3 Node Beam Elements not yet supported

[wmayer]

git commit 5466568 fixes all the reported problems.

[makkemal]

Some enhancement of beam sections allowing user to select circular and pipe beam sections
https://github.com/makkemal/FreeCAD/tree/Beam_sections

[bernd]

git commit 5466568 fixes all the reported problems.

brilliant

[bernd]

Some enhancement of beam sections allowing user to select circular and pipe beam sections
https://github.com/makkemal/FreeCAD/tree/Beam_sections

included in my dev branch https://github.com/berndhahnebach/FreeC ... meshregion. I have a few minor things but I'm gone fix them right above yours, if you guys don't mind.

[bernd]

git commit 5466568 fixes all the reported problems.

brilliant

Ahh one thing still remains. We've found a bug in unv reader ...

Code: Select all

# 10 node tetrahedron --> tetra10 ###############
import Fem
tetra10 = Fem.FemMesh()  # a FEM mesh
tetra10.addNode( 6, 12, 18, 1)  # some nodes
tetra10.addNode( 0,  0, 18, 2)
tetra10.addNode(12,  0, 18, 3)
tetra10.addNode( 6,  6,  0, 4)
tetra10.addNode( 3,  6, 18, 5)
tetra10.addNode( 6,  0, 18, 6)
tetra10.addNode( 9,  6, 18, 7)
tetra10.addNode( 6,  9,  9, 8)
tetra10.addNode( 3,  3,  9, 9)
tetra10.addNode( 9,  3,  9,10)
tetra10.addVolume([1, 2, 3, 4, 5, 6, 7, 8, 9, 10], 88)  # a volume with ID: 88
tetra10.Volumes
obj = App.ActiveDocument.addObject("Fem::FemMeshObject","tetra10")
obj.FemMesh = tetra10
obj.FemMesh.Volumes

meshpath = u"/home/hugo/Desktop/femmesh.unv"
tetra10.write(meshpath)
mesh = Fem.read(meshpath)
mesh.Volumes

and even worse, because unv is used in FreeCAD to save FEMmeshes to fcstd files

Code: Select all

################################################################
doc = App.newDocument('mydoc')
import Fem
tetra10 = Fem.FemMesh()  # a FEM mesh
tetra10.addNode( 6, 12, 18, 1)  # some nodes
tetra10.addNode( 0,  0, 18, 2)
tetra10.addNode(12,  0, 18, 3)
tetra10.addNode( 6,  6,  0, 4)
tetra10.addNode( 3,  6, 18, 5)
tetra10.addNode( 6,  0, 18, 6)
tetra10.addNode( 9,  6, 18, 7)
tetra10.addNode( 6,  9,  9, 8)
tetra10.addNode( 3,  3,  9, 9)
tetra10.addNode( 9,  3,  9,10)
tetra10.addVolume([1, 2, 3, 4, 5, 6, 7, 8, 9, 10], 88)  # a volume with ID: 88
tetra10.Volumes
obj = doc.addObject("Fem::FemMeshObject","tetra10")
obj.FemMesh = tetra10
obj.FemMesh.Volumes

doc.saveAs(u"/home/hugo/Desktop/femmesh.fcstd")
App.closeDocument("mydoc")
FreeCAD.open(u"/home/hugo/Desktop/femmesh.fcstd")
App.ActiveDocument.tetra10.FemMesh.Volumes

after reopen the FreeCAD document the FemMesh has changed because the element number of the volume is not 88 but 1 instead.

[wmayer]

Ahh one thing still remains. We've found a bug in unv reader ...

Yes, that's the issue I found. But fixing smesh stuff is not my realm.

[makkemal]

@Bernd

included in my dev branch https://github.com/berndhahnebach/FreeC ... meshregion. I have a few minor things but I'm gone fix them right above yours, if you guys don't mind.

Yes go for it, we are just picking up some low hanging fruit in terms of functionality

[bernd]

Some enhancement of beam sections allowing user to select circular and pipe beam sections
https://github.com/makkemal/FreeCAD/tree/Beam_sections

IMHO we should not use radio buttons to choose the cross sections. We should go for a combobox and change the task panel depended on the chosen section type. Similar to Part --> create primitives.


For my first material refernce shape implementation I used such a task panel ui. https://github.com/berndhahnebach/FreeC ... aterial.ui You can open it in a simple ui - viewer and change the shapes of the model combo box

[bernd]

Some enhancement of beam sections allowing user to select circular and pipe beam sections
https://github.com/makkemal/FreeCAD/tree/Beam_sections

IMHO we should not use radio buttons to choose the cross sections. We should go for a combobox and change the task panel depended on the chosen section type. Similar to Part --> create primitives.


For my first material refernce shape implementation I used such a task panel ui. https://github.com/berndhahnebach/FreeC ... aterial.ui You can open it in a simple ui - viewer and change the shapes of the model combo box

try attached one in an ui viewer ...

remove .txt

TaskPanelFemBeamSection.ui.txt

(13.47 KiB) Downloaded 165 times

[bernd]

@makkemal:

try https://github.com/berndhahnebach/FreeC ... meshregion

the section type is not yet updated with the combo box from task panel, means the type has to be chosen in property editor, but all length values can be edited in task panel already.

bernd