When a shaft of diameter D is subjected to a twisting moment T and a bending moment M, then the maximum normal stress is given by

Question

Question

This question was previously asked in

WBPSC JE Mechanical 2018 Official Paper

Answer 1

Explanation:

When shaft subjected to pure bending develops normal stress which is given by:

When shaft subjected to pure twisting moment develops shear stress which is given by:

The combined effect of bending and torsion produces principal stress which is given by:

from the above:

σ_Max =