I am currently performing a nonlinear static analysis.
1. What formula is used to calculate Energy Density in Inventor Nastran? Please tell me the formula used in Nastran.
2. Is it possible to display units on the axis labels for Energy and Energy Density in an XY plot? Also, how can I find out the units of these two analysis results?
Hi @SHU_A
1. I cannot find the equation of how Nastran calculates the strain energy. One equation is shown in the Simulation Mechanical documentation. I suspect this is a standard equation. Strain Energy Density = 0.5*[Stress XX*Strain XX + Stress YY*Strain YY + Stress ZZ*Strain ZZ + Stress XY*Strain XY + Stress YZ*Strain YZ + Stress ZX*Strain ZX]. See Simulation Mechanical 2018 Help | Examples Using Custom Results | Autodesk.
2. It is not possible to display the units. The results are in these units which are based on the units set in the Nastran environment when the analysis is ran. (You may want to change the units to SI before running the analysis so that the energy is in Joules = N*m.
John
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