摘要
改进并验证一个基于人体解剖学结构的头颈部碰撞损伤有限元模型,探讨有限元模型的关键参数,增加颅骨和脑组织之间的脑脊液层(CSF),采用表面流体建模方法模拟其静液压流体腔,改变其余头部各组织的材料属性为粘弹性材料,采用该模型计算颅内压力、最大von Mises应力和颅骨最大主应力。结果表明,修正后的模型具有更高的生物逼真度,在汽车碰撞事故模拟中有更好的压力响应,可用于研究在汽车碰撞事故中头颈部损伤生物力学问题。
Based on the human head-neck anatomic structure, this paper presented a modified head-neck impact injury finite ele- ment model. The eerebrospinal fluid（CSF） was simulated explicitly as a hydrostatic fluid by using a surface-based fluid modeling meth- od. All the head tissues were simulated using viscoelastic materials in the modified model. The intraeranial pressure response and the maximum von Mises stress in the brain were presented, and the maximum principal stress in the skull was calculated. It is found that the modified model yields higher biofidelity and smoother pressure responses during vehicle collision accident, which will contribute to the research on head-neck injury mechanisms.
出处
《森林工程》
2014年第6期89-93,共5页
Forest Engineering
基金
国家自然科学基金资助项目(11272159)
关键词
有限元模型
碰撞损伤
脑脊液
粘弹性材料
参数研究
finite element model
collision head injury
cerebrospinal fluid
viscoelasticity
parameter study
