Viscoelastic properties of human tympanic membrane
Viscoelastic properties of human tympanic membrane
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DOI：
10.1007/s10439-006-9227-0
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发表时间：
2007-02-01
影响因子：
3.8
通讯作者：
Gan, Rong Z.
中科院分区：
文献类型：
--
作者：
Cheng, Tao;Dai, Chenkai;Gan, Rong Z.
人耳的鼓膜或鼓膜将声波从外耳道传递为机械振动进入中耳和耳蜗。鼓膜 (TM) 的机械特性在声音通过耳朵的传输中发挥着重要作用。尽管文献中有关TM线弹性特性的资源有限，但缺乏低应力水平下TM粘弹性特性的测量或建模。本研究对新鲜人体TM标本进行了单轴拉伸、应力松弛和失效试验，以探讨TM的力学性能。利用超弹性Ogden模型和数字图像相关方法对实验结果进行了分析。 TM 的本构方程和非线性弹性特性由应力范围为 0 至 1 MPa 的应力和应变函数表示。 TM 的粘弹性特性通过应力松弛函数和滞后来描述。结果表明，借助数字图像相关分析的单轴拉伸试验是测量耳组织机械性能的可靠且有用的方法。本文提供的数据有助于耳组织的实验测量和理论分析中的耳生物力学。
The tympanic membrane or eardrum of human ear transfers sound waves into mechanical vibration from the external ear canal into the middle ear and cochlea. Mechanical properties of the tympanic membrane (TM) play an important role in sound transmission through the ear. Although limited resources about linear elastic properties of the TM are available in literature, there is a lack of measurement or modeling of viscoelastic properties of the TM at low stress levels. In this study, the uniaxial tensile, stress relaxation, and failure tests were conducted on fresh human cadaver TM specimens to explore mechanical properties of the TM. The experimental results were analyzed using the hyperelastic Ogden model and digital image correlation method. The constitutive equation and nonlinear elastic properties of the TM were presented by functions of the stress and strain at the stress range from 0 to 1 MPa. Viscoelastic properties of the TM were described by the stress relaxation function and hysteresis. The results show that the uniaxial tensile test with the aid of digital image correlation analysis is a reliable and useful approach for measuring mechanical properties of ear tissues. The data presented in this paper contribute to ear biomechanics in both experimental measurement and theoretical analysis of ear tissues.