It has a great significance to analyze the elastic deformation of the vessel wall for cardiovascular diseases' clinical treatment and the selection of the surgical plan.On the premise of making reasonable assumptions

firstly

establish the deformation model of infinitesimal's displacement.Secondly

use the finite element analysis method to divide the area of the vessel wall into a number of triangular surface infinitesimal

export the triangular surface deformation model by the displacement functions of triangle's three vertices and three sides.Finally

this deformation model is verified by simulation

compared with the literature methods

this method shows that it is able to not only calculate the size but also show the direction of the strain and give the results of the strain in three directions.