基于膨隆实验的血管非线性力学特性确定方法
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北京市优秀人才项目(PYZZ090417001147)


Method to determine nonlinear mechanical properties of the blood vessel based on inflate experiment
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    目的 基于实验测试和数值模拟结果,建立反方法确定血管的非线性力学特性。方法 采用自行设计的实验装置,对血管进行压力加载,获取血管膨隆的实验数据;假设血管材料特性符合超弹性Ogden模型,建立血管膨隆的有限元模型,然后结合实测数据及数值模拟结果,利用优化算法建立反方法确定血管的力学特性。结果 得到了描述兔腹主动脉非线性力学特性的Ogden模型一阶和二阶的材料参数,其中一阶Ogden模型参数α=10.86±1.98。经验证兔腹主动脉的力学特性可用超弹性力学模型描述。结论 基于实验测试和数值模拟方法建立的反方法可用来识别血管的非线性力学特性。

    Abstract:

    Objective To propose an inverse method for determining nonlinear mechanical properties of the blood vessel based on the results of experimental data and numerical simulation.Methods Pressure loading was applied on the blood vessel to obtain the experimental data of in vitro holistic blood vessel by using the self-designed device. The finite element model of vessel inflation was established by supposing that material characteristics of the blood vessel were in corresponding with the hyperelastic Ogden model. Mechanical properties of the blood vessel were then computed by the reverse method based on these experimental data and simulated results .Results The first-order and second-order Ogden material parameters of the rabbit abdominal aorta were identified, in which α=10.86±1.98 for the first-order Ogden material model. The mechanical properties of the rabbit abdominal aorta could be characterized as the hyperelastic material. Conclusions The inverse method based on the experimental measurement and numerical simulation can be used to identify the nonlinear mechanical properties of the blood vessel.

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钱秀清,张昆亚,张智河,刘志成.基于膨隆实验的血管非线性力学特性确定方法[J].医用生物力学,2012,27(5):505-509

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  • 收稿日期:2012-08-01
  • 最后修改日期:2012-08-18
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