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首页> 外文期刊>Journal of Biomechanics >Stress-controlled viscoelastic tensile response of bovine cornea.
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Stress-controlled viscoelastic tensile response of bovine cornea.

机译：牛角膜的应力控制粘弹性拉伸响应。

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摘要

The viscoelastic response of bovine corneas was characterized using in vitro load-controlled uniaxial tension experiments. Specifically, two types of tests were employed: cycled ramp tests over a range of loading rates and creep tests over a range of hold stresses. Multiple replicates of each were used to quantify natural variability as well as mean trends. A preconditioning protocol was used to obtain a unique reference state before testing and to overcome the effects of non-physiological loading. A quasi-linear viscoelastic model incorporating a representation of the microstructure of the cornea was compared to the experimental results. For low stresses and moderate durations this model compares favorably, but overall the material displays non-linearities that cannot be represented within the quasi-linear framework.
机译：牛角膜的粘弹性响应使用体外负荷控制的单轴拉伸实验进行了表征。具体来说，采用了两种类型的测试：在一系列加载速率下的循环斜坡测试和在一系列保持应力下的蠕变测试。每个样品的多次重复用于量化自然变异性和平均趋势。预处理协议用于在测试之前获得唯一的参考状态，并克服非生理负荷的影响。准线性粘弹性模型结合了角膜微观结构的表示与实验结果进行了比较。对于低应力和适度的持续时间，此模型可以很好地进行比较，但是总体而言，材料显示非线性，无法在准线性框架内表示。

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