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

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Abstract

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.

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Authors and Affiliations

  1. Department of Mechanical Engineering, Faculty of Engineering, University of Isfahan, P.O.Box 81746-73441, Isfahan, Iran

    Kourosh Hasanpour & Mehrdad Poursina

  2. Department of Applied Mechanics, Faculty of Mechanical Engineering, K.N. Toosi University of Technology, Tehran, Iran

    Mahmoud Barati

  3. Department of Mechanical Engineering, Islamic Azad University, Khomeinishahr Branch, Iran

    Behnaz Amini

Authors
  1. Kourosh Hasanpour
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  2. Mahmoud Barati
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  3. Behnaz Amini
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  4. Mehrdad Poursina
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Corresponding author

Correspondence to Kourosh Hasanpour.

Additional information

Recommended by Associate Editor Kyeongsik Woo

Kourosh Hasanpour graduated from Sharif University of Technology in 1999. He received his Ph.D from Isfahan University of Technology in 2006. He works as an assistant professor at University of Isfahan and is interested in continuum mechanics and plasticity.

Mahmoud Barati received his BSc. And MSc. Degrees in Mechanical engineering from Shahrekord University (Shahrekord, Iran) and K.N. Toosi Univercity of Technology (Tehran, Iran) in 2007 and 2010, respectively. Mr. Barati is currently a Ph.D student in the department of Mechanical Engineering, Isfahan University of Technology (Isfahan, Iran).

Behnaz Amini received her BSc. And MSc. Degrees in Mechanical engineering from Shahrekord University (Shahrekord, Iran) and Khomeinishahr Islamic Azad University (Isfahan, Iran) in 2007 and 2011, respectively.

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Hasanpour, K., Barati, M., Amini, B. et al. The effect of anisotropy on wrinkling of tube under rotary draw bending. J Mech Sci Technol 27, 783–792 (2013). https://doi.org/10.1007/s12206-013-0124-9

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  • DOI: https://doi.org/10.1007/s12206-013-0124-9

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