Kinematic and dynamic models of deformable solid body mechanics

In article invariant characteristics of the stress-strained state arising when performing various operations of metals processing by pressure are considered. Using a trigonometrical form of representation of stress and strain on the deviatoric plane the kinematic and dynamic models corresponding to the stress and strained states where trajectories of the main stresses and the main strains are represented by arches of circles that testifies to not monotony of forming processes are presented.