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首页> 外文期刊>Proceedings of the Institution of Mechanical Engineers, Part P. Journal of Sports Engineering and Technology >Differences in region-specific brain tissue stress and strain due to impact velocity for simulated American football impacts
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Differences in region-specific brain tissue stress and strain due to impact velocity for simulated American football impacts

机译:模拟美式足球撞击时由于撞击速度造成的特定区域大脑组织应力和应变的差异

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摘要

Concussion has become a prevalent injury in the sport of American football, and its severity can be influenced by the mass of the impactor, velocity, compliance, and direction of impact. As a result, it is important to characterize how American football helmets perform against these impact characteristics. The purpose of this research is to examine how an American football helmet performs across velocities and impact angles which can occur in the sport of American football. The methods used a combination of Hybrid III headform impacts combined with a finite element modeling approach to find the brain deformation variables known to be associated with concussion. At the 9.5 m/s impacts, the brain deformation metrics showed an increase in risk of concussion. Also, the region of the brain with the largest magnitude deformation shifted with differing velocities when analyzed using maximum principal strain but not von Mises stress. The results indicate that impact conditions (location and velocity) can influence the regional brain strains.
机译:脑震荡已成为美式足球运动中的一种普遍伤害,其严重程度会受到冲击器质量,速度,顺应性和冲击方向的影响。因此,表征美式橄榄球头盔在这些冲击特性下的性能非常重要。这项研究的目的是检查美式橄榄球头盔如何在美式足球运动中可能发生的各种速度和冲击角度下表现。这些方法结合了混合III头型撞击与有限元建模方法的组合,以找到已知与脑震荡相关的大脑变形变量。在9.5 m / s的冲击下,大脑变形指标显示脑震荡的风险增加。同样,当使用最大主应变而不是冯·米塞斯应力进行分析时,具有最大幅度变形的大脑区域会以不同的速度移动。结果表明,撞击条件(位置和速度)可以影响局部脑部劳损。

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