Search found 370 matches

Go to advanced search

by fandaL
Fri May 08, 2020 10:02 pm
Forum: FEM
Topic: Help with CalculiX *MASS card for my FEM models
Replies: 11
Views: 659

Re: Help with CalculiX *MASS card for my FEM models

Hello everyone, I've been trying to create a clamped-free beam model with lumped mass at the free end in CalculiX but i got many errors. Then i tried to create spring-mass system to understand how i can create mass model at node, again i got error as: "*WARNING in calinput: no elastic constants wer...
by fandaL
Fri May 08, 2020 7:51 pm
Forum: FEM
Topic: Help with CalculiX *MASS card for my FEM models
Replies: 11
Views: 659

Re: Help with CalculiX *MASS card for my FEM models

I suppose that you are doing frequency analysis of the model in your picture. See the attached analysis in FreeCAD where are few beam elements and manually added mass element to *.inp file above *STEP card: ** manually added mass element with id 33 at node number 22 *ELEMENT, TYPE=MASS , ELSET=EM 33...
by fandaL
Fri May 01, 2020 10:58 am
Forum: FEM
Topic: [Solved]CalculiX FEM Freq Analysis: No nodes found in Frd file.
Replies: 17
Views: 370

Re: CalculiX FEM Freq Analysis: No nodes found in Frd file.

Frequency is just above requested range, so no output is made by ccx. In *.inp file you can delete the range. Instead of *STEP *FREQUENCY 10,0.0,10000.0 (which limits frequency search to 0-10000 Hz) Use only *STEP *FREQUENCY 10 which will search for 10 lowest frequencies up to "infinity". (Isn't thi...
by fandaL
Mon Apr 20, 2020 8:21 pm
Forum: FEM
Topic: FEM: mesh: interested in STL volume mesh???
Replies: 3
Views: 201

Re: FEM: mesh: interested in STL volume mesh???

It could be useful in some cases. Currently one needs to make solid from Mesh first (in Mesh wb) which is with many faces cumbersome to work with. Complication is that to prescribe boundary conditions and loads you need to select manually all faces, since FreeCAD FEM wb applies them to geometry. The...
by fandaL
Mon Apr 13, 2020 1:08 pm
Forum: Open discussion
Topic: Start page Contribute card
Replies: 0
Views: 437

Start page Contribute card

Hi all, Free sw often contain button or link to donations on the introduction screen. I don’t see anything like that in FreeCAD. We offer help in Help menu and on the Start page, but we don’t ask for help :-o I would suggest to add link to Help menu to https://wiki.freecadweb.org/Help_FreeCAD and cr...
by fandaL
Sat Feb 29, 2020 11:25 pm
Forum: Python scripting and macros
Topic: STL (Mesh) voxelization to Array
Replies: 6
Views: 386

Re: STL (Mesh) voxelization to Array

Maybe a way would be a regular 3d grid of points an then doing a "point cloud merge" (calcuate the signed distance field of the points to the stl mesh, and afterwards filter the negative or positive pts away) with the stl mesh in cloudcompare which should result in a point cloud which lies within t...
by fandaL
Wed Feb 19, 2020 8:56 am
Forum: FEM
Topic: [SOLVED] Issue with CalculiX
Replies: 2
Views: 184

Re: Issue with CalculiX

Hi, Try to open it with the latest cgx. I have downloaded Launcher CL34-win64 from https://sourceforge.net/projects/calculixforwin/ and when opening I can chose different cgx versions: 2.5 fails, 2.10 even brakes frd file, 2.16 works well. I suppose that this is due to binary format used in the frd ...
by fandaL
Wed Feb 12, 2020 10:27 pm
Forum: FEM
Topic: Modelling and analyzing parts with composites ?
Replies: 18
Views: 800

Re: Modelling and analyzing parts with composites ?

On a related note, does FreeCAD have an "unfolder" whereby the user can click on a surface and FreeCAD will create a 2D pattern for pliable material that would cover the surface ? This would be another great tool for composites... I think not on simple click. But there were some trials about unfold...
by fandaL
Mon Feb 03, 2020 7:01 am
Forum: FEM
Topic: gmsh does not mesh a half cylinder as I would expect it
Replies: 8
Views: 323

Re: gmsh does not mesh a half cylinder as I would expect it

I have no problems with the file. Recreated mesh is uniform. OS: Linux Mint 19.3 (MATE/mate) Word size of OS: 64-bit Word size of FreeCAD: 64-bit Version: 0.19.19443 (Git) AppImage Build type: Release Branch: master Hash: 74680b8a15ad37e53eee0d341e95cd32631d88a3 Python version: 3.8.1 Qt version: 5.1...
by fandaL
Sat Jan 11, 2020 3:00 pm
Forum: FEM
Topic: Question about beam calculation with calculix
Replies: 23
Views: 992

Re: Question about beam calculation with calculix

thschrader wrote:
Sat Jan 11, 2020 2:18 pm
How can I find out the ccx version?
When you click to run CalculiX from FreeCAD, there is a log window which contains version information.

Go to advanced search