The material properties are defined in the Materials.xml file in C:\Program Files\Autodesk\Inventor 2008\Design Data. I use XML Notepad to modify the file, but any xml editor will work. You need to have the following material data in order for Inventor to calculate properties correctly: Density, YoungsModulus, PoissonsRatio, YieldStrength, UltimateTensileStrength, ThermalConductivity, LinearExpansion, & SpecificHeat.
I have been looking for this data to add materials as well. Any chance you can share your excel file?
Edited by: bunnifer451 on Oct 22, 2008 3:51 PM