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Experimental Characterization for Helmet Pads

[+] Author Affiliations
Timothy G. Zhang, Chris Meredith, Paul Moy, Sikhanda S. Satapathy

US Army Research Laboratory, Aberdeen Proving Ground, MD

Allison Muller

Pennsylvania State University, University Park, PA

Paper No. IMECE2017-71511, pp. V003T04A041; 8 pages
  • ASME 2017 International Mechanical Engineering Congress and Exposition
  • Volume 3: Biomedical and Biotechnology Engineering
  • Tampa, Florida, USA, November 3–9, 2017
  • Conference Sponsors: ASME
  • ISBN: 978-0-7918-5836-3


In this study, quasi-static compression and dynamic impact experiments were conducted on helmet pads. Various layers of the foam pad: comfort, stiff and bilayer were tested to characterize their material response. In the compression tests, a piston compressed foam samples at constant velocity. The samples were tested under confined and unconfined conditions. In the dynamic impact experiments, the foam samples were impacted by a rigid projectile. Both the time histories of the force applied to the foam samples and the sample displacement were recorded to calculate the engineering strain and stress in the foam samples. The material stiffness in the impact tests was found to be several times that of the quasi-static tests.



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