Strut bar fabrication gone wrong, Need advice |
Strut bar fabrication gone wrong, Need advice |
Nov 22, 2012 - 12:36 AM |
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Enthusiast Joined Sep 30, '11 From Sydney Currently Offline Reputation: 0 (0%) |
So made a strut bar today all fits perfectly, is beefy as all hell but then I decide to try and shut the bonnet.....
When I was measuring it, I didnt notice the support bars running along the underside of the bonnet and of course with my luck they hit the strut bar preventing me from closing the bonnet So now I need some ideas from you guys on how to modify the strut bar without starting again. My favourite idea is cutting the bar in the middle and bashing the bends at either end down a little but and then re-welding it in the middle. My concern is strength when it is re-welded. OR I can grind off the welds at each end and make the bends a slightly lesser angle. Prefer not to do this one but if its the best option I guess I have no choice. If theres any other ideas you guys/gals can think of let me know or please critique mine just above. It is going to become a 3-pt bar just trying to sort two out first. Here are the pics: |
Nov 23, 2012 - 8:12 PM |
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Enthusiast Joined Sep 30, '11 From Sydney Currently Offline Reputation: 0 (0%) |
Ok guys, since i'm studying mechanical engineering at uni i have access to simulation software and did a quick comparison between flatbar, square tube and circular tube for a 2 point bar.
Here are the results and are as expected really, but i'm still not gonna change my design. The tests were run using a force of 5000N at each end of the bar putting it in compression. No idea what they are actually experiencing. This test is also a big simplification assuming that the bar is free to slide in the axis that it sits (parallel to the engine). So this wont actually be the deflections happening under your bonnet, just showing people the difference in the cross sections. The dimensions are: Flatbar - 32x8mm Round tube - Outside diameter 20mm, inside diameter 18mm Square tube - 20x20x2mm |
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