From FreeCAD Documentation
- In the tree view expand CCX_Results and select the ResultMesh object and press the Space key.
- Result: The visibility of the FEM mesh will be turned off. The geometrical model is still visible.
- In the tree view double click on the FEMConstraintForce object to open its task panel
- In the task window change the load value to 500000000 N = 500 MN (Note: force unit in task window has to be in N)
- On the geometrical model click on one of the long edges in x-direction.
- Click on the Direction button.
- Result: The red arrows that illustrate force will change their direction in x-direction. They indicate the force direction.
- Since tension should be applied to the box the Reverse Direction needs to be triggered by clicking on it.
- The red arrows of the force will change their direction.
- Click on OK in task window.