Share Email Facebook Twitter LinkedIn User's Guide for Autodesk Inventor NastranLearn to perform enhanced finite element analyses of composite structures with the use of Helius PFA for Autodesk Inventor Nastran. Pages in this section Introduction General Requirements for Nastran Input Files Use a Text Editor to Convert Pre-Existing Input Files for Use with Helius PFA The HIN File Examine Helius PFA Results with Nastran Editor Appendix A - MATPFA Fields Appendix B - Helius PFA Result Outputs Parent page: User Guides