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Theoretical Effects of Hydroforming on Crashworthiness of Straight Sections

[+] Author Affiliations
Robert R. Mayer

General Motors Corporation

Paper No. IMECE2004-59707, pp. 591-603; 13 pages
doi:10.1115/IMECE2004-59707
From:
  • ASME 2004 International Mechanical Engineering Congress and Exposition
  • Applied Mechanics
  • Anaheim, California, USA, November 13 – 19, 2004
  • Conference Sponsors: Applied Mechanics Division
  • ISBN: 0-7918-4702-0 | eISBN: 0-7918-4178-2, 0-7918-4179-0, 0-7918-4180-4
  • Copyright © 2004 by ASME

abstract

This paper considers the effect of hydroforming on the downstream crashworthiness for tubes. Three types of aluminum tubes were chosen as examples. Hydroforming will affect both strains and thickness of a tube, which will have opposite effects on the tubes mean crush load for crashworthiness. For hydroforming, the theoretical assumptions of no friction versus sticking friction will result in very different values for thickness, strains, stresses and mean loads when the corner radius is less than half the original tube radius. The theoretical effect on mean crush load can be as much as 25% different than without considering forming effects.

Copyright © 2004 by ASME
Topics: Crashworthiness

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