Cylindrical anisotropic stiffness

Hi,

Problem:

Imagine a cylindrical shell, with a certain wall thickness. The material properties of the shell have an isotropic density (rho) and an anisotropic stiffness described by a constant radial component (E_r) and a constant tangential component (E_perp). How to define that using the anisotropic solid model for a linear elastic material?



Thanks !
C