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Application of Tubes Filled With Granules for Crashworthy Design of Automobiles

[+] Author Affiliations
Dong Wook Lee, Zheng-Dong Ma, Noboru Kikuchi

University of Michigan at Ann Arbor, Ann Arbor, MI

Paper No. IMECE2007-44100, pp. 517-523; 7 pages
  • ASME 2007 International Mechanical Engineering Congress and Exposition
  • Volume 10: Mechanics of Solids and Structures, Parts A and B
  • Seattle, Washington, USA, November 11–15, 2007
  • Conference Sponsors: ASME
  • ISBN: 0-7918-4304-1 | eISBN: 0-7918-3812-9
  • Copyright © 2007 by ASME


An innovative means for improving crashworthiness is to use tubes filled with a granular material to absorb energy during the process of a crash. In this paper, we will study how to use granular materials in the tubes found in the front posts of automobiles for improved safety. The focus will be on a specific design of tubes filled with a granular material. Note that granular particles can create enormous friction through their interactions; therefore a tube filled with a granular material can absorb much more crash energy than an empty tube. The application of granular materials to a crashworthiness design is very challenging but highly effective. In this paper, we will develop an analytic model based on the effective thickness theory of a tube filled with granules.

Copyright © 2007 by ASME



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