A Mechanical Model for Passive Behaviour of Rats Carotid Artery. Ein mechanisches Modell für das passive Verhalten der Arteria Carotis von Ratten

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Abstract
Assuming that the arterial wall material is elastic, homogeneous and incompressible, an orthotropic elastic model is presented for rats carotid artery. Introducing a strain energy density function which consists of both polynominal and exponential parts, the simultaneous inflation and the axial stretch of a cylindrical artery is studied and the values of material coefficients are determined by comparing the theoretical pressure and the axial force with the experimental results on rats carotid artery [17]. Using the least square error method, the maximum deviation between the theory and the experiment is found be 3.7%, which seems to be a fairly good approximation. The variation of incremental pressure moduls with inner pressure indicates that, unlike in dog''s abdominal aorta, the relation between the incremental modulus and intraluminal pressure is curvilinear.

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