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Published in last 50 years
A general yield criterion and flow rule based on invariance principles is applied to the case of an ideal strain hardening solid having principal axes of anisotropy and a significant Bauschinger effect.
A general yield criterion for anisotropic materials is derived from the linear relationship between strain and stress components. The particular forms of the yield criterion for plane stress and for certain types of symmetry are discussed and are compared with available experimental data. The separate effects of the stress ratio and the direction of the stress axes on the yield stress are also determined.
T he flow of a plastic-rigid material forced through a rigid conical-shaped channel or die is considered. The method of solution is described for a general yield criterion. The particular yield conditions of von Mises and Tresca are considered in detail. Application of the theory is made to wire drawing.