论文部分内容阅读
目的 确定眼外肌的Ogden超弹性模型参数剪切模量(μ)和曲率(α),通过数值模拟为临床眼外肌手术提供理论依据.方法 通过单轴拉伸实验测试离体狐眼外肌的被动行为,并用一阶Ogden超弹性模型及ABAQUS软件对其进行超弹性分析.结果 实验结果表明,狐眼外肌的被动行为是非线性的.获得了相应的超弹性参数值,其中μ=(16.57±3.76) kPa,α=8.16±1.63.当应变大于6％时,一阶Ogden模型的计算结果与实验结果之间没有显著性差异(P＞0.05).计算结果与数值模拟结果都能很好地拟合实验结果.结论 所确定的超弹性参数可作为狐眼外肌数值建模的输入量.“,”Objective To determine the hyperelastic parameters of shear modulus (μ) and curvature parameter (α) of extraocular muscles (EOMs) in Ogden hyperelastic model,so as to provide theoretical basis for clinical EOM surgery by numerical modeling.Methods The passive behavior of fox EOMs in vitro was determined by the uniaxial tensile test,and the hyperelastic analysis was conducted using the first-order Ogden model and ABAQUS software.Results The experimental result showed that the passive behavior of fox EOMs was nonlinear.The corresponding hyperelastic parameters μ =(6.57 ± 3.76) kPa and oα =8.16 ± 1.63 were obtained.When the strain of EOMs was larger than 6％,there were no statistical differences between the experimental result and the calculation result of the first-order Ogden hyperelastic model (P ＞ 0.05).Both the calculation result and the simulation result well fitted to the experimental result.Conclusions The hyperelastic parameters identified in this study can be used as the input for the corresponding numerical modeling of fox EOMs.