The effect of shell geometry on the impact attenuating capabilities of ice hockey helmets relative to liner structural characteristics and impact conditions /

• Main Author: Spyrou, Evangelos.
• Other Authors: Hoshizaki, T. B. (advisor)
• Format: Others
• Language: en
• Published: McGill University 1997
• Subjects: Helmets > Design and construction.; Hockey > Equipment and supplies.
• Online Access: http://digitool.Library.McGill.CA:80/R/?func=dbin-jump-full&object_id=26768

Shell geometry is one of the many variables that can influence the way energy is absorbed by the helmet during impact. The purpose of this study was to gain knowledge in how shell geometry affects the performance of the shell relative to liner structural characteristics and impact conditions. Samples, representing a section of a hockey helmet, consisted of a shell with one of nine geometric formations (width and angle), and a liner (Dertex or EPP). Each sample was impacted three times at three different levels of energy using a monorail drop test. Significant differences were observed for all main effects and two-way interactions for both liner types. Overall the 90 degree angle and 16mm width performed the best. It was found that geometry influences the elastic properties of the shell in a very specific way. It was also found that geometry can improve energy absorption by 4-35% depending on the combination of other variables involved.