Uniaxial tensile tests were used to determine the mechanical properties of porcine extraocular muscles in vitro.The experimental data were converted into the relationships of stress verse strain.Mooney-Rivilin and Ogden hyperelastic models were used to analyze the corresponding passive behaviors.The hyperelastic parameters identified were used as the input of numerical modeling to establish the finite element models with the corresponding hyperelastic constitutive models,respectively.Compared with the experimental results,the simulation results reveals that Mooney-Rivilin model has more potential for describing the small deformation of extraocular muscles than Ogden model.%用Instron5544万能材料试验机对猪眼外肌样本进行单轴拉伸实验,获得相应的应力-应变关系曲线,然后用Mooney-Rivilin和Ogden超弹性模型对实验数据进行非线性拟合.利用得到的Mooney-Rivilin和Ogden模型的材料特性参数,在ABAQUS软件中建立有限元模型对眼外肌进行模拟,以验证Mooney-Rivilin和Ogden模型的材料特性参数用于数值建模的合理性.将模拟结果与实验结果进行比较,发现Mooney-Rivilin本构模型比Ogden本构模型更适合于描述眼外肌的小变形行为.
展开▼
