- #1
Iclaudius
- 36
- 0
Hiya friends,
so i have a little problem,
A shaft is made from tube 25 mm outer diameter and 20 mm inner diameter. The shear stress must not exceed 150 Mpa. Calculate the maximum torque that should be placed on it
ok so we have T/J = tau/r
so T = (tau/r)*J - this should give me my answer right I'm using tau = 150Mpa, r= 20mm, and J = (pi/32)(25^(4)-20^(4)), this however does not give me the answer which is 271.69 Nm
ps i have tried using both 25 and 20 respectively for the r value without any sucess, any help advice is appreciated, thanks in advance
Claudius
so i have a little problem,
A shaft is made from tube 25 mm outer diameter and 20 mm inner diameter. The shear stress must not exceed 150 Mpa. Calculate the maximum torque that should be placed on it
ok so we have T/J = tau/r
so T = (tau/r)*J - this should give me my answer right I'm using tau = 150Mpa, r= 20mm, and J = (pi/32)(25^(4)-20^(4)), this however does not give me the answer which is 271.69 Nm
ps i have tried using both 25 and 20 respectively for the r value without any sucess, any help advice is appreciated, thanks in advance
Claudius