Octahedral stresses
Definition of the octahedral planes and of the normal and shear stresses acting on them.
Tagged: invariants
Deviatoric stress and invariants
Definition of the hydrostatic and deviatoric parts of the stress tensor and calculation of the invariants of the deviatoric stress tensor.
Principal stresses and stress invariants
Derivation of the principal stresses and the stress invariants from the Cauchy stress tensor.