 Strut bar fabrication gone wrong, Need advice |
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 Nov 23, 2012 - 11:24 PM
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Enthusiast  Joined Sep 30, '11 From Sydney Currently Offline Reputation: 0 (0%)  |
QUOTE (enderswift @ Nov 23, 2012 - 11:06 PM)  Have you used Abaqus before? Is that the simulation environment inside Solidworks? if so only once, I mainly use ANSYS QUOTE (97lestyousay @ Nov 23, 2012 - 11:34 PM) interesting, i would run it again with a straight bar, I think the bend would cause more deflection than a shorter straight bar. Just a guess, I have no software to test this, but I have been making parts on cnc mills for 20 years, so understanding rigidity is something I have tried a time or 2. afaik the bend seen in some bars is a clearance thing for top mount IC, I doubt it is adding any rigidity. Bicycle frames and forks are a good example of rigidity in action, the materials used have a lot to do with it also. Chrome moly should be a great strut bar material imo. A straight bar will withstand ALOT more force than a bent bar of any sort. This is due to a buckling situation that we encounter as both sides are in compression and fixed. Doing the calculation for the flat bar I used I found that it will take a compression force of 8909.29 N at each end to cause the bar to begin to bend. The other reason that a bend is necessary is due to things getting in the way like, air intake piping, bonnet supports, throttle cable. So really it becomes impractical unfortunately. QUOTE (njccmd2002 @ Nov 23, 2012 - 11:57 PM) flat should be fine...  i would add the little triangles at the end of mine If that's the J-speed one, that's what modeled mine off, I just couldn't be bothered to make the triangles haha If my thesis supervisor is feeling nice after Christmas i might even try to persuade him to let me hook some strain gauges up to it and then we can get a pretty good idea of what kind of forces are being put on the bar. |
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Nov 23, 2012 - 11:36 PM
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 Enthusiast Joined Mar 15, '07 From Tennessee Currently Offline Reputation: 52 (100%) |
J speed it is!!
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Nov 24, 2012 - 8:13 AM
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 Enthusiast Joined Jul 7, '03 Currently Offline Reputation: 55 (100%) |
QUOTE (UVZ164 @ Nov 22, 2012 - 3:53 PM) A straight bar can't work as it hits a few things along the way and the bends also provide some extra rigidity regardless it is going to be much beefier than stock -------------------- JDM guy made me do it.
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Nov 24, 2012 - 4:18 PM
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Enthusiast Joined Mar 3, '05 From Richmond, B.C. Currently Offline Reputation: 0 (0%) |
QUOTE (UVZ164 @ Nov 23, 2012 - 9:24 PM) If my thesis supervisor is feeling nice after Christmas i might even try to persuade him to let me hook some strain gauges up to it and then we can get a pretty good idea of what kind of forces are being put on the bar. Make sure to throw the stock one on there for a test, see just how flexible its tubular design is in comparison to something made out of flat metal stock. |
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