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by josheeg
Sat Sep 01, 2018 11:29 pm
Forum: FEM
Topic: Assembly2 assembly meshing of boolion unioned parts min size .1 in or .05" in never seems to finish windows shows not re
Replies: 33
Views: 1812

Re: Assembly2 assembly meshing of boolion unioned parts min size .1 in or .05" in never seems to finish windows shows no

So if the frame can scale and I can test the electronics with a lighter frame many it could be made of pvc tube and answer some questions and be moved to the carbon fiber tube frame then. I found some PVC tube properties here. http://www.matweb.com/search/datasheet_print.aspx?matguid=bb6e739c553d4a3...
by josheeg
Fri Aug 24, 2018 4:09 pm
Forum: FEM
Topic: Assembly2 assembly meshing of boolion unioned parts min size .1 in or .05" in never seems to finish windows shows not re
Replies: 33
Views: 1812

Re: Assembly2 assembly meshing of boolion unioned parts min size .1 in or .05" in never seems to finish windows shows no

Oh so the part of the model that looks like a wireframe mesh is the part past the set limit. This is very helpful to see when the model is past it's normal limits.
by josheeg
Thu Aug 23, 2018 3:52 pm
Forum: FEM
Topic: Assembly2 assembly meshing of boolion unioned parts min size .1 in or .05" in never seems to finish windows shows not re
Replies: 33
Views: 1812

Re: Assembly2 assembly meshing of boolion unioned parts min size .1 in or .05" in never seems to finish windows shows no

600 ksi to ~4k Mpa shown in this online calculator. Then I looked at some of the different analysis results mesh radio button options for stress and the max seems well below 4k Mpa so it should not break under loading? 600ksitompadragonplatecf.png vonmasstressmpa.png maxprincipalstress.png maxsheer6...
by josheeg
Thu Aug 23, 2018 2:05 pm
Forum: FEM
Topic: Assembly2 assembly meshing of boolion unioned parts min size .1 in or .05" in never seems to finish windows shows not re
Replies: 33
Views: 1812

Re: Assembly2 assembly meshing of boolion unioned parts min size .1 in or .05" in never seems to finish windows shows no

I see in the wikipedia article

"This stress is called the tensile stress because every part of the object is subjected to tension. The SI unit of stress is the newton per square meter, which is called the pascal.
1 pascal = 1 Pa = 1 N/m2"

So I should be looking for pascal or N/m^2?
by josheeg
Thu Aug 23, 2018 6:26 am
Forum: FEM
Topic: Assembly2 assembly meshing of boolion unioned parts min size .1 in or .05" in never seems to finish windows shows not re
Replies: 33
Views: 1812

Re: Assembly2 assembly meshing of boolion unioned parts min size .1 in or .05" in never seems to finish windows shows no

600 ksi is that a unit it is in tensle strength. They have data sheets at dragon plate.
Will it compare with my analysis?
Screenshot_2018-08-23-02-22-54.png
Screenshot_2018-08-23-02-22-54.png (345.75 KiB) Viewed 517 times
by josheeg
Wed Aug 22, 2018 5:25 pm
Forum: FEM
Topic: Assembly2 assembly meshing of boolion unioned parts min size .1 in or .05" in never seems to finish windows shows not re
Replies: 33
Views: 1812

Re: Assembly2 assembly meshing of boolion unioned parts min size .1 in or .05" in never seems to finish windows shows no

Wow impressive analysis. I got the 98 in tube with carbon fiber material under 100 newtons abs deflection. Does when it turns red show it will break? Or when will it show signs and wear? 98flexunder100N.png If red means it will break the next shorter tube may need to be used because when a kite is s...
by josheeg
Wed Aug 22, 2018 5:04 pm
Forum: FEM
Topic: Hi bug in fem materials adding 0swhen tabbing to the next field. ??
Replies: 3
Views: 285

Re: Hi bug in fem materials adding 0swhen tabbing to the next field. ??

Bug Freecad fem material windows 10 freecad 0.17 release will try 0.18 but it is dev create a cube in part 1” go to fem workbench analysys add material density I put a decimal point in after 1700. and 3 zeros apeared youngs model number I set to 3333333. psi modulus I set to .2 I save the material a...
by josheeg
Mon Aug 20, 2018 4:45 am
Forum: FEM
Topic: Hi bug in fem materials adding 0swhen tabbing to the next field. ??
Replies: 3
Views: 285

Hi bug in fem materials adding 0swhen tabbing to the next field. ??

[bug]freecad v 0.17 windows 10 release coppy of freecad when putting a value in fem material new more 0s appear after tabbing to the next field. Gui bug or operator error? :geek: :ugeek: [/bug]
by josheeg
Sat Aug 18, 2018 2:27 pm
Forum: FEM
Topic: Assembly2 assembly meshing of boolion unioned parts min size .1 in or .05" in never seems to finish windows shows not re
Replies: 33
Views: 1812

Re: Assembly2 assembly meshing of boolion unioned parts min size .1 in or .05" in never seems to finish windows shows no

I got your calculation Harryvl into a spreadsheet the deflections mm come out very close probably spreadsheet rounding errors. Is there a point where the deflection shows it will proabably start to show signs of breaking or a point to avoid? tubecalc.png I got the updated specifications from dragonp...

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