Mechanical characterization of athletic helmet shells.
| Autor: | Bower, Dane, Herbert, Erik, Breedlove, Katherine M, Lacy, Alicia Pike M., Casa, Douglas, Bowman, Thomas G. |
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| Předmět: |
FOOTBALL helmets
HOCKEY equipment LACROSSE equipment HOCKEY MECHANICS (Physics) EXPERIMENTAL design ANALYSIS of variance RACKET games CROSS-sectional method ATHLETIC equipment SYNTHETIC gums & resins POLYETHYLENE COMPARATIVE studies SAFETY hats REPEATED measures design MATERIALS testing FOOTBALL SURFACE properties |
| Zdroj: | Sports Biomechanics; Feb2024, Vol. 23 Issue 2, p241-252, 12p |
| Abstrakt: | Our purpose was to compare the mechanical properties of the protective outer shells of various athletic helmets in their final, fully manufactured form. Sections were taken from 3 different helmet shells (Bauer RE-AKT hockey helmet, Cascade R lacrosse helmet, and Riddell Speedflex football helmet) at 4 different locations (front, side, top, and rear) for a total of 12 test specimens. The 4 specimens from each helmet shell were potted together in epoxy resin moulds and mechanically polished. The hardness, elastic modulus and phase angle were measured using dynamic nanoindentation performed at 100 Hz with an oscillation amplitude of 1 nm (rms). Repeated ANOVA analysis was used to compare each of the dependent variables for each of the 3 helmets across the 4 different locations. The interaction between helmet type and location was significant for hardness (F |
| Databáze: | Complementary Index |
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