shear stress

huangyhg

shear stress
hello
as a electrical and control systems engineer im'e having dificulty with a drive shaft.  what is the permissable stress allowed if the material used is 275 structual steel.
allowable shear stress for steel is given in the aisc manual for steel design. the permissable shear stress will depend on your design method, either lrfd, or asd.
be sure to add the torsional shear stress to any other horizonal or vertical shear forces applied to the shaft.
if it's a drive shaft, that puts it more in the me realm rather than the structural.  if i'm not mistaken, you'd need to take fatique into account also.
eleccola:  what kind of problems are you having?
regards
dave (mechanical engr)
the problem is im'e trying to drive a 5kw lifting motor through a piece of structual steel (i.e scaffold bar)and want to far overspec the bar for saftey factor's.