Need help with ladder bars
What is everyone making ladder bars out of? Square tubing? Pics and info please! Mine will be on a dodge but any help is appreciated
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This thread is your friend.
lets see pics of traction bars - Competition Diesel.Com - Bringing The BEST Together If you want to add information to it just PM a moderator and they can open the thread again. |
Round will be your strongest geometric shape.
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^^^^^Not true...to generic of a statement.
A square vs a round of the same diameter vs width/height with the same wall thickness...the square is stronger in ever measure exempt torsion about its center. |
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Remember, the forces on them is almost solely rotating the axle and shoving the end of the bar into the frame. That being said, I'd build it out of round because it looks so much better! And I personally like the style with a shackle up front. a 'floating' ladder bar. Much less binding. |
The way the ends are connected will dictate the force in the bar...whether is is axial...compression/tension or moment...bending or both.
A shackle on one end and fixed at the axle...will make it a bending type. |
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Well are we talking 2" OD diameter, and 2" width/height? Or 2" OD diameter and 1.41" width/height? |
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Traction bars are a single floating bar in compression. |
2" OD vs 2" width/height
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So in general is a 2"OD stronger than 1.414" width/height? |
What about an I/H beam design?
(I want to go down in oraller history like Rudolph) Carbon fiber I beams I thought anything with rounded structures faired better under stress than to have corners (stress risers) Sent from my Moto X using Tapatalk |
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2" Solid bar 4' long in bending with a load of 3000N will only have a stress of 284.19MPa. 1.414" Solid Square bar 4' long in bending with a load of 3000N will have a stress of 473.69MPa http://img.photobucket.com/albums/v7...ps10l985yl.jpg http://img.photobucket.com/albums/v7...ps4pijxepf.jpg Quote:
And I-beams are better in certain applications. This might even be one. This is what I got for a 4' long, 3000N loaded I-beam that's 2" wide, 2" tall, and 1/2" thick. It has a stress of 184.72MPa (which is the best yet). These hate torsional loading, but as long as you're not trying to get axle articulation (think off-roading style twisting), this would fight your bending forces really well. http://img.photobucket.com/albums/v7...pss7kkl1rw.jpg |
Carbon fiber was an oraller joke. I'm sorry.
The opportunity to articulate and see compression load should be low I would think. Sent from my Moto X using Tapatalk |
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I'm not communicating so well......
Sent from my Moto X using Tapatalk |
Compression strut is far more simple...lighter and takes advantage of existing strength of the leaf spring.
Period. |
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http://lazarsmith.com/sitebuilder/im...38-611x342.jpg |
Yes...mount the lower rod end directly below the axle...3" is a nice offset.
36-48 inch bars are plenty long. 36 on a low truck...48 on a high truck. 1 1/2 Sch 40 Pipe is more than enough. |
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