Angular Impact Mitigation system for bicycle helmets to reduce head acceleration and risk of traumatic brain injury.
Angular Impact Mitigation system for bicycle helmets to reduce head acceleration and risk of traumatic brain injury.
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DOI：
10.1016/j.aap.2013.05.019
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发表时间：
2013-10
影响因子：
5.9
通讯作者：
Bottlang, Michael
中科院分区：
文献类型：
--
作者：
Hansen, Kirk;Dau, Nathan;Feist, Florian;Deck, Caroline;Willinger, Remy;Madey, Steven M.;Bottlang, Michael
头部角加速度是创伤性脑损伤 (TBI) 的已知原因，但当代自行车头盔缺乏减轻角加速度的专用机制。一种用于自行车头盔的新型角冲击缓解（AIM）系统已经开发出来，该系统采用弹性悬挂的铝蜂窝衬里来吸收正常冲击中的线性加速度以及倾斜冲击中的角加速度。本研究测试了带有和不带有 AIM 技术的自行车头盔，以比较评估冲击缓解情况。进行正常冲击测试以测量线性头部加速度。进行倾斜冲击测试以测量角头加速度和颈部负载。此外，在计算头部模型中分析了倾斜撞击的加速历史，以预测脑震荡和弥漫性轴突损伤 (DAI) 形式的 TBI 风险。与标准头盔相比，AIM 头盔的峰值线性加速度降低了 14% (p < 0.001)，峰值角加速度降低了 34% (p < 0.001)，颈部负载降低了 22% 至 32% (p < 0.001)。计算结果预测，AIM 头盔可将脑震荡和 DAI 的风险分别降低 27% 和 44%。总之，这些结果表明，与当代发泡聚苯乙烯基自行车头盔相比，AIM 技术可以有效地减轻冲击力，并可以增强对自行车相关 TBI 的预防。需要进一步研究。
Angular acceleration of the head is a known cause of traumatic brain injury (TBI), but contemporary bicycle helmets lack dedicated mechanisms to mitigate angular acceleration. A novel Angular Impact Mitigation (AIM) system for bicycle helmets has been developed that employs an elastically suspended aluminum honeycomb liner to absorb linear acceleration in normal impacts as well as angular acceleration in oblique impacts. This study tested bicycle helmets with and without AIM technology to comparatively assess impact mitigation. Normal impact tests were performed to measure linear head acceleration. Oblique impact tests were performed to measure angular head acceleration and neck loading. Furthermore, acceleration histories of oblique impacts were analyzed in a computational head model to predict the resulting risk of TBI in the form of concussion and diffuse axonal injury (DAI). Compared to standard helmets, AIM helmets resulted in a 14% reduction in peak linear acceleration (p < 0.001), a 34% reduction in peak angular acceleration (p < 0.001), and a 22% to 32% reduction in neck loading (p < 0.001). Computational results predicted that AIM helmets reduced the risk of concussion and DAI by 27% and 44%, respectively. In conclusion, these results demonstrated that AIM technology could effectively improve impact mitigation compared to a contemporary expanded polystyrene-based bicycle helmet, and may enhance prevention of bicycle-related TBI. Further research is required.
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影响因子：
2.3
作者：
Abu-Zidan, Fikri M.;Nagelkerke, Nico;Rao, Sudhakar
通讯作者：
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DOI：
10.1115/1.1590360
发表时间：
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发表时间：
2012-09-01
影响因子：
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作者：
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影响因子：
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作者：
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