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Shock Waves

, Volume 28, Issue 1, pp 51–62 | Cite as

Dynamic loads on human and animal surrogates at different test locations in compressed-gas-driven shock tubes

  • E. Alay
  • M. Skotak
  • A. Misistia
  • N. ChandraEmail author
Original Article

Abstract

Dynamic loads on specimens in live-fire conditions as well as at different locations within and outside compressed-gas-driven shock tubes are determined by both static and total blast overpressure–time pressure pulses. The biomechanical loading on the specimen is determined by surface pressures that combine the effects of static, dynamic, and reflected pressures and specimen geometry. Surface pressure is both space and time dependent; it varies as a function of size, shape, and external contour of the specimens. In this work, we used two sets of specimens: (1) anthropometric dummy head and (2) a surrogate rodent headform instrumented with pressure sensors and subjected them to blast waves in the interior and at the exit of the shock tube. We demonstrate in this work that while inside the shock tube the biomechanical loading as determined by various pressure measures closely aligns with live-fire data and shock wave theory, significant deviations are found when tests are performed outside.

Keywords

Shock wave Peak overpressure Impulse Shock tube Static pressure Total pressure End effect Surrogate head Overpressure 

Notes

Acknowledgements

This work was supported by Grant No. 14059001 (total pressure measurements and quantification in 9 in. shock tube) entitled “Primary Blast Injury Criteria for Animal/Human TBI Models using Field Validated Shock Tubes” received from the US Army Medical Research and Materiel Command. The headform testing was performed using funds received from Award No. W91CRB-16-C-0025 (PEO Soldier) and is gratefully acknowledged.

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Copyright information

© Springer-Verlag GmbH Germany 2017

Authors and Affiliations

  1. 1.Department of Biomedical EngineeringNew Jersey Institute of TechnologyNewarkUSA

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