Hello,

So I'm simulating a contact problem with a rigid cylinder and a foundation base. Both materials have different Young's Modulus and Poisson Ratio. The contact between the two bodies is frictionless.

The uniform distributed load is applied at the bottom of the foundation. The result I'm interested in is the force and the displacement at the top of the foundation.

As you can see, the results from both are quite different. I already know that the equation to compute the force from the displacement is correct. So there must be something wrong with my model.

Also when I try to change from PLANE 183 to PLANE 182, the results hardly change. And I'm having difficulty trying to refine the mesh.

I'm honestly at lost and I don't know how to check if I did anything wrong. I attached the zip file to my model. Any help would be very great. Thank you.