Question

Pick the incorrect statement from the following four statements

• A. On the plane which carries maximum normal stress, the shear stress is zero.
• B. Principal planes are mutually othogonal
• C. On the plane which carries maximum shear stress, the normal stress is zero.
• D. The principal stress axes and principal strain axes coincide for an isotropic material

Answer 1

The correct option is C On the plane which carries maximum shear stress, the normal stress is zero.

Maximum shear stress plane has normal stress equal to $\frac{{\sigma }_1+{\sigma }_2}{2}$