Hollow torsion bar equivalent as solid bar.
Hollow torsion bar equivalent as solid bar.
(OP)
Cheers all,
I am currently using a hollow torsion bar (splined on both ends) with an OD of 1.125" and an ID of .875". What dia. solid bar would give me equivalent performance.
I know this formula is in Shigley somewhere, but I cannot find it.
Thanks in advance,
Jason Miyamoto
I am currently using a hollow torsion bar (splined on both ends) with an OD of 1.125" and an ID of .875". What dia. solid bar would give me equivalent performance.
I know this formula is in Shigley somewhere, but I cannot find it.
Thanks in advance,
Jason Miyamoto





RE: Hollow torsion bar equivalent as solid bar.
J=1/2*Pie*c**4
Equating the solid J (Js) to hollow J (Jh)
Js=Jh
1/2*Pie*Rs**4=1/2*Pie*(Rhouter**4 - Rhinner**4)
Rs=1.004 inch
RE: Hollow torsion bar equivalent as solid bar.
The fact that going to a solid bar will require an increase in dia. was not what I was expecting.
Thanks
RE: Hollow torsion bar equivalent as solid bar.
RE: Hollow torsion bar equivalent as solid bar.
What kind of Pie? I suppose you were meaning π or pi, right?
Best regards,
Matthew Ian Loew
"I don't grow up. In me is the small child of my early days" -- M.C. Escher
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.
RE: Hollow torsion bar equivalent as solid bar.
RE: Hollow torsion bar equivalent as solid bar.
Click on the Process TGML link and scroll down to the Special Characters section.
Best regards,
Matthew Ian Loew
"I don't grow up. In me is the small child of my early days" -- M.C. Escher
Please see FAQ731-376 for tips on how to make the best use of Eng-Tips Fora.