I'm trying to run a stress analysis on an assembly of parts that will be printed in Ultem 9085 (on a Fortus 400MC). I am trying to find a plastic that most closely mimics the material properties of Ultem in the Inventor materials library. SOLIDWORKS had PEI which was near perfect, and I see that there's a thermoplastic resin in that library, but I can't seem to find PEI in Inventor. I was wondering if that thermoplastic resin is the best option, or if anyone knows another material in the Inventory library that would be more applicable. Thanks!

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    $\begingroup$ I'm not sure you'll find any. 3D printed parts are non-isotropic due to the layers. I'm pretty sure any simulation will assume the plastic is isotropic. $\endgroup$ – Tom van der Zanden May 17 '17 at 17:41

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