The effect of blast overpressure on the mechanical properties of the human tympanic membrane
The effect of blast overpressure on the mechanical properties of the human tympanic membrane
复制标题
爆炸超压对人体鼓膜力学性能的影响
DOI：
10.1016/j.jmbbm.2019.07.026
复制
发表时间：
2019
影响因子：
3.9
通讯作者：
Lu, Hongbing
中科院分区：
文献类型：
--
作者：
Liang, Junfeng;Smith, Kyle D.;Gan, Rong Z.;Lu, Hongbing
由于鼓膜在爆炸超压作用下的易损性，鼓膜破裂是爆炸伤的主要标志之一。人体TM的力学性能在暴露于如此高强度的冲击波后表现出显著的变化。到目前为止，公布的数据是从测量TM条从TM后，暴露于爆炸超压。为制备条带样本而解剖TM可能会对TM造成二次损伤，从而可能导致无法代表爆炸损伤的数据。在本文中，我们进行力学测试的全TM在人的颞骨。对在略低于TM破裂阈值的压力水平下暴露于爆炸三次后由颞骨制备的每个样品进行整个TM的膨胀实验。使用微条纹投影方法，体积位移作为压力的函数，并在有限元分析中建模，以确定爆炸后的人类TM的力学性能，其结果与对照TM没有暴露于爆炸相比，它们的关系。结果发现，人体TM的杨氏模量降低约20%后，暴露于多个冲击波。研究结果可用于人耳仿真模型，以帮助理解爆炸超压对听力损失的影响。
The rupture of the tympanic membrane (TM) is one of the major indicators for blast injuries due to the vulnerability of TM under exposure to blast overpressure. The mechanical properties of the human TM exhibit a significant change after it is exposed to such a high intensity blast. To date, the published data were obtained from measurement on TM strips cut from a TM following an exposure to blast overpressure. The dissection of a TM for preparation of strip samples can induce secondary damage to the TM and thus potentially lead to data not representative of the blast damage. In this paper, we conduct mechanical testing on the full TM in a human temporal bone. A bulging experiment on the entire TM is carried out on each sample prepared from a temporal bone following the exposure to blast three times at a pressure level slightly below the TM rupture threshold. Using a micro-fringe projection method, the volume displacement is obtained as a function of pressure, and their relationship is modeled in the finite element analysis to determine the mechanical properties of the post-blast human TMs, the results of which are compared with the control TMs without an exposure to the blast. It is found that Young's modulus of human TM decreases by approximately 20% after exposure to multiple blast waves. The results can be used in the human ear simulation models to assist the understanding of the effect of blast overpressure on hearing loss.