Question

Principal planes are those on which normal stress is

Answer 1

8.3 where plane ABC is a principal plane subjected to a principal stress σp and, by definition, zero shear stress. The normal stress is thus coincident with the resultant stress and both equal to σp.

Answer 2

Principal planes are those on which normal stress is either maximum or minimum.

• Principal planes are the stress planes which are subjected to a normal stress within a material.
• A type of stress known as normal stress acts perpendicular to a surface. A material's molecules are displaced in a direction perpendicular to the material's surface when it is subjected to normal stress.
• Principal planes are those inside a material that is either under the greatest normal stress, also known as the primary stress, or the least normal stress.
• The primary stress refers to the typical tension on these planes.
• The material's greatest and minimum tensile stress will be experienced on the material's primary planes, for instance, if it is subjected to a tensile load.

#SPJ6