Stuck? 
support@mecway.com
support@mecway.com
Mecway
FEA
Victor
About
- Username
- Victor
- Joined
- Visits
- 4,758
- Last Active
- Roles
- Administrator
Comments
-
Any license problems should be communicated clearly, and not through weird crashes. @kuhl. Do you mind trying version 15 (https://mecway.com/download/oldversions/mecway150.msi) which was the last version that worked for another person who had these…
-
Yea, it uses the impossibly high plastic strain of 1000 to ensure you never reach that because it's supposed to be an idealized infinite straight line. I don't think there are any problems with such a high value and CCX would linearly interpolate at…
-
Looks like the reason those holes are faceted is "Fit midside nodes to geometry" is turned off for the two plates' meshing parameters.
-
Nice picture. You can use radiation with CCX in thermal transient. There was some reason I couldn't get it to work right in steady state so I disabled that option.
-
@JohnM, this probably won't help with your big models, but going up to 5+ layers thick of hex8 can get reasonable in bending, at least for elastic behavior. The idea is to make sure individual elements don't carry any significant bending load to avo…
-
@disla, I don't want to add a plastic laminate option at this stage because I think being able to input the data in the GUI would add little value compared to writing CCX cards directly. Without a redesign of how laminate data is represented, there …
-
Here's the same model converted to quad8. I did this by setting the Z-coordinates of all nodes to 0 then merging them, and setting thickness in the material properties.
-
Excuse me, I'm normally all serious on here but that inventing the light bulb thing was meant to be a joke :P I assumed you were working on some sciency heater for x-rays or something.
-
I saw that too. For some reason, the element isn't present in the .frd file. Maybe user elements disappear like that? Not sure but I think it's a CCX issue.
-
Mecway automatically converts collapsed elements to their equivalent shape if one exists, so that's why imported collapsed hexes become pyramids. A way to look for missing internal elements is set the 3 view options shown in this picture. I delete…
-
If it's because of a lot of iterations, making the nonlinearities more gentle can save a lot, like lower contact stiffness, higher tangent modulus on plastic materials, and "loose" parts constrained a bit harder with elastic supports.
-
Hello Pier. Here's a Mecway file to generate an equivalent .inp file. I've defined the unsupported features by hand in the CCX branch of the outline tree.
-
Thanks for the update. Good to hear it worked. Just one question though, are you inventing the light bulb? Because I think there's some prior art in that area.
-
On second thought, I forgot that we have temperature dependent electrical conductivity so you wouldn't have to assign materials element by element. Should be pretty simple as long as there aren't any severe nonlinearities that make convergence slow.
-
If the temperature is fairly uniform, that seems OK, but otherwise it's going to be a nightmare picking out groups of elements of similar temperatures to assign the same material to. It should be possible to write a Python script to automate that b…
-
@disla, yea, it just varies the deformation scale factor symmetrically between + and - some value to animate it. Mecway chooses what it thinks is a reasonable amplitude based on the displacements and geometry so it might be different sometimes.
-
Since those posts, Mecway now has folders (called groups) for loads, but still not cofactors yet. Thanks for reiterating the need for them. The Displacement and Node rotation constraints allow you to choose the DOFs to constrain in either global o…
-
Change to Select faces or Select elements mode and turn off Tape measure.
-
@LHartley For an existing mesh? Not that I know of. the .XYZ format is also for a new mesh, so the nodes won't be linked to existing elements. You can modify an existing mesh for both component assignments and node coordinates fairly easily with a …
-
@LHartley You can do that with the .XYZ file format. It's a CSV file with the 3 coordinates for each node on each line.
-
Results extraction at a given coordinate without node # Interpoloates stress XX at the point in global coordinates (X, Y, Z) = (0.5, 0, 0.5) assert mw.version() >= 18, "Wrong Mecway version" value = solution.interpolate("stressxx", Vector(0.5,0…
-
@Mishal. The internal solver supports all the built-in beam section shapes with Dynamic Response 3D, but not 2D. You can use 3D instead of 2D for everything except plane strain.
-
> Could it be a rounding / quantisation type issue with the colouring? You're absolutely right. I've managed to reproduce it now. There is a fudge which causes a relatively small spillover of color outside the specified range. Normally, it's not…
-
This error "cp: cannot stat [...] ccx_2.19': No such file or directory" or "cp: cannot stat [...] ccx_2.19_MKL': No such file or directory" means the final binary failed to be built. Look in x64/buildlog.txt and you should find error messages at…
-
I've had another think about this and it could be just the effect of the low contour plot resolution, which in your example is a single color for each element face. That single color is an average of the node values so individual nodes may be lower …
-
Yea, that doesn't look right. Could you send me the file? Possibly by email if it's confidential.
-
Oh, Guido must have fixed that. Yes, should be fine to update to at least CCX 2.19 or 2.20. I still use 2.19.
-
If the effect of the tracks is just to guide it and they apply negligible lateral (X) force, then it doesn't change anything because they skates are probably still free to slide small distances laterally in their channels as the truss deforms. You m…
-
Usually you can. I didn't know there was a limit of 100 elements sharing a node. I just tried with more than 100 beams sharing a node with a shell and it worked. So I'm not sure what the limit really is. What CCX version are you using?
-
Regarding constraints, if the skates are free to roll/slide in any direction on the floor, you should only constrain the vertical (Y) direction to represent them. That leaves rigid body motion in the other 3 degrees of freedom (translation and rotat…
