Theoretical solution of contact stresses in upsetting of cylinder by spherical concave dies

Abstract

Determination of stress-strain state in the technology of plasticity is essential as the knowledge of this state enables the determination of basic process parameters such as: deformation force, mean pressure and work of deformation. Furthermore, it makes possible to analyze the potential of material formability. In this paper theoretical analysis of contact stresses in upsetting of cylinder by spherical concave dies has been presented.