Strength of Materials

SALIENT POINTS

• Shear stresses acting on planes at right angles are equal and are called complementary shear stresses.
• State of a plane stress is defined as that condition in which there is no stress component acting on a pair of parallel faces.
• State of a plane strain is defined as that condition in which there is no strain component acting in a particular direction or ignoring the stress in that direction.
• Principal stress may be defined as a normal stress acting on a plane wherein there are no shear stresses. These principal stresses are named as major principal stress, σ₁, minor principal stress, σ₂ and intermediate principal stress, σ₃.
• Planes on which the principal stresses take place are called principal planes wherein there is no influence ...