Linear Impact Energy Attenuation Of A Novel American Football Helmet Liner

To veritfy, further define, and substantiate published findings and product claims related to linear impact energy management of a thin-walled collapsible air chamber (absorbers). Absorbers (N=15) from three adult football helmets were impacted at predefined velocities of V1 = 1.3 m/s, V2=2.3 m/s, V...

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Bibliographic Details
Published in:Medicine and science in sports and exercise 2012-05, Vol.44 (5S), p.956-956
Main Authors: Krzeminski, David E, Goetz, James T, Lippa, Nadine M, Janisse, Andrew P, Piland, Scott G, Gould, Trenton E, Rawlins, James W
Format: Article
Language:English
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Summary:To veritfy, further define, and substantiate published findings and product claims related to linear impact energy management of a thin-walled collapsible air chamber (absorbers). Absorbers (N=15) from three adult football helmets were impacted at predefined velocities of V1 = 1.3 m/s, V2=2.3 m/s, V3=3.0 m/s, V4=4.0 m/s, and V5=4.7 m/s using an instrumented drop tower. Mean peak compression forces, mean maximum compression height, and percent compression were: V1 (734.67 N + or -30.98; 21.78 mm + or -33; 42.6%), V2 (955 N + or -13.11; 13.04 mm + or -60; 65.6%), V3 (1637.67 N + or -12.42; 7.70 mm + or -35; 76.8%), V4 (9254.67 N + or -297.61 ; 5.01 mm + or -36; 86.8%), and V5 (15849 N + or -401.43; 4.04 mm + or -05; 89.4%). A bell-shaped curve was observed at V1, while V2 and V3 exhibited trapezoidal behavior. V4 and V5 curves exhibited an initial trapezoidal region followed by a leptokurtic region.
ISSN:0195-9131