Sh. Kahyai, Finite element analysis of partly wrinkled membranes, Comput. Struct, 20 (1985) 631–639.CrossRefGoogle Scholar
  16. [16]
    R. J. Gu, H. Yang, M. Zhan, H. Li and H. W. Li, Research on the spring back of thin-walled tube NC bending based on the numerical simulation of the whole process, Comput. Mater. Sci, 42 (2008) 537–549.CrossRefGoogle Scholar
  17. [17]
    H. Takahashi, J. Moro and Sh. Tsuchida, Plastic anisotropy in aluminium drawn tubes, Met. Mater, 4 (1998) 380–385.Google Scholar
  18. [18]
    Y. Kim and Y. Son, Study on wrinkling limit diagram of anisotropic sheet metals, J. Mater. Process. Technol, 97 (2000) 88–94.CrossRefGoogle Scholar
  19. [19]
    I. Salehinia and A. R. Shahani, Effect of sheet anisotropy on the wear in deep-drawing process of a cylindrical cup, Int. J. Mech. Sci, 51 (2009) 856–868.CrossRefGoogle Scholar
  20. [20]
    K. H. Kim, Evolution of anisotropy during twisting of cold drawn tubes, J. Mech. Phys. Solid, 40 (1992) 127–139.CrossRefGoogle Scholar

Copyright information

© The Korean Society of Mechanical Engineers and Springer-Verlag Berlin Heidelberg 2013

Authors and Affiliations

  • Kourosh Hasanpour
    • 1
    Email author
  • Mahmoud Barati
    • 2
  • Behnaz Amini
    • 3
  • Mehrdad Poursina
    • 1
  1. 1.Department of Mechanical Engineering, Faculty of EngineeringUniversity of IsfahanIsfahanIran
  2. 2.Department of Applied Mechanics, Faculty of Mechanical EngineeringK.N. Toosi University of TechnologyTehranIran
  3. 3.Department of Mechanical EngineeringIslamic Azad UniversityKhomeinishahr BranchIran

Personalised recommendations