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Torsion bar material
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Source：Internet Author：Unknow Pubdate：2010-02-27
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BrianGar (Automotive)
20 Nov 09 15:17
Am I right in saying that MT1010 is a common choice for manufacturing the above? This is a pretty general question of course I know, but the torsion bar is to be of the solid bar type and act as a supplement to the original rear torsion beam already in place.
Thanks.
Brian.
BrianGar (Automotive)
20 Nov 09 15:26
Sorry guys, I mean of the straight bar type but hollow tube. Approx 24mm is my maximum diameter I can cope with/room for, so I intend playing around with length and maybe diameters/solid/hollow in order to find my desired stiffness I require.
Tests will be done on the track with a variation of sizes but I need a material spec first in order to pick up some various lengths.
Thanks.
Brian.
TVP (Materials)
20 Nov 09 16:42
字串4
Torsion bars, whether they are solid or tubular, are usually highly stressed, so spring materials are normally used. MT1010 does not fit this description. Do you know what the stresses are in your design?
desertfox (Mechanical)
20 Nov 09 17:18
Hi Brian Gar
Have look at this site it gives spreadsheets of spring materials used by car manufacturers
http://www.landmark-autoparts.com/technical/sus01.htm
desertfox
BrianGar (Automotive)
20 Nov 09 17:26
TVP, I dont know the stresses on this one, shocking I know, but I intend copying an extremely similar design they used on the same beam but on a motorsport car. After 2 hrs of Googling I have found the bar was ''most probably'' made from 26mm en16, im unsure of wall thickness but I do know length and fixing methods and point locations. So I intend on making up a few from different wall thickness and trying them out. Does en16 sound right to you? My supplier has it, but isent keen on giving me advice, and I dont blame him as this has to be the vaguest post ever, but I need a materials starting point at least. 字串4
Thanks a lot for your reply's on this one.
Brian.
dgallup (Automotive)
20 Nov 09 17:27
I would think you want at least medium carbon like 1050 but probably higher up to 1095. 1074 seems to be popular, 1010 will just yield.
BrianGar (Automotive)
20 Nov 09 17:27
Thanks for the great link desertfox.
Brian.
desertfox (Mechanical)
20 Nov 09 17:28
Hi BrianGar
Your welcome
BrianGar (Automotive)
20 Nov 09 17:34
The more I read my own posts the more I feel its such an ask.
I know how different materials choice can vary enormously and perhaps I should do a bit of maths on this one. 字串6
I guess I was just hoping there was a ''General'' material choice I could go for which is mainly used in the above applications.
If I come across as being lazy I dont mean to be.
Thanks again to all.
Brian.
desertfox (Mechanical)
20 Nov 09 17:45
Hi Again
Another link
http://www.steelexpress.co.uk/engineeringsteel/EN16.html
this will give you its properties and composition.
Why not run some maths on your torsion bar
desertfox
BrianGar (Automotive)
23 Dec 09 8:52
@ Desertfox, thats exactly what Im going to do now, see what numbers I come up with, thanks for the links again,
Brian.
desertfox (Mechanical)
23 Dec 09 9:09
字串2
hi BrainGar
your welcome.
desertfox
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