EvolutionM - Mitsubishi Lancer and Lancer Evolution Community

Notices
Motor Sports If you like rallying, road racing, autoxing, or track events, then this is the spot for you.

Sup w/them 2024 Summer Projects?

Thread Tools
 
Search this Thread
 
Old Jan 31, 2022, 02:54 PM
  #4216  
EvoM Guru
Veteran: Army
Thread Starter
iTrader: (1)
 
Dallas J's Avatar
 
Join Date: Jul 2004
Location: Portland, Or
Posts: 5,893
Received 777 Likes on 592 Posts
Originally Posted by ViciousLSD
if you have a solid tire and the shock is mounted at the middle of the arms, sure. might you the sprung weight is only 225 lbs. quadrulple that and you still cant bend that threaded rod.
i think my 20 TON shop press can do it.
You just guessing here and you're wrong. The point is, these are within the realm of failure loads and fatigue life for what they are. Weather you like it or not, this is how engineering and math works.
Dallas J is online now  
Reply Like
Old Jan 31, 2022, 02:57 PM
  #4217  
EvoM Guru
iTrader: (2)
 
ViciousLSD's Avatar
 
Join Date: Oct 2011
Location: Houston
Posts: 3,261
Received 444 Likes on 379 Posts
Originally Posted by Dallas J
Double check my work... I could have gotten something wrong.

Force is based on the fact I know I can close the 2" gap from tire to fender on a hard hit. So Im compressing a 1450 lb/in spring by 2*0.76 inches. Dimensions of the arm are from one of my cad models, distance to thread/body intersection guessed at 125mm.
so looking at that. i think youre saying the threaded section takes about 2x the force as the ball joint. is that enough to bend it tho? 1000 lbs vs threaded section....
ViciousLSD is offline  
Reply Like
Old Jan 31, 2022, 03:01 PM
  #4218  
EvoM Guru
iTrader: (2)
 
ViciousLSD's Avatar
 
Join Date: Oct 2011
Location: Houston
Posts: 3,261
Received 444 Likes on 379 Posts
Originally Posted by Dallas J
You just guessing here and you're wrong.
*hypothetically speaking* not allowed in your class?

"math" is also theoretical IMO. We got rocket scientists screwing up rocket lauches ya know
ViciousLSD is offline  
Reply Like
Old Jan 31, 2022, 03:06 PM
  #4219  
EvoM Guru
Veteran: Army
Thread Starter
iTrader: (1)
 
Dallas J's Avatar
 
Join Date: Jul 2004
Location: Portland, Or
Posts: 5,893
Received 777 Likes on 592 Posts
Originally Posted by ViciousLSD
"math" is also theoretical IMO.
Nvm, go ahead and ignore math.
Dallas J is online now  
Reply Like
Old Jan 31, 2022, 03:11 PM
  #4220  
Evolved Member
iTrader: (29)
 
kyoo's Avatar
 
Join Date: May 2006
Location: US
Posts: 10,647
Received 243 Likes on 219 Posts
Originally Posted by kaj
Funny: I started out as an engineering student. I think all of here are like minded in that way, which is why we are still here.
obviously, not me, lmao banking/finance/econ/capital markets whooooo
kyoo is offline  
Reply Like
Old Jan 31, 2022, 03:13 PM
  #4221  
EvoM Guru
iTrader: (2)
 
ViciousLSD's Avatar
 
Join Date: Oct 2011
Location: Houston
Posts: 3,261
Received 444 Likes on 379 Posts
Originally Posted by Dallas J
Nvm, go ahead and ignore math.
This has threads. 3000 lbs rating

https://www.lowes.com/pd/National-Ha...eel/1002234848
ViciousLSD is offline  
Reply Like
Old Jan 31, 2022, 03:15 PM
  #4222  
EvoM Guru
Veteran: Army
Thread Starter
iTrader: (1)
 
Dallas J's Avatar
 
Join Date: Jul 2004
Location: Portland, Or
Posts: 5,893
Received 777 Likes on 592 Posts
Originally Posted by ViciousLSD
Good lord, you have no clue what you're talking about.
Dallas J is online now  
Reply Like
Old Jan 31, 2022, 03:24 PM
  #4223  
EvoM Guru
iTrader: (2)
 
ViciousLSD's Avatar
 
Join Date: Oct 2011
Location: Houston
Posts: 3,261
Received 444 Likes on 379 Posts
just condescending 'expert' comments. I'm still trying to figure out what the issue is, using math or experience with materials, your exact (math) numbers or hypotheticals. is it bending or stretching that youre concerned about?
just waiting on you to pick on my grammar next
ViciousLSD is offline  
Reply Like
Old Jan 31, 2022, 03:30 PM
  #4224  
EvoM Guru
Veteran: Army
Thread Starter
iTrader: (1)
 
Dallas J's Avatar
 
Join Date: Jul 2004
Location: Portland, Or
Posts: 5,893
Received 777 Likes on 592 Posts
Its not condescending, I tried to explain, gave good real world numbers of an example, and you come back with but this chain link holds 3000lbs.

