Steel Tubing Beam Torsion Calculation
Steel Tubing Beam Torsion Calculation
(OP)
How do you calculate the torsion stress in an open ended steel tube that has a torsional load applied? The tubing is 10mm wall x 125mm tall x 100mm wide and the 2500 lb load is applied perpendicular to the tube via a 1495mm long arm.





RE: Steel Tubing Beam Torsion Calculation
ok, you can fudge 'round with the "3" factor if your section isn't really "thin" ...
RE: Steel Tubing Beam Torsion Calculation
Just for clarification for the maximum stress formula:
T = torque applied
b = perimeter of section
t = ?
Do you "fudge" the "3" factor up or down as the wall thickens?
I appreciate your help.
RE: Steel Tubing Beam Torsion Calculation
Greenengr1, could you fill the tube with water if it had caps on the ends?
RE: Steel Tubing Beam Torsion Calculation
RE: Steel Tubing Beam Torsion Calculation
RE: Steel Tubing Beam Torsion Calculation
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RE: Steel Tubing Beam Torsion Calculation
Cheers
Greg Locock
SIG:Please see FAQ731-376: Eng-Tips.com Forum Policies for tips on how to make the best use of Eng-Tips.
RE: Steel Tubing Beam Torsion Calculation
For a closed shape such as a tube, the torsional shear stress is given by:
Tau = Mt/(2*A*t)
where tau is the shear stress
Mt is the torsional moment
A is the area enclosed by the centerline of the ring section of the tube
t is the thickness of the tube
The angle of twist per unit of length is:
theta = Mt*s/(4A^2*G*t)
where s = length of centerline of ring section of tube
G is shear modulus
Best regards,
BA
RE: Steel Tubing Beam Torsion Calculation
Steve