{"id":3026,"date":"2014-12-22T17:07:02","date_gmt":"2014-12-22T22:07:02","guid":{"rendered":"https:\/\/engineering.jhu.edu\/magazine-archive\/?p=3026"},"modified":"2015-01-02T16:08:36","modified_gmt":"2015-01-02T21:08:36","slug":"new-twist-safer-helmets","status":"publish","type":"post","link":"https:\/\/engineering.jhu.edu\/magazine-archive\/2014\/12\/new-twist-safer-helmets\/","title":{"rendered":"A New Twist on Safer Helmets"},"content":{"rendered":"

\"Safer<\/a>“Better our head than yours\u201d is the motto of an innovative testing apparatus for sports helmets\u2014nicknamed \u201cthe guillotine\u201d\u2014that has been constructed by a team of mechanical engineering students at the Whiting School. The project was sponsored by HIP-TEC of Truckee, California, which designs and manufactures interior cushioning for protective headgear.<\/p>\n

\u201cA lot of the current drop-test towers just drop the head linearly,\u201d notes James Teasley \u201914, now a graduate student who worked on the project along with classmates Ryan Downing \u201914, graduate student Michael Lysak, and Jonathan Wang \u201914. \u201cYou raise a weighted head to a certain distance and drop it and you measure the linear impact.
\nBut current research is showing that angular accelerations due to impact\u2014even at low
\nspeeds\u2014are possibly more dangerous than linear acceleration.<\/p>\n

\u201cOur design set out to provide a way to measure these twisting impacts. We designed a neck joint that allowed rotation of the head and nodding of the head.\u201d Moreover, he says, \u201cthe addition of a body mass to these tests provided a significantly different and more realistic measurement.\u201d<\/p>\n

\u201cIt has been sort of like the Wild West in helmet design, where people don\u2019t really know what rotations and what impacts at what speeds are really detrimental,\u201d says Nick Turner of HIP-TEC, whose brother was killed in a whitewater kayaking accident a decade ago, inspiring the company\u2019s mission.<\/p>\n

\u201cThe international standard has always been based on a single linear death blow. The Hopkins machine is really the first of its kind in the world that can simulate a rotational impact and measure what happens when a body is falling and twisting at the same time, which is what usually happens in the real world, even if it\u2019s just a child falling off a 10-inch bike.\u201d<\/p>\n","protected":false},"excerpt":{"rendered":"

“Better our head than yours\u201d is the motto of an innovative testing apparatus for sports helmets\u2014nicknamed \u201cthe guillotine\u201d\u2014that has been constructed by a team of mechanical engineering students at the Whiting School. The project was sponsored by HIP-TEC of Truckee, California, which designs and manufactures interior cushioning for protective headgear. \u201cA lot of the current…<\/p>\n","protected":false},"author":4,"featured_media":3566,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[25],"tags":[],"class_list":["post-3026","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-students","issue-winter-2015"],"acf":[],"yoast_head":"\nA New Twist on Safer Helmets - JHU Engineering Magazine<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/engineering.jhu.edu\/magazine-archive\/2014\/12\/new-twist-safer-helmets\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"A New Twist on Safer Helmets - JHU Engineering Magazine\" \/>\n<meta property=\"og:description\" content=\"“Better our head than yours\u201d is the motto of an innovative testing apparatus for sports helmets\u2014nicknamed \u201cthe guillotine\u201d\u2014that has been constructed by a team of mechanical engineering students at the Whiting School. 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