Constant deformation in patran

[robkabob]

I'm trying to set up my patran model with a static load so that when the top layer is compressed with a pressure it will compress evenly. This is supposed to simulate something sitting on top of a test specimen with variable geometry. I currently have it set up so that there is an even pressure, but this causes the weaker parts to deform more, when in reality everything would deform at the same rate.

Any Ideas?