Theory of Structures - Engineering

Q1:

Pick up the correct statement from the following:

A The bending stress in a section is zero at its neutral axis and maximum at the outer fibres

B The shear stress is zero at the outer fibres and maximum at the neutral axis

C The bending stress at the outer fibres, is known as principal stress

D The planes of principal stresses are inclined at 45° to the neutral plane

E All the above.

ANS:E - All the above.

Please explain opt 1 and 2.