shaft diameter

teng125

what formula should i use to calculate the shaft diameter according to the load due to bending and torsion??

Astronuc

That depends on the applied contraints and geometrical considerations.

Consider the formula one uses to determine the bending or torsional stresses or deflections in which the cross-sectional area is a factor. If the constraint is yield stress or maximum deflection, then one can solve for a particular cross-sectional area (and from that, diameter) based on a maximum stress less than or equal to yield stress, or maximum deflection based upon some limit (which could be limited by yield stress or interaction with some other structure).