Question

Consider the following statements :

I. On a principal plane, only normal stress acts.
II. On a principal plane, both normal and shear stresses act.
III. On a principal plane, only shear stress acts.
IV. Isotropic state of stress is independent of frame of reference.

The TRUE statements are

• A. I and IV
• B. II
• C. II and IV
• D. II and III

Answer 1

The correct option is A I and IV

Principal plane is the plane on which only normal stress acts and shear stress is zero and isotropic state of stress is independent of the frame of reference.