Which of the following is the INCORRECT statement related to the theory and analysis of torsion?
1
A member is said to be under pure torsion when it is subjected to two equal and opposite torques.
2
If a moment is applied in a vertical plane containing the longitudinal axis of the beam, it will be subjected to torque, causing torque in the member.
3
Shear stress is maximum at the surface of a shaft and zero at its longitudinal axis.
4
It is assumed that the material of the shaft is Homogeneous and isotropic.