We will now assign the material properties to all three parts. We can assign the properties for the board and edge connectors at the same time, since they have the same properties. First, we will change the display units system to use Btu as the unit for energy.
- Expand the Units Systems branch of the browser (tree view), right-click the Display Units <English (in Btu)> heading, and click Activate.
- Select the Material heading for Part 1 in the browser.
- Hold down the Ctrl key and also select the Material headings for Part 3 in the browser.
- Right-click one of the selected headings and choose Edit Material.
- Click the Edit Properties button. Note: The mass density and specific heat values are not needed for a steady-state heat transfer analysis. The values that are currently in these fields are the default alloy steel properties assigned by Inventor Fusion (where the CAD model originated), which are incorrect for the circuit board parts. So, we will enter zero in these two fields. Of course, the actual values can be entered if they are known, but they will have no effect on the results for a steady-state analysis.
- Type 0 in the Mass Density field.
- Type 5e-5 in the Thermal conductivity field.
- Type 0 in the Specific Heat field.
- Click OK
- Click OK to accept the material settings.
- Click the Edit Properties button.
- Double-click the Material heading for Part 2 in the browser.
- Select the Silicon, Si item under the Other
Nonmetals folder in the Element Material Selection dialog. The properties display in the section to the right. - Click OK.
- Click Yes to confirm that you wish to replace the prior material with the library material you just selected.
- Select the Silicon, Si item under the Other