2-DIMENSIONAL STRESS-STRAIN RELATIONSHIP FOR CANINE PERICARDIUM
2-DIMENSIONAL STRESS-STRAIN RELATIONSHIP FOR CANINE PERICARDIUM
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DOI：
10.1115/1.2891166
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发表时间：
1990-05-01
影响因子：
1.7
通讯作者：
VITO, RP
中科院分区：
文献类型：
--
作者：
CHOI, HS;VITO, RP
研究了犬心包的二维伪弹性力学性能。假设心包为正交各向异性。材料的对称轴是事先确定的，并与拉伸轴对齐。然后进行各种双轴拉伸试验，并构建了一组转换广泛应变的数据。这一完整的数据集拟合到一个新的指数型本构模型，并确定了一组真正的材料常数为每个标本。利用本构模型和真实材料常数，对恒定侧移试验结果进行了预测，并与试验结果进行了比较。
Two-dimensional pseudoelastic mechanical properties of the canine pericardium were investigated in vitro. The pericardium was assumed to be orthotropic. The material symmetry axis was determined a priori and aligned with the stretching axis. Various biaxial stretching tests were then performed and a set of data convering a wide range of strains was constructed. This complete data set was fitted to a new exponential type constitutive model, and a set of true material constants was determined for each specimen. Using the constitutive model and the true material constants, the results from constant lateral displacement tests were predicted and compared with experiment.