Abstract:

The plasticity mechanics problems of St.Venant-Levy-Mises materials be bring into the theoretical system of Lagrangian mechanics,the basic differential equations of plasticity mechanics about above materials on three-dimensional problem,on small deflection problems ,and on finite-deformation (large deflection) problem be discussed in this paper.

Key words: Lagrange formalism, St.Venant-Levy-Mises materials, Plasticity mechanics.