When I run a simulation in SOLIDWORKS Simulation, I notice an issue with the displacement results related to material stiffness.

If I assign a soft material with low hardness / low stiffness, the resulting displacement is about 6 mm. However, when I change the material to a much stiffer one, the displacement changes very little and does not seem consistent with real-life behavior.

I observe this problem in all of my tests, not just in a specific model. The loads, fixtures, and mesh remain the same — only the material properties are changed.

I would expect a significantly smaller displacement when using a stiffer material, but that is not what the results show.

Am I missing something related to material properties, boundary conditions, solver settings, or nonlinear effects?

Any guidance would be appreciated.