Hi Igor: The "Sales Answer" is "Yes".
I know there is "creep" material modeling behavior available in SolidWorks Simulation Premium, which accounts for material property changes over time (i.e. softening/relaxation or stiffening). This way you could simulate how the deformations change with time under constant load. You will need to tell it how your material behaves using your test data, however. If you anticipate vibration loads and have some S/N (stress-life) test data curves for your materials, you can simulate fatigue effects with SolidWorks Simulation Professional. It reports to you how many cycles your material can withstand at a particular alternating load level...or you can tell it how many cycles to go, and it will tell you the percent "damage" in the material after that many cycles, again, based on your test data. The calculation accuracy is entirely reliant on your test data. Just a suggestion, but hope this might help.