血液粘弹特性的力学模型

MECHANIC MODEL OF BLOOD VISCOELASTICITY

本文提出一个由弹性模量为Ｇ的胡克弹簧和粘度为ηＣ（Ｃａｓｓｏｎ粘度）的阻尼器相串联的粘弹体力学模型，并讨论这一模型的粘弹特性：应力松驰、蠕变和动粘弹性。结果表明，这些特性与具有屈服应力的血液的粘弹行为相一致（除蠕变外）。由此现模型可视为血液粘弹特性一个简化的力学模型。本文还探讨了屈服应力与粘弹特性的相互关系。

The paper presented a mechanic model,that is,Hook's spring with modulsof elasticity G in series with damper of viscosity ηc(Casson'siscosity),and dis-cussed viscoelasticity of the model:stress relaxation,creep,dynamic viscoelas-ticity. The results showed viscoelasticity of the model approaches to the real vis-coelasticity of human blood with the yield stress and so the model can be consid-ered as simple mechanic model of blood viscoelasticity。The paper also discussedthe relations of the yield stress to blood viscoelasticity.