Radial deformation of bolt's cross section when using bolt load of unsymmetrical assembly

BoltLoad Abaqus A/CAE A/Std 
Dear community,

I am facing the following problem. I've got 2 bolts which tighten a steel plate to a plastic housing. The cylindrical part of the bolt is tied with the plastic housing's bores, and I am using length adjustments to initiate the contacts in the first steps, but then I apply force to tighten the 2 bolts. I am interested in the most realistic deformation of the plastic housing, which means, that I need to correctly model the bending of the bolt itself (the bolt will bend because of the steel plate's resistance towards deformation ; thus ,,unsymmetrical assembly" in the title).
When I look at the deformed state of the bolt, I can see as if the cross section where the bolt load is defined, was splitting the bolt into two parts, and each such part goes radially away from each other. I don't know what is the radial stiffness of such bolt, but overall, this deformation doesn't seem to me to be the correct behavior, so I want to check with you here if this is correct physical behavior and I can model my bolts like this.
Or is there any other modelling technique which would reflect the radial stiffness of the bolt?
Why I want to be sure is that at some point I will be asked to use bolt load again, but this time the surface under its head will not be flat, but somewhat curvy (because of the manufacturing process) - and I think it would want to deform the bolt (bend) - I need to know whether modelling feature Bolt Load in A/CAE works well in these scenarios and what are other options.

 

Thanks for any kind of support.