Experimental investigation of a variant of the theory of elastoplastic deformation of metals under complex loading

The article presents analytical approximations of two scalar functionals of the ternary relation of the theory of elastoplastic processes containing, in addition to the function of simple loading, four constants of plasticity of the material which are determined from experiments with bilinear strain paths with an orthogonal corner. It also presents the results of a comparison with the data of experiments with complex loading along variegated two- and three-dimensional strain paths that make it possible to assume the applicability of the suggested defining equations for describing processes of a single (with possible unloading) arbitrarily complex loading of initially isotropic strain-hardening materials.Translated from Problemy Prochnosti, No. 12, pp. 48–53, December, 1990.