Modeling of head injuries induced by golf ball impacts
Modeling of head injuries induced by golf ball impacts
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DOI：
10.1080/15376494.2018.1446570
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发表时间：
2019-11
影响因子：
2.8
通讯作者：
Y. Q. Li;X.-L. Gao
中科院分区：
文献类型：
--
作者：
Y. Q. Li;X.-L. Gao
摘要采用计算模型对高尔夫球撞击引起的头部损伤进行了研究。将人体模型与三件式高尔夫球模型相结合，构建新的有限元模型，并利用LS-DYNA进行仿真。用超弹性和粘弹性模型描述了脑组织与高尔夫球的本构关系。为了评估头部损伤风险，计算了该模型的冲击力、von Mises应力、压力和第一主应变，并与现有的实验和仿真数据进行了比较。首先以35 m/s速度下高尔夫球正面撞击人头部为基准案例进行研究。模拟结果表明，该过程不会发生颅骨骨折，但可能发生轻度创伤性脑损伤。然后研究了冲击位置、速度和角度的影响。三个冲击位置（即，正面，侧面和冠）被考虑。冲击速度由15 m/s调整为76 m/s，冲击角度由90°（法向）调整为45°（斜向）。研究发现，外侧（右）撞击导致颅骨骨折和脑损伤的风险高于其他两个撞击位置。同时，随着冲击速度和冲击角度的增大，冲击力、颅骨最大von Mises应力、脑内压力和第一主应变均增大。本研究结果为进一步研究高尔夫球撞击引起的头部损伤提供了有益的指导。
ABSTRACT Head injuries induced by golf ball impacts are studied through computational modeling. A full human body model and a three-piece golf ball model are integrated to construct a new finite element model, and LS-DYNA is employed to perform simulations. The constitutive relations of the brain tissue and golf ball are described using hyperelasticity and viscoelasticity models. To assess head injury risks, the impact force, von Mises stress, pressure, and first principal strain are computed in the current model and compared with existing experimental and simulation data. The frontal impact of a golf ball on a human head at an impact velocity of 35 m/s is taken as the baseline case and studied first. The simulation results reveal that no skull fracture can happen, while mild traumatic brain injuries may take place. The effects of impact location, velocity, and angle are then investigated. Three impact locations (i.e., frontal, lateral, and crown) are considered. The impact velocity is changed from 15 m/s to 76 m/s, and the impact angle is adjusted from 90° (normal) to 45° (oblique). It is found that the lateral (right) impact leads to higher risks of skull fracture and brain injury than the other two impact locations. Also, it is observed that the impact force, the maximum von Mises stress in the skull, and the pressure and first principal strain in the brain increase with the increase of the impact velocity or the impact angle. The findings from the current study provide useful guidelines for further investigations of head injuries induced by golf ball impacts.