Two layered cylindrical shell model for a dog's thoracic aorta

In this work, utilizing the result of our previously conducted experiment for a dog's thoracic aorta, a two layered cylindrical shell model has been presented. Assuming that the aorta consists of an orthotropic medial and an isotropic adventitial layer, a set of strain energy density functions for each layer is introduced and the values of material coefficients are obtained by comparing the analytical results with the experiments. The numerical results show that the adventitia has a significant influence on the stress distribution through the wall. Although the radial stress is continuous at the interface, the slope of it becomes discontinuous. This is due assumptions we have made about the layered structure of arteries.