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by UR_
Wed Jun 07, 2017 3:35 pm
Forum: Help on using FreeCAD
Topic: Help on drawing a worm gear with its involute gear
Replies: 21
Views: 4442

Re: Help on drawing a worm gear with its involute gear

Hello franceecad,
some weeks ago, there was a similar question on this forum.

Please have a look.
https://forum.freecadweb.org/viewtopic.php?f=3&t=13906
by UR_
Mon Jun 05, 2017 6:42 pm
Forum: FEM
Topic: Issues with GMSH 2.16 and 3.0.2 in Ubuntu 14.04.5 LTS
Replies: 6
Views: 1071

Re: Which GMSH version is appropriate for FreeCAD 0.17?

Hello joha2, looks like usual. :? Do i miss something? ScreenShotEdgeRefined.png ScreenShotVertexRefined.png CubeEdgeRefined.FCStd CubeVertexRefined.FCStd Done with: Gmsh 3.0.2 OS: Windows 10 Word size of OS: 64-bit Word size of FreeCAD: 64-bit Version: 0.17.11232 (Git) Build type: Release Branch: m...
by UR_
Mon Jun 05, 2017 9:35 am
Forum: Help on using FreeCAD
Topic: Edge selection erratically / fillet bug?
Replies: 7
Views: 695

Re: Edge selection erratically / fillet bug?

Hello bejant, i think i can reproduce this behaviour. Here a simplified model: ScreenshotWith3EdgesFillet.png File: FilletAt2StepsTest.FCStd As you can clearly see there are three fillets. And here are the taskviews from "Fillet000" and "Fillet001" TaskViewFillet001.png TaskViewFillet000.png Buy two...
by UR_
Fri Jun 02, 2017 2:09 pm
Forum: FEM
Topic: Now there are nonpositive jacobian
Replies: 12
Views: 1361

Re: Now there are nonpositive jacobian

Does it mean we changed the precision to a too much height Hello bernd, there is a overhead in iostream caused by signs, decimal separator and exponents. please have a look at this example // floatfield #include <iostream> // std::cout, std::defaultfloat int main () { double a = .123456789012345678...
by UR_
Thu Jun 01, 2017 11:37 pm
Forum: FEM
Topic: Now there are nonpositive jacobian
Replies: 12
Views: 1361

Re: Now there are nonpositive jacobian

*Node, NSET=Nall ... 130, 85.06, -14.75, -3.09452848545541e-014 Hello fandaL, "-3.09452848545541e-014" is an illegal floating point format ccx reads only F20.0 (i. e. Fortran floating point field 20 chars wide) pending chars are not accepted, that means -3.09452848545541e-014 becomes -3.09452848545...
by UR_
Sun May 21, 2017 3:49 pm
Forum: Forum in Deutsch
Topic: Ebenen im Raum (für Kurvenbahn in Zylinderwandung)?
Replies: 5
Views: 730

Re: Ebenen im Raum (für Kurvenbahn in Zylinderwandung)?

Hallo Henning, hier sollten eigentlich saubere Übergänge sein. (Bitte die Map-Modes der Sketches beachten) screenshot.png File: HelicalSlot.FCStd Version: OS: Windows 10 Word size of OS: 64-bit Word size of FreeCAD: 64-bit Version: 0.17.11091 (Git) Build type: Release Branch: master Hash: 1be8c73dca...
by UR_
Sat May 20, 2017 10:43 pm
Forum: Help on using FreeCAD
Topic: Crash on changing property
Replies: 2
Views: 322

Re: Crash on changing property

Hello, getting crash too. Works as expected on my side, if "use opengl vertex buffer" = OFF (Edit->Preferences->Display->3DView) otherwise report view shows up Unhandled unknown exception caught in GUIApplication::notify. tested with GeForce GTX960M (driver 382.05) and Intel HD4600 (driver 20.19.15....
by UR_
Wed Apr 19, 2017 4:29 pm
Forum: FEM
Topic: Element Membrane M3D6
Replies: 15
Views: 3093

Re: ERROR : too many cutbacks

Hello, Freecad bundles pretty outdated ccx.exe. So better upgrade to ccx2.12. If you have a 3d-shape like a balloon, and you have to avoid bending stress. then membrane elements are first choose. See http://www.dhondt.de/ccx_2.12.pdf Page 92 cit: 6.2.14 Three-node membrane element (M3D3) This elemen...
by UR_
Wed Apr 19, 2017 3:57 pm
Forum: FEM
Topic: ccxInputWriter vs. Faces
Replies: 16
Views: 2175

Re: ccxInputWriter vs. Faces

Hello, this is an example inp-file from http://www.dhondt.de/ccx_2.12.test.tar.bz2 Files in this archive should be used to validate your homemade ccx builds You are right "shell1.inp", see line 75 ... (DLOAD section) ** ** Structure: cantilever shell. ** Test objective: S8R elements, nodal thickness...
by UR_
Wed Apr 19, 2017 3:11 pm
Forum: FEM
Topic: Cyclic symmetry and contact
Replies: 7
Views: 2030

Re: Cyclic symmetry and contact

Hello fandaL, following your numbering there is no contact between blade 1 and blade 3. Please see this for further information https://www.youtube.com/watch?v=1Vzbd3kO7kU Screenshot Ceramic Blades - Turbine Engines_ A Closer Look - YouTube.jpg So you have to design a cutout of tubine disk instead. ...

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