Search found 3129 matches

by thschrader
Thu Mar 28, 2024 7:46 am
Forum: FEM
Topic: fcVM workbench
Replies: 92
Views: 6825

Re: fcVM workbench

HarryvL wrote: Wed Mar 27, 2024 5:46 pm Same model but finer mesh? Can you share the mesh settings?
...
Here is the file.
BTW: this is the correct flange of the mast who fell from the tower,
as posted previous. The other one was from a different site, my fault.
Wyk_Rohrstoss_linear.FCStd
(38.18 KiB) Downloaded 2 times
by thschrader
Wed Mar 27, 2024 4:40 pm
Forum: FEM
Topic: fcVM workbench
Replies: 92
Views: 6825

Re: fcVM workbench

Just updated fcvm. This is what I get. There is no contour visible in the CSR-plot (both with result/pipeline object) The max CSR-values are different, see curve plot and result window. Maybe I did something wrong. I will have a closer look at the weekend. You can visualize the stress-triaxiality in...
by thschrader
Sat Mar 23, 2024 10:37 pm
Forum: Announcements & Features
Topic: Farewell
Replies: 10
Views: 1812

Re: Farewell

Due to recent unfortunate events, I will no longer be participating in forum topics. My heartfelt thanks to all the developers for their many improvements since I joined at V0.13. Please feel free to contact me via private message for any further communication. What a strange statement. Who is stop...
by thschrader
Sat Mar 23, 2024 12:14 pm
Forum: CfdOF / CFD
Topic: Problem starting a simulation
Replies: 1
Views: 202

Re: Problem starting a simulation

Here is an example, maybe it helps...
viewtopic.php?p=693921#p693921
by thschrader
Thu Mar 21, 2024 10:16 pm
Forum: Users Showcase
Topic: Extra geometry for the Thingverse "Utility Ship"
Replies: 13
Views: 2508

Re: Extra geometry for the Thingverse "Utility Ship"

jamtek wrote: Tue Mar 19, 2024 5:00 pm Great job on pulling the model into FreeCad and refining it. Is it for display only, or will there be sea trials? :D
Yeah, fascinating model.
A sea trial would be great.
by thschrader
Tue Mar 19, 2024 11:29 pm
Forum: FEM
Topic: fcVM workbench
Replies: 92
Views: 6825

Re: fcVM workbench

... However, I still don't know the history of how these two competing definitions came about. Take a pragmatic approach: Your definition of plasticity is correct. Point. To investigate the history of the formulae is a rabbit-hole. For me it is interesting that (local) stress peaks can be eliminate...
by thschrader
Tue Mar 19, 2024 7:52 am
Forum: FEM
Topic: fcVM workbench
Replies: 92
Views: 6825

Re: fcVM workbench

... Having said that, using such a high value in a practical structural analysis (geometric linear without extreme mesh refinement and uncertainty about local detailing - see Thomas’ weld profiles) would (in my view) be grossly non-conservative. I would therefore stick with deriving alpha from the ...
by thschrader
Sun Mar 17, 2024 5:53 pm
Forum: FEM
Topic: fcVM workbench
Replies: 92
Views: 6825

Re: fcVM workbench

I do not really understand the triaxiality concept. When doing a hand calculation (with stress/strain tensors at yellow "X") I get a very low triaxiality, as to expect, nearly pure shear. PEEQ is 5%, analog to IdeaStatica the plastic limit is reached. In the end I get a epsilon_cr of 32%. ...
by thschrader
Thu Mar 14, 2024 4:31 pm
Forum: FEM
Topic: fcVM workbench
Replies: 92
Views: 6825

Re: fcVM workbench

Just updated the fcVM-wb, nice! @HarryvL : For me the point is, that I can run a linear analysis. If the stresses exceeding the limit fy, start fcVM and do the nonlinear analysis. Which btw runs much faster than ccx with nonlinear options. My loads allready contain the safety-factors from the static...
by thschrader
Wed Mar 13, 2024 2:12 pm
Forum: FEM
Topic: fcVM workbench
Replies: 92
Views: 6825

Re: fcVM workbench

Just updated the fcVM-wb. I found this interesting article about the triaxiality concept: https://publications.vtt.fi/julkaisut/muut/2016/VTT-R-04741-16.pdf What gives me a headache is the wide range of alpha-values in table 4, used for EQ.4. Since the loading in my FEM-model contains allready the s...