Material and Physics Settings
Add the material. It contains structural as well as thermal properties.
1
In the Home toolbar click Add Material to open the Add Material window.
2
In the Add Material window under Built-In, click Structural steel. Click Add to Component .
3
In the Home toolbar click Add Material  again to close the window.
Solid Mechanics (solid)
Now, set the boundary conditions. In this analysis, the fixed constraints at the bolt holes are replaced by springs in order to avoid large local stresses caused by the thermal expansion.
1
Make sure that Solid Mechanics is the currently active interface. To do this, either select the physics interface from the list in the Physics toolbar or click any node under Solid Mechanics in the Model Builder.
2
In the Physics toolbar click Boundaries and choose Roller.
3
In the Settings window for Roller select Boundaries 17 and 27.
4
In the Physics toolbar click Boundaries and choose Spring Foundation.
5
In the Settings window for Spring Foundation select Boundaries 18–21 and 31–34 (the bolt holes).
6
Locate the Spring section. From the Spring Type list, choose Total spring constant.
7
Choose Diagonal from the list below the text field. The text field changes to a matrix input.
8
Enter 600[kN/mm] in the first two diagonal elements of the ktot matrix as shown in the figure. This provides a stiffness in the global X and Y directions.
Heat Transfer in Solids (ht)
As the Heat Transfer in Solids interface includes a heat balance, the thermal boundary conditions must also be set. A heat flux is prescribed at the two boundaries below the bolt holes. All other boundaries are assumed to be surrounded by air with room temperature, which is modeled by a convection condition.
1
In the Physics toolbar make sure that Heat Transfer in Solids is the currently active physics interface (or click the Heat Transfer in Solids node in the Model Builder).
2
In the Physics toolbar click Boundaries and choose Heat Flux .
3
In the Settings window for Heat Flux, select All boundaries in the Selection list. Then remove boundaries 17 and 27 from the selection.
4
Locate the Heat Flux section. From the Flux type list, choose Convective heat flux. Enter 10 in the text field for the Heat transfer coefficient, h.
 
 
5
In the Physics toolbar click Boundaries and choose Heat Flux .
6
In the Settings window for Heat Flux, select Boundaries 17 and 27.
7
In the Heat Flux section, enter 1e4 in the General inward heat flux, q0, text field.