Apples and stick
Dallas J is online now  
Reply Like
Old Jan 31, 2022, 03:35 PM
  #4225  
Evolved Member
iTrader: (29)
 
kyoo's Avatar
 
Join Date: May 2006
Location: US
Posts: 10,647
Received 243 Likes on 219 Posts
in any case, i like that the rear spindles give me independent toe adjustment now, so I'm not too concerned about basically adding extra camber
kyoo is offline  
Reply Like
Old Jan 31, 2022, 03:36 PM
  #4226  
EvoM Guru
iTrader: (2)
 
ViciousLSD's Avatar
 
Join Date: Oct 2011
Location: Houston
Posts: 3,261
Received 444 Likes on 379 Posts
Originally Posted by Dallas J
Its not condescending, I tried to explain, gave good real world numbers of an example, and you come back with but this chain link holds 3000lbs.

Apples and stick
you got fired up, ran the numbers, CAD... you could have just told me to use "5k" force on the the wheel, i would accept it lol, just get back the original topic. Can you bend a short threaded rod or not? run the numbers on that if you could please
ViciousLSD is offline  
Reply Like
Old Jan 31, 2022, 03:41 PM
  #4227  
EvoM Guru
Veteran: Army
Thread Starter
iTrader: (1)
 
Dallas J's Avatar
 
Join Date: Jul 2004
Location: Portland, Or
Posts: 5,893
Received 777 Likes on 592 Posts
Originally Posted by ViciousLSD
you got fired up, ran the numbers, CAD... you could have just told me to use "5k" force on the the wheel, i would accept it lol, just get back the original topic. Can you bend a short threaded rod or not? run the numbers on that if you could please
Thats the part you dont understand. The force alone isnt the whole picture. Its the moment, which requires knowing both force and geometry. That's why I drew a basic shear-moment diagram to explain.

And you're still picturing threads in tension/compression. These are in bending. Different world. How about you go find a race car with threads in bending.
Dallas J is online now  
Reply Like
The following users liked this post:
deylag (Jan 31, 2022)
Old Jan 31, 2022, 03:44 PM
  #4228  
EvoM Guru
iTrader: (2)
 
ViciousLSD's Avatar
 
Join Date: Oct 2011
Location: Houston
Posts: 3,261
Received 444 Likes on 379 Posts
Originally Posted by kyoo
obviously, not me, lmao banking/finance/econ/capital markets whooooo
also math/numbers keep things looking "ok" .... then 2007 came
ViciousLSD is offline  
Reply Like
Old Jan 31, 2022, 03:54 PM
  #4229  
EvoM Guru
iTrader: (2)
 
ViciousLSD's Avatar
 
Join Date: Oct 2011
Location: Houston
Posts: 3,261
Received 444 Likes on 379 Posts
Originally Posted by Dallas J
How about you go find a race car with threads in bending.
Those adjustable threads are everywhere and is used widely by individual/small team racers. professional teams wont use them because they manufacture their own parts to exact dimensions
so if youre going to design adjustable control arms, you would use adjustment holes and bolts then?
ViciousLSD is offline  
Reply Like
Old Jan 31, 2022, 04:01 PM
  #4230  
EvoM Guru
Veteran: Army
Thread Starter
iTrader: (1)
 
Dallas J's Avatar
 
Join Date: Jul 2004
Location: Portland, Or
Posts: 5,893
Received 777 Likes on 592 Posts
Originally Posted by ViciousLSD
Those adjustable threads are everywhere and is used widely by individual/small team racers. professional teams wont use them because they manufacture their own parts to exact dimensions
so if youre going to design adjustable control arms, you would use adjustment holes and bolts then?
Do you not comprehend the difference between tension/compression and bending?

Im going to go ahead and be done with this. The math is there for scrutiny, and its an industry standard to keep threads out of bending.
Dallas J is online now  
Reply Like



Advanced Search
Quick Reply: Sup w/them 2024 Summer Projects?


Reply Closed Thread Share

All times are GMT -7. The time now is 08:45 PM.