Evaluation of head injury criteria using a finite element model validated against experiments on localized brain motion, intracerebral acceleration, and intracranial pressure
Evaluation of head injury criteria using a finite element model validated against experiments on localized brain motion, intracerebral acceleration, and intracranial pressure
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DOI：
10.1533/ijcr.2005.0384
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发表时间：
2006-01-01
影响因子：
1.9
通讯作者：
Kleiven, S
中科院分区：
文献类型：
--
作者：
Kleiven, S
本研究的目的是使用人体头部的有限元 (FE) 模型来分析撞击后不同负载方向和持续时间的影响。开发了详细的人体头部有限元模型，并根据三个撞击方向（正面、枕骨和侧面）的可用尸体实验数据进行了验证。与相同冲击功率相对应的载荷被施加在不同的方向上。此外，还根据中枢神经系统（CNS）组织的应变评估了头部损伤标准（HIC）、最近提出的头部冲击功率（HIP）标准以及峰值角加速度以及角和平移速度的变化。在短时脉冲的颅内压数据和具有高角度分量的长时脉冲的脑内加速度特性方面，实验和模拟之间发现了显着的相关性。然而，发现长持续时间脉冲的颅内压与模拟的相关性较差。这被认为是实验测试期间空气被引入颅内腔的结果。在实验和有限元模拟中，横向冲击导致的大脑和头骨之间的相对运动比正面或枕骨撞击产生的相对运动更小。结果发现，撞击方向的影响对颅内反应有显着影响。在评估旋转脉冲的整体运动损伤测量时，角速度的变化与有限元模型中发现的颅内应变最一致。另一方面，对于平移脉冲，HIC 和 HIP 显示出与模型中发现的应变水平的最佳相关性。
The objective of the present study was to analyze the effect of different load directions and durations following impact using a finite element (FE) model of the human head. A detailed FE model of the human head was developed and validated against available cadaver experiment data for three impact directions (frontal, occipital, and lateral). Loads corresponding to the same impact power were imposed in different directions. Furthermore, the head injury criterion (HIC), the recently proposed head impact power (HIP) criterion, as well as peak angular acceleration, and change in angular and translational velocity were evaluated with respect to the strain in the central nervous system (CNS) tissue. A significant correlation was found between experiments and simulations with regard to intracranial pressure data for a short-duration impulse and intracerebral acceleration characteristics for a long-duration impulse with a high-angular component. However, a poor correlation with the simulations was found for the intracranial pressures for the long-duration impulse. This is thought to be a result of air introduced to the intracranial cavity during experimental testing. Smaller relative motion between the brain and skull results from lateral impact than from a frontal or occipital blow for both the experiments and FE simulations. It was found that the influence of impact direction had a substantial effect on the intracranial response. When evaluating the global kinematic injury measures for the rotational pulses, the change in angular velocity corresponded best with the intracranial strains found in the FE model. For the translational impulse, on the other hand, the HIC and the HIP showed the best correlation with the strain levels found in the model.