Signorini problem in Hencky plasticity

G. Anzellotti—M. Giaquinta,On the existence of the field of stresses and displacements for an elasto-perfectly plastic body in static equilibrium, J. Math. Pures et Appl.,61 (1982), pp. 219–244. G. Anzellotti—M. Giaquinta,Existence of the displacement field for an elastoplastic body subject to Hencky's law and Von Mises yield condition, Manuscr. Math.,32 (1980), pp. 101–136. C. Baiocchi—G. Buttazzo—F. Gastaldi—F. Tomarelli,General Existence Theorems for Unilateral Problems in Continuum Mechanics, Arch. Rat. Mech. Anal.,100, 2 (1988), pp. 149–180. G. Fichera,Boundary value problems in elasticity with unilateral constraints, Handbuch der Physik,VI/2, Springer-Verlag, Berlin, Heidelberg, New York (1972), pp. 347–389. R. Kohn,New Estimates for Deformations in Term of their Strains, Ph. D. Thesis, Princeton University (1979). J. L. Lions—E. Magenes,Problemi ai limiti non omogenei, Ann. Scuola Norm. Sup. Pisa Cl. Sci. III,16 (1962), pp. 1–44. H. Matthies—G. Strang—E. Christiansen,The saddle point of a differential program, inEnergy Methods in Finite Element Analysis, ed. R. Glowinski, E. Rodin and O. C. Zienkiewicz, John Wiley, New York (1979). B. D. Reddy—F. Tomarelli,The obstacle problem for an elastoplastic body, Appl. Math. Optim.,21 (1990), pp. 89–110. R. Temam,Problèmes mathematiques en plasticité, Gauthier-Villars, Paris (1983). R. Teman—G. Strang,Functions of bounded deformation, Arch. Rat. Mech. Anal.,75 (1980), pp. 7–21.