What are the principal planes and principal stresses? Explain the Mohr’s Circle method for two perpendicular direct stresses with state of simple shear.

• A structural member may be subjected to different types of stresses (normal and shearing stresses) simultaneously. It is, therefore, necessary to find the region where the effect of these stresses will be critical from the design point of view.
• When such stresses act at a point in a stressed material, …