I tried to do the Finite Element Analysis of a simple house as explained by the FreeCAD manual. I am using 0.18 version FreeCAD, but the FEM Analysis described by the FreeCAD manual is done using FreeCAD 16. Because of which I face problems while doing the analysis.
On following the steps of manual, after producing mesh and providing material to the mesh the problem occurs. After the meshing and material step, when we select the fixed constraint command our structure gets disappeared from the screen and we have no structure to provide the constraint.
Then I close the command and try to find the issue in the Tree view, I found there that the meshing group got hidden automatically. Then I press spacebar button to make it visible. But when again I tried to provide the fixed constraint, the structure gets invisible from the screen. This means that on every time when I tried to execute any command after providing meshing and material this issue occurs.
Then I tried to do this exercise, with little changes. After selecting the analysis command instead of producing mesh as explained by the manual, I provide material. Afterwards as described by the FreeCAD manual constraint and pressure are provided. Then I produce the meshing and finally, the calculation is done. If we execute this way the analysis process gives results.
I also tried this exercise with the FreeCAD 16. When following the steps of manual after providing the material when I attempt to provide the constraints, the produced mesh hides but the structure remains there. So we can provide the constraint and afterwards we can make it visible using the spacebar. After that when we tried to provide the pressure, again the meshing hides and after providing the pressure we have to make it visible.
Below given is the link for the FreeCAD manual from which the exercise Creating FEM analysis which is on page 140 is done:
These are the conclusions I have found from whole work which I have done. Please help me to confirm that manual procedure need updation for FreeCAD 0.18 or there is any bug in this version of the software.