UNIT – IV
PRINCIPAL STRESSES AND STRAINS :
INTRODUCTION – STRESSES ON AN INCLINED
SECTION OF A BAR UNDER AXIAL LOADING –
COMPOUND STRESSES – NORMAL AND
TANGENTIAL STRESSES ON AN INCLINED PLANE
FOR BIAXIAL STRESSES – TWO PERPENDICULAR
NORMAL STRESSES ACCOMPANIED BY A STATE
OF SIMPLE SHEAR – MOHR’S CIRCLE OF
STRESSES – PRINCIPAL STRESSES AND STRAINS
– ANALYTICAL AND GRAPHICAL SOLUTIONS.
THEORIES OF FAILURE: INTRODUCTION – VARIOUS
THEORIES OF FAILURE – MAXIMUM
PRINCIPAL STRESS THEORY, MAXIMUM
PRINCIPAL STRAIN THEORY, STRAIN ENERGY
AND SHEAR STRAIN ENERGY THEORY (VON MISES
THEORY)