selecting shaft diameter.
selecting shaft diameter.
(OP)
I have a steel shaft subjected to a maximum bending moment of M, and a torque of T. Its UTS is 430MPa, and its USS is 340. I need to find out the minimum diameter of this shaft.
Can anyone guide me through the process please?
Can anyone guide me through the process please?





RE: selecting shaft diameter.
outside allowable surface stress=(torque*radius)/polar moment of inertia
J=(Pi/2)*(Rad**4)
RE: selecting shaft diameter.
Think Mohr's circle.
Cheers
Greg Locock
RE: selecting shaft diameter.
I think you should have to calculate the diameter under two points of view: static and dinamic (fatigue).
Surely the fatigue criterium will be more restrictive but it could be too long to describe the method here and there are a lot of books that explain it very well.
The static criterium (von Misses) for circular shafts under flexion (M)and torque (T) is:
D^3=16/(Pi*USS)*SQR(4M^2+3T^2)
Bye!
RE: selecting shaft diameter.
RE: selecting shaft diameter.
RE: selecting shaft diameter.
BYE FRIEND.
RE: selecting shaft diameter.
RE: selecting shaft diameter.
HINT: pls. don't mention D.R. Moss (actually i recoomend not to rely much on coefficient tables in 2nd. ed. due to too many typing errors - e.g. compare tables 3-11, -12 to 5-9 & 5-10). . . thanks.