Stewart S F, Lyman D J
Department of Materials Science and Engineering, University of Utah, Salt Lake City 84112.
J Biomech Eng. 1988 Nov;110(4):344-8. doi: 10.1115/1.3108451.
Compliant vascular grafts were modeled by finite elasticity theory. A linear, biaxial model satisfactorily described the stress-strain behavior in inflation tests, where the sample length was fixed longitudinally and inflated. The model was then used to predict the behavior in a longitudinal test (where the longitudinal stretch was varied while keeping the pressure zero), and in a uniaxial test of a circumferential strip. The model satisfactorily predicted the longitudinal Young's modulus measured in the longitudinal test. The model was less successful in predicting the circumferential Young's modulus measured in the uniaxial test, possibly because the state of stress was not purely uniaxial.
顺应性血管移植物采用有限弹性理论建模。一个线性双轴模型令人满意地描述了在膨胀试验中的应力应变行为，在该试验中样本长度纵向固定并进行膨胀。然后该模型被用于预测纵向试验（纵向拉伸变化而压力保持为零）以及周向条带单轴试验中的行为。该模型令人满意地预测了纵向试验中测得的纵向杨氏模量。该模型在预测单轴试验中测得的周向杨氏模量方面不太成功，可能是因为应力状态并非纯粹单轴的。
