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Finite Element Analysis of Central Bursting Defects Occurring in Cold Forward Extrusion

[+] Author Affiliations
Man-Soo Joun, Min-Cheol Kim

Gyeongsang National University, Jinju, Gyeongsangnam, Republic of Korea

Duk-Jae Yoon, Ho-Joon Choi

Korea Institute of Industrial Technology, Incheon, Republic of Korea

Yo-Hun Son

Youngsin Metal Industrial Co., Pyeongtaek, Kyunggi, Republic of Korea

Paper No. MSEC2011-50148, pp. 169-174; 6 pages
doi:10.1115/MSEC2011-50148
From:
  • ASME 2011 International Manufacturing Science and Engineering Conference
  • ASME 2011 International Manufacturing Science and Engineering Conference, Volume 1
  • Corvallis, Oregon, USA, June 13–17, 2011
  • ISBN: 978-0-7918-4430-4
  • Copyright © 2011 by ASME

abstract

An improved approach to simulating the formation of central bursting defects is presented in this paper. The rigid-plastic finite element method and a modified McClintock damage model are employed. An improved node-splitting technique with degenerate element cleaning is proposed. The technique is applied to several cold forward extrusion processes to reveal the effects of reduction of area, die conical angle, and friction on the formation of central bursting defects. A comparison with experimental results and predictions found in the literature shows that the present analysis provides more realistic predictions of the shape of a central bursting defect (i.e., an obtuse V-shape, which is typical).

Copyright © 2011 by ASME

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