0

Full Content is available to subscribers

Subscribe/Learn More  >

The Reaction of the Head and Neck to Blast Waves: Comparison to Blunt Impact

[+] Author Affiliations
Timothy P. Harrigan

Foster-Miller, Inc., Waltham, MA

Paper No. IMECE2008-66061, pp. 39-42; 4 pages
doi:10.1115/IMECE2008-66061
From:
  • ASME 2008 International Mechanical Engineering Congress and Exposition
  • Volume 2: Biomedical and Biotechnology Engineering
  • Boston, Massachusetts, USA, October 31–November 6, 2008
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-4863-0 | eISBN: 978-0-7918-3840-2
  • Copyright © 2008 by ASME

abstract

Due to the relatively large number of exposures to IED blasts in Iraq and Afghanistan, the mechanical effects of blast waves impinging on the head have become an area of high interest. The ways in which the physical aspects of blast loading can cause injury are controversial in some respects but a general consensus is forming that much of the knowledge from closed head injury due to blunt trauma can be applied to injury mechanisms in blast loading [2]. In particular, sudden head rotations are known to be significant, as these are connected to high strains in brain tissue, in much the same way that rotations applied to a jar full of gelatin can induce deformations in the gelatin. High strains induced by sudden rotations of the head are known to be significant in developing injuries to the white matter of the brain [3, 4]. This study used a coupled fluid-structure finite element model to assess the effects of blast over pressure on translation and rotation of the head due to blast wave exposure. A finite element model of a 5th percentile Hybrid-III dummy was used which was supplied by Livermore Scientific Technlogy Corp. (LSTC) as part of a license for LS-Dyna. The ALE formulation for fluid-structure coupling was used [1]. The sudden increase in head velocity is significant, but the sudden increases in rotation rates are small compared to those for some impacts. The increases in velocity and rotation rate due to the passage of the blast wave on the head of the dummy occur over a few milliseconds, and rotation becomes significant only after the neck loads become active, 15 to 20 milliseconds after blast wave impingement. These results indicate that efforts to modify the rotational velocity of the head in the reaction to a blast wave should act within 15 to 20 milliseconds of the blast.

Copyright © 2008 by ASME
Topics: Waves

Figures

Tables

Interactive Graphics

Video

Country-Specific Mortality and Growth Failure in Infancy and Yound Children and Association With Material Stature

Use interactive graphics and maps to view and sort country-specific infant and early dhildhood mortality and growth failure data and their association with maternal

NOTE:
Citing articles are presented as examples only. In non-demo SCM6 implementation, integration with CrossRef’s "Cited By" API will populate this tab (http://www.crossref.org/citedby.html).

Some tools below are only available to our subscribers or users with an online account.

Related Content

Customize your page view by dragging and repositioning the boxes below.

Related eBook Content
Topic Collections

Sorry! You do not have access to this content. For assistance or to subscribe, please contact us:

  • TELEPHONE: 1-800-843-2763 (Toll-free in the USA)
  • EMAIL: asmedigitalcollection@asme.org
Sign In