1/31/2024 12:12 PM
Stress:
Displacement:
Min Factor of Safety: 1.9
Notes
- Previously, min safety factor ~0.7 → I increased the bonded areas around screws from 0.02” (radii) to 0.05” (radii) which made a big difference. There used to be a little red around the screw holes and now there is no red. How much contact area should I actually use?
- Inside of hole now:
- Note: I had to increase the contact area for ALL holes or it was mad :/ something about not being constrained. Also fixtures were mad but got fixed
- Used recommended method for fixtures holes, most stress around the holes look like this:
- However holes directly under the plates on the bottom frame look like this (there’s a little red):
- Concerns: all the arms are still bonded. Problem?? Also need to do this with mission package tube/forces it will experience
2/1/2024 1:21 AM
Stress:
Displacement:
Min Factor of Safety: 2
Notes
- This was run with the little arms bonded together where the screws would go instead of the whole thing being bonded
- Displacement plot of arms:
- Minor displacement but looks fine
- Most stress still around bottom holes:
- Next Steps
- Try partially retracted
- Try with ⅛” thick aluminum plates
- Extend bottom frame
- Maximize frame mass saving cuts
2/1/2024 1:53 AM
Stress:
Displacement:
Min Factor of Safety: 2.4
Notes:
- Concluded that it does in fact experience less stress when plates are partially retracted (higher minimum safety factor)
- Force at hole:
- Next Steps
- Try with ⅛” thick aluminum plates
- Extend bottom frame
- Maximize frame mass saving cuts
- Try to get more to stick out of MPT
- Add hole for wires
2/1/2024 1:53 AM
Stress:
Displacement:
Min Factor of Safety: 2.2
Notes:
- Made plate ⅛” thick
- made bottom frame slightly wider but not enough:
- Next Steps
- Extend bottom frame more
- Maximize frame mass saving cuts
- Try to get more to stick out of MPT
2/3/2024 12:25 PM
Stress:
Displacement:
Min Factor of Safety: 0.95
Notes:
- Made arms longer
- Made walls of aluminum spacer thinner
- These holes not under as much stress
- Unsure where the red is