There must be an easier way to do this!  I have an assembly circular pattern that produces 8 more instances of an original part in an assembly for a simulation.  I want each instance to have a a randomly varied elastic modulus.

The best I could come up with was to copy and paste 8 more versions of my original custom material into my custom materials list, individually enter into them the varied elastic moduli computed in an Excel spreadsheet, and then assign to each instance in the simulation parts list a different one of these duplicated materials.

I'm hoping there's a less tedious way to do this in the future! -- John Willett