Thank you Ashish for sending the link. The only thing is that my geometry is a hemi sphere. I generated element orientation in order to have the results in r (Z), theta (x) and phi (y) direction. So, I guess I need to consider the element orientation to be able to define the variable young modulus along the radial direction. So any idea of how I can consider the element orientation for x, y and z instead of cartesian or cylindrical coordinate system?