A study of the response of the human cadaver head to impact.
A study of the response of the human cadaver head to impact.
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DOI：
10.4271/2007-22-0002
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发表时间：
2007-10
影响因子：
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通讯作者：
W. Hardy;M. Mason;C. Foster;C. Shah;James M. Kopacz;King H. Yang;A. King;Jennifer L. Bishop
中科院分区：
文献类型：
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作者：
W. Hardy;M. Mason;C. Foster;C. Shah;James M. Kopacz;King H. Yang;A. King;Jennifer L. Bishop
高速双平面X射线和中性密度靶被用来检查脑位移和变形的影响。相对运动，最大主应变，最大剪切应变，和颅内压进行了测量，在35的影响，使用8具尸体的头部和颈部标本。评价了头盔的效果。在撞击过程中，局部脑组织倾向于保持其相对于惯性系的位置和形状，导致脑和颅骨之间的相对运动和脑的变形。大脑的局部运动倾向于遵循循环模式。在不同的平面上观察到类似的撞击模式，具有一定程度的前后对称和左右对称。随着线加速度的增加，冲击压力峰值和压力率增加，但冲击压力脉冲持续时间减小。对于这些试验的CFC 60 Hz数据，峰值平均最大主应变和最大剪切约为0.09。峰值平均最大主应变和最大剪切随线加速度、冲击压力和冲击压力率的增大而减小。头部的线性和角加速度随着头盔的使用而减小，但应变增加。这些结果可用于人体头部有限元模型的验证。
High-speed biplane x-ray and neutral density targets were used to examine brain displacement and deformation during impact. Relative motion, maximum principal strain, maximum shear strain, and intracranial pressure were measured in thirty-five impacts using eight human cadaver head and neck specimens. The effect of a helmet was evaluated. During impact, local brain tissue tends to keep its position and shape with respect to the inertial frame, resulting in relative motion between the brain and skull and deformation of the brain. The local brain motions tend to follow looping patterns. Similar patterns are observed for impact in different planes, with some degree of posterior-anterior and right-left symmetry. Peak coup pressure and pressure rate increase with increasing linear acceleration, but coup pressure pulse duration decreases. Peak average maximum principal strain and maximum shear are on the order of 0.09 for CFC 60 Hz data for these tests. Peak average maximum principal strain and maximum shear decrease with increasing linear acceleration, coup pressure, and coup pressure rate. Linear and angular acceleration of the head are reduced with use of a helmet, but strain increases. These results can be used for the validation of finite element models of the human head.