利用微条纹投影法对灰鼠鼓膜的非线性弹性行为进行表征。
Characterization of the nonlinear elastic behavior of chinchilla tympanic membrane using micro-fringe projection.
作者信息
Liang Junfeng, Luo Huiyang, Yokell Zachary, Nakmali Don U, Gan Rong Zhu, Lu Hongbing
机构信息
Department of Mechanical Engineering, The University of Texas at Dallas, Richardson, TX 75080, USA.
School of Aerospace and Mechanical Engineering, The University of Oklahoma, Norman, OK 73019, USA.
出版信息
Hear Res. 2016 Sep;339:1-11. doi: 10.1016/j.heares.2016.05.012. Epub 2016 May 27.
The mechanical properties of an intact, full tympanic membrane (TM) inside the bulla of a fresh chinchilla were measured under quasi-static pressure from -1.0 kPa to 1.0 kPa applied on the TM lateral side. Images of the fringes projected onto the TM were acquired by a digital camera connected to a surgical microscope and analyzed using a phase-shift method to reconstruct the surface topography. The relationship between the applied pressure and the resulting volume displacement was determined and analyzed using a finite element model implementing a hyperelastic 2(nd)-order Ogden model. Through an inverse method, the best-fit model parameters for the TM were determined to allow the simulation results to agree with the experimental data. The nonlinear stress-strain relationship for the TM of a chinchilla was determined up to an equibiaxial tensile strain of 31% experienced by the TM in the experiments. The average Young's modulus of the chinchilla TM from ten bullas was determined as approximately 19 MPa.
在新鲜龙猫鼓泡内完整的全鼓膜（TM）的机械性能，是在施加于TM外侧的-1.0 kPa至1.0 kPa准静态压力下进行测量的。通过连接到手术显微镜的数码相机获取投射到TM上的条纹图像，并使用相移法进行分析以重建表面形貌。使用实施超弹性二阶奥格登模型的有限元模型确定并分析施加压力与由此产生的体积位移之间的关系。通过逆方法确定TM的最佳拟合模型参数，以使模拟结果与实验数据相符。确定了龙猫TM在实验中经历的高达31%等双轴拉伸应变时的非线性应力-应变关系。测定了来自十个鼓泡的龙猫TM的平均杨氏模量约为19 MPa。
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