Stuck? 
support@mecway.com
support@mecway.com
Mecway
FEA
DaveStupple
About
- Username
- DaveStupple
- Joined
- Visits
- 1,098
- Last Active
- Roles
- Member
Comments
-
Thanks Victor, It's a thermal static, so is there even a deformed view? I checked all the rows and columns of nodes, all share the correct x, y, z coordinate as appropriate. I'll try elastic. This is not a big thing as I have a conformal mesh mesh m…
-
Eagle-eyed Victor spotted a typo in which an internal heat constraint had a value of 7.272727+15 when it should have been 7.272727E+15 What our production manager would call a code 18 fault, because the source of the problem is about 18 inches f…
-
Ha, Mecway is adding them up to come up with the displayed number. I feel silly now . Good spot, thanks Victor.
-
A minor oddity Victor in 27. The internal heat generation in the ladder does not agree with the value in the dialogue (separate post). I am having issues with this model, and I doubt that's anything to do with it, but you might be interested to look…
-
Thanks JohnM, appreciated. I could certainly give it a go. It will be ungainly. First I'll try all hex and tied contacts. I'm nearly in a position to run this.
-
Line 1 should read 'except a few wedges away from the heat load' and line 8, '5 to 7'.
-
Victor, Paul, I've got a model that fails with CCX thermal static, as I had before, because of small elements. If I scale it by +1000x it solves. But, as previously, my conversions were way out. I persevered and after (too many) hours found the ri…
-
Victor, Kenneth, Agreed, short and to the point. Not quite as short as this one: https://ams.org/journals/bull/1966-72-06/S0002-9904-1966-11654-3/S0002-9904-1966-11654-3.pdf
-
disla, Thanks for these ideas. I had seen your previous post, I wasn't sure if you concluded that it was inaccurate or if it was OK. Regarding viewfactors, I found this (sounds like hours of fun): "The calculation of viewfactors involves the solu…
-
Let me know if the link works
-
Pretty picture
-
Don't worry Victor, I didn't take your comments too seriously - if my response gave the opposite impression then apologies! Your assumption is a pretty good one, by the way. We are trying to reverse engineer a pretty old technology - some success bu…
-
Victor, that is quite possibly true. Tungsten filaments are incredibly well studied. I have got hold of a few older papers (and for something like this, the old ones are often the best), but it takes a finite amount of time to read and understand th…
-
Quick update: I improved the mesh as I was getting patchy temperature distributions, so smaller elements with better aspect ratio and made them quadratic. So we have a helical filament with two extended legs. Each leg finishes in a circular 'cut end…
-
I was thinking of using temperature-dependent electrical conductivity along with temperature-dependent thermal conductivity. After the DC current (maybe with a best-guess uniform elevated temperature) I would feed internal power into the therrmal st…
-
Mike, Victor, John, Thanks, I have extracted static i8 and just need to persuade someone with the right admin permissions to copy it over. I have neither the confidence not the permissions to attempt anything other than Victor's option 5! Will I ha…
-
For option 5, I downloaded Calculix_2.20_4win. There is no ccx_static_i8.exe, but there is ccx_static.exe. Should I use this, or am I missing something? Thanks, Dave
-
Sorry for lack of response but I'll try to chip in on Disla's last post. My understanding of Weibull is based on a single very good talk plus a couple of emails (and I still keep getting it wrong). It's a model that describes a probability of surv…
-
I had a quick try of Heaviside when Victor suggested it and - without too much detailed scrutiny - seemed to be doing approximately the right thing. When I have time to try this out in detail I'll report back. I have checked with a materials guy at…
-
@Victor, if you don't get me a liml by tomorrow then I'll get you the freedom of Bexhill and Eastbourne too. That'll teach you.
-
Hey Victor appreciate this, I'll send to support if that's cool? Is the Salome hdf file any good to you, or just the unv? Get me a liml file by tomorrow and I'll arrange the freedom of Hastings (for what it's worth...).
-
All that work to make this beautiful mesh and it's trapped in Salome. I'm supposed to have this analysis done by midweek. I can email the hdf and/or the unv file if anyone thinks they can open it in Mecway for me. I'll still have 1728 pyramid files …
-
Thanks Disla. I made some progress today, but in exporting from Salome as .unv I lose 1728 pyramids. I exported anyway and tried to import into Mecway and got the attached warning. Any ideas?
-
For the record, the partitioning of the disc for hexa meshing was initially my main obstacle. I achieved it this way: 1. Sketch at the origin (a hexagon with 6 slightly oversize arms) 2. Rotate and translate the sketch into place as near as dammit t…
-
By perseverance and watching YouTube videos (and even reading the Salome user guide), I have got SO close to where I want to be. But time is against me, so I still welcome help. I have managed to get the recessed disc meshed with hexa elements with …
-
Incidentally, I have tried on several occasions to join the Salome forum, but it seems I've got more chance of getting into the Freemasons.
-
Sergio, I'll email the geometry to you, as I can't share on here. I'll have to tidy up the tree a bit first.
-
Hello Manuel, do you have a working download link? The Salome website appears to have vanished without trace.
-
Our IT man did a fine job last time of getting Salome running on Windows after I had difficulty, and he created a little batch file to start it up properly. He was going to install the latest version today but the Salome website is down, possibly du…
-
No worries Victor, as long as you've brought a bottle. Yes, where the contact is. Thanks for the explanation. Yes, saw a few suggestions in earlier posts to turn off Automatic time stepping. When I did, the deformation near first contact was much …
