Search found 440 matches
- Fri Jul 30, 2021 11:15 am
- Forum: FEM
- Topic: Reaction force request
- Replies: 27
- Views: 9148
Re: Reaction force request
The output in *.dat file is a sum of reaction forces (with components Fx, Fy, Fz). E.g. if you have a beam fixed at both ends and you use one Fixed Constraint object for both ends, total reaction force (as printed) will correspond to external load. If you will use one Fixed Constraint object for one...
Re: Quad Mesh
tried this again ... - set "Recombine All" to True - set "Recombination Allgorithm" to Blossum full-quad" Works gread for first order meshes. Quad4 faces are meshed by Gmsh. But it fails for second order meshes. The quadratic edges will be meshed but the faces are linear. T...
- Thu Jul 22, 2021 8:22 am
- Forum: FEM
- Topic: Solver for Mystran
- Replies: 107
- Views: 24184
Re: Solver for Mystran
Official Mystran 12.1 documentation
https://www.mystran.com/forums/showthread.php?tid=39
does not know CTRIA6. There are only CTRIA3 and CQUAD4 (and CTRIA3K and CQUAD4K for thin variants without transverse shear deformation).
https://www.mystran.com/forums/showthread.php?tid=39
does not know CTRIA6. There are only CTRIA3 and CQUAD4 (and CTRIA3K and CQUAD4K for thin variants without transverse shear deformation).
- Tue Jul 13, 2021 11:01 am
- Forum: FEM
- Topic: Hinges between plates/shells
- Replies: 47
- Views: 9664
Re: Hinges between plates/shells
Corrected to: $-------SID-----P-------EID1----THRU----EID2----7-------8-------9-------+------- PLOAD2 350 -10000.026 THRU 85 Going down and NU=0.17 It is 3.55 um now. Still small. The pressure is applied on elements 26-85. If I count well, that is 60 elements. Looking at the picture, top face conta...
- Tue Jul 13, 2021 6:46 am
- Forum: FEM
- Topic: Hinges between plates/shells
- Replies: 47
- Views: 9664
Re: Hinges between plates/shells
Hinge1CQUAD4.dat.txt contains only the load by 10 Pa, if the units are m, N, Pa
Code: Select all
$-------SID-----P-------EID1----THRU----EID2----7-------8-------9-------+-------
PLOAD2 350 10.00 26 THRU 85
- Mon Jul 12, 2021 9:09 pm
- Forum: FEM
- Topic: Hinges between plates/shells
- Replies: 47
- Views: 9664
Re: Hinges between plates/shells
To be easier for hand modifications, I used very course mesh (two quad4 elements per width). concrete_plates_test.FCStd Hand modifications of the inp file: Nodes on the hinge edges are duplicated: 1, 3, 5, 7, 11, 17 duplicated as 40-45 Elements on the top face with replaced nodes: element 45, nodes ...
- Mon Jul 12, 2021 8:29 am
- Forum: FEM
- Topic: Cannot get FEM Frequency analysis to work.
- Replies: 2
- Views: 1029
Re: Cannot get FEM Frequency analysis to work.
Hello, your file is OK. It seems that you have same FC version and same problem as this guy https://forum.freecadweb.org/viewtopic.php?f=18&t=58792 Try different CalculiX as UR_ suggested https://forum.freecadweb.org/viewtopic.php?f=18&t=58792&hilit=frequency&start=10#p506164 or down...
- Sun Jul 11, 2021 11:04 am
- Forum: FEM
- Topic: Simulating Low Youngs Modulus <0.5MPa Problem Limitation
- Replies: 10
- Views: 2787
Re: Simulating Low Youngs Modulus <0.5MPa Problem Limitation
Hello, there is fixed precision when FreeCAD writes modulus in MPa to the CalculiX input file. You can edit it manually before running the analysis: Click "Edit .inp file" Find *ELASTIC card close to the end of the file On the next line, there are elastic modulus in MPa and Poisson number ...
- Sun Jul 11, 2021 10:45 am
- Forum: FEM
- Topic: Hinges between plates/shells
- Replies: 47
- Views: 9664
Re: Hinges between plates/shells
Possible approach is to separate elements by duplicating nodes on the hinge edge, so that elements on one side does not share nodes with elements on the other side. Next, you would generate *EQUATIONs on duplicate nodes to connect translation DOF, so that rotation DOF are independent (hinged). You c...
- Sat Jun 26, 2021 2:46 pm
- Forum: FEM
- Topic: Fem constraint contact
- Replies: 147
- Views: 48247
Re: Fem constraint contact
Good afternoon, I'm not proficient in contact analysis, but I don't think "huge contact-zone" is an issue. I did some testing with 1st order elements. It is a beam 40x10x2 mm, fixed on one end, loaded with 1000 N on the other, from steel E=210 GPa. In the comparison below, there are maxima...