Stuck? 
support@mecway.com
support@mecway.com
Mecway
FEA
Victor
About
- Username
- Victor
- Joined
- Visits
- 4,724
- Last Active
- Roles
- Administrator
Comments
-
disla: When you specify a force, it's the total force, which Mecway then distributes equally to the nodes. So use 5 lbf for 5 lb total. Usually it's better to use faces instead of nodes because that'll give a uniform distribution of force. Especiall…
-
Units The STEP file imports with correct units and is about 0.08 inch diameter as shown by Mecway's tape measure tool. It might also show 2 mm which is the same thing. The STL file is in mm, not inches. So when you open it, you have to choose mm fr…
-
Does the CCX Output button in the solver panel show anything? The text there is all generated by CCX. To check if CCX is producing any files: Turn on Tools -> Options -> CalculiX -> Same as the .liml file and solve again and see if any f…
-
Stress usually increases with mesh refinement so make sure it has converged to a reasonably constant value as the mesh density changes. If the stress is too low then the load might be too low. Confirm it by checking the sum of reaction forces. Clic…
-
The STEP mesher is a 3rd party program (Netgen) which doesn't do lines/beams unfortunately.
-
The beam twist is because Mecway doesn't currently read beam orientations from unv files so it sets them all to the default, which is the element's V axis parallel to the global XY plane. You can see the axes with the Show element axes button near t…
-
This sounds more like a geometry problem. I don't think FEA would help with it. The CCX solver has a capability of modelling radiation between surfaces. However the radiating surfaces have to emit uniformly in all directions, so it might work if yo…
-
If you manually paste the 3 panels' contents together into a .opt file, and run it directly in Gmsh, does that match Mecway? That would show if it's those extra lines doing it.
-
It's supposed to work like that. Just be careful of the options that Mecway adds in the top and bottom panels since some might conflict with your own (Mesh.Format). The .opt file sent to Gmsh is the contents of the 3 boxes concatenated together. I …
-
These asymmetric solutions look very much like what you get with the internal solver if the shift point is too low. Eg 1e-7 gave the attached picture. It also changes each time you solve, like what CCX is doing. I think CCX uses ARPACK the same as …
-
That doesn't sound right. Can you attach a liml file? von Mises stress is calculated by Mecway, using stress components from CCX so you should be able to add it after solving if the stress components are there. Right click the Solution branch of th…
-
I can't tell but it might have more advanced features than Mecway supports. It should be a line drawing/sketch with simple shapes like line, arc, LW polyline, ellipse, etc.
-
Those items in red in the original picture are for shell elements, so they won't be there with solids like this. Replace them with these by right clicking on the Solution branch: in-plane principal stress -> principal stress stress in element co…
-
Not currently, sorry.
-
Perhaps that was the modeler where it worked? That's meant to be OK for both CCX and the internal solver. However, the solution from CCX isn't supposed to contain any material properties so it shouldn't be possible to show the mass. I'm reluctant t…
-
Mecway 7 and 8 shear strain values from CCX are different from each other. The tensor ones are labelled with ε or E but the engineering ones use γ where γ_ij = ε_ij*2. ij stands for xy, yz, or zx. I don't know any training materials sorry, but ther…
-
For linear analysis, bonded contact can be on intersecting parts. Not sure what you mean by a "line contact" - I don't think two solid meshes can intersect at only a line - they would have some volume in common if they intersect. A limitation is tha…
-
That should be right. Stress stiffening plus gravity specified through the Mecway interface would turn a pendulum into an equivalent spring.
-
You might have attached the wrong image. Gravity should be OK though. You also have to add the stress stiffening under Loads & Constraints which triggers a *STATIC step to obtain stress which is used for a subsequent *FREQUENCY step. Custom st…
-
Some parts intersect each other which is probably why it's not meshing. To see where, make a surface mesh (which works), and use the cutting plane slider to look inside. No doubt, converting it to a single solid body in CAD as Andreas suggested will…
-
Thanks for pointing that out. It won't work for any CCX solutions. I'll disable that in the next version.
-
This is a known bug that will be fixed in the next version. It occurs if you use the mouse to pan in a mesh view, then change to geometry view and right click on something.
-
The strain in Mecway 8 is the taken from TOSTRAIN from CCX which according to the CCX manual is: "total Lagrangian strain for (hyper)elastic materials and incremental plasticity and the total Eulerian strain for deformation plasticity" Except Mecw…
-
Here are several ways: * Sliders as you said. * Right click the slider and choose Max/min and type in the values. * Select some nodes, faces, or elements. Right click one and choose Fit contour plot max/min to selection. This only works for s…
-
The fluid analysis is mainly there for legacy reasons. It's has quite limited features and I don't intend to enhance it much so I don't want to advertise it and have people accidentally choose Mecway for fluid analysis.
-
Thanks for the suggestions, Kaspers. 1,2,3 are tricky to design because they could make things worse as well as better. I'll keep what you say in mind to combine with what other people want. 4. I hope so soon. Also hopefully distributing coupling.…
-
It's like you suspect. The first 3 inputs are X, Y, Z components of the direction vector and the 4th "displacement" input is the "magnitude" of the displacement. See attached picture. I say magnitude in quotes because it's a signed value. The other…
-
Interesting question that puzzled me a while ago too. The thickness to size ratio refers to the size of the overall part, not the element. So refining a shell mesh doesn't change that ratio. Be aware though, that the usefulness of shells is usually…
-
I found a compiled multi-threaded CCX 2.11 (ccx_MT.exe) but it does have some problems which is why it's not included in Mecway. I don't quite remember but maybe frequency analysis results are sometimes wrong? I don't know how to compile it so it wo…
-
This is rigid body motion because it's not constrained. The solver tries to find any static solution but here there are many possible solutions for different positions and orientations and it just picks one randomly, which is not unreasonable becaus…
