pre-stressed pre/post-tensioned concrete bridge

[bernd]

from gmsh documentation on http://gmsh.info/doc/texinfo/gmsh.html

Coherence Mesh;

Removes all duplicate mesh vertices.

Screenshot_20180820_183506.png (14.12 KiB) Viewed 346 times

[HarryvL]

Final test with contact included looks fine in FreeCAD:

Contact_No_Coherence_CompSolid_Contact.png (110.9 KiB) Viewed 342 times

but the same in ParaView shows that after export the nodes get connected again ?!?!?

Contact_No_Coherence_CompSolid_Contact_PV.png (262.1 KiB) Viewed 342 times

Contact_No_Coherence_CompSolid_Contact_PV_2.png (323.66 KiB) Viewed 342 times

Anyway, FreeCAD, GMSH and CCX respond in a predictable way.

[HarryvL]

But when I create a small gap, as suggested by UR_, then also PV displays a sensible results:

Contact_No_Coherence_CompSolid_Contact_PV_3.png (291.42 KiB) Viewed 341 times

If there is a Paraview guru amongst us .... is there a Coherence option in ParaView too? It would save me adding small gaps at all contact surfaces, with potential mistakes.

[HarryvL]

Here is the FC file for those who want to play with it

Contact_003.fcstd

(647.49 KiB) Downloaded 13 times

[bernd]

seams not to happen on pipeline creation ...

FreeCAD standard result object:

Screenshot_20180820_212211.png (466.67 KiB) Viewed 332 times

FreeCAD VTK result pipeline:

Screenshot_20180820_212343.png (730.06 KiB) Viewed 332 times

but at exporting to VTK file format ... Did you use FreeCAD Vtk pipline export to exort to VTK?

bernd

[HarryvL]

I used File > Export > FEM Result VTK .... is there another way?

[HarryvL]

seams not to happen on pipeline creation ...

FreeCAD standard result object:

Screenshot_20180820_212211.png


FreeCAD VTK result pipeline:

Screenshot_20180820_212343.png




but at exporting to VTK file format ... Did you use FreeCAD Vtk pipline export to exort to VTK?

bernd

Aaaaaaaaa ... the fcstd file I posted was with the small gaps !!!! That works well in ParaView. The one with zero gap gives the sticking nodes.

[HarryvL]

I re-did it with zero gap and you are right (of course ) the VTK pipeline works well, but the exported results to ParaView not ?!

VTK_Pipeline.png (425.24 KiB) Viewed 325 times

Here the file I used for zero gap:

Contact_004.fcstd

(121.76 KiB) Downloaded 12 times

[bernd]

here is where this happens ATM: https://github.com/FreeCAD/FreeCAD/blob ... #L438-L473

[HarryvL]

Post tensioning ...


I am running out of time (and patience ). I attach the file for those who want to try. This should work "as is". Actual post-tensioning would be the next step, but not before this simple load case converges.

CB_Post_Rev1.fcstd

(133.29 KiB) Downloaded 18 times

CB_Post_Rev1.fcstd

(133.29 KiB) Downloaded 18 times