Question

Among maximum shear stress theory and distortion energy theory, which gives the higher value shear yield strength?

(a) Maximum shear stress theory

(b) Distortion energy theory

(c) Both give equal values

(d) Vary from material to material

This question was asked to me in my university exam.

This question belongs to the Couplings concept in Shafts, Keys and Couplings of Machine Design

Answer 1

The correct option is (b) Distortion energy theory

Let me elaborate: Maximum shear stress theory gives S(sy)=0.5S(yt) while Distortion energy theorem gives S(sy)=0.577(Syt).