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    Roll cage calculator/tubing strength article
    #1
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    Fond this on Pirate4x4, could be a useful tool for choosing tubing.

    https://www.roguefab.com/calculator.php

    There is also a tech article on benders/bending, and how the use of different radi dies affects the strength of the part.
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    Re: Roll cage calculator/tubing strength article
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    The Bob Ross of MBN Bullnerd's Avatar
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    Dont think a whole lot of people are going to agree with their "sample roll cage" design.
    "Speed is time-time is speed"-Dennis Hopper

    Quote Originally Posted by TALON View Post
    did you use a special bigfoot camera or something ,you know all blurry could be a tree stump kinda thing .
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    Re: Roll cage calculator/tubing strength article
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    Senior Member custom39's Avatar
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    [quote=Bullnerd;253254]Dont think a whole lot of people are going to agree with their "sample roll cage" design.[/
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    Re: Roll cage calculator/tubing strength article
    #4
    The Bob Ross of MBN Bullnerd's Avatar
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    Thats what i said!
    "Speed is time-time is speed"-Dennis Hopper

    Quote Originally Posted by TALON View Post
    did you use a special bigfoot camera or something ,you know all blurry could be a tree stump kinda thing .
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    Re: Roll cage calculator/tubing strength article
    #5
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    While its handy to have a formula, deciding what numbers are a good representation of the frame under impact is the hard part (what load value to use). Not to mention the hazard factor, or more commonly known as the safety factor. The grade of steel and manufacturing quality is another large factor. Usually, the load should not go beyond 50% ultimate strength and 67% yield strength for primary loads (bending, axial, etc.). As always, its a bit more involved than a simple formula.....
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    Re: Roll cage calculator/tubing strength article
    #6
    Seņor Banned Member Chikin's Avatar
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    Quote Originally Posted by Bullnerd View Post
    Thats what i said!
    Ha ha. Bull I would say custom agrees???
    Ok now I will too. So it's plus 3.

    Why would the use a center tube in the pic as "this one"
    I see they want and example but I'm sure if they used the out side tube it would be a different article. And more stress that would give different results. Maybe it's early. I will re read it after 3 mountain dews
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    Re: Roll cage calculator/tubing strength article
    #7
    Intense Moderator Rat4020's Avatar
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    The question is not if its gona roll. Its when ..

    That be some kind of church cruzzer or commuter bike thingy ?
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    Re: Roll cage calculator/tubing strength article
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    Quote Originally Posted by Custom39 View Post
    Dont think a whole lot of people are going to agree with their "sample roll cage" design.
    Quote Originally Posted by Bullnerd View Post
    Thats what i said!
    Quote Originally Posted by Chikin1974 View Post
    Ha ha. Bull I would say custom agrees???
    Ok now I will too. So it's plus 3.

    Why would the use a center tube in the pic as "this one"
    I see they want and example but I'm sure if they used the out side tube it would be a different article. And more stress that would give different results. Maybe it's early. I will re read it after 3 mountain dews
    Here is text straight from the "calculator.php" page:

    "This cage is just a simple example for teaching purposes, we don't recommend you build a cage like this."

    We made the calculator primarily for comparing materials, but also to look at individual parts of a cage under varying loads that can be manipulated. It is not an FEA package and it is not meant to be a thogough analysis. Most poeple building their own stuff just do what looks good with NO calculations. This is a free step in the right direction. Please don't misinterpret our intentions.
    Last edited by RogueFab; 12-28-2012 at 04:28 PM.
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    Re: Roll cage calculator/tubing strength article
    #9
    The Bob Ross of MBN Bullnerd's Avatar
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    See,even he disagrees with it!
    "Speed is time-time is speed"-Dennis Hopper

    Quote Originally Posted by TALON View Post
    did you use a special bigfoot camera or something ,you know all blurry could be a tree stump kinda thing .
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    Re: Roll cage calculator/tubing strength article
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    Quote Originally Posted by Bullnerd View Post
    See,even he disagrees with it!
    Haha

    I am going to put the "roll cage example" farther down on the page and put more emphasis on it being a single-tube calculator (since that is what it is).

    I hope you guys can put it to use for comparing things and evaluating what material to build your frames with.
    Last edited by RogueFab; 12-31-2012 at 11:19 AM.
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