Abstract: The use of “dual-stream functions” in analyzing some three-dimensional metal-forming processes is demonstrated in this paper. The problems discussed are open-die forging of blocks, rolling of a ...

Abstract: Plane-strain extrusion of a nonworkhardening material through a die with arbitrarily defined profile is analyzed using extremum principles. General kinematically admissible flow models for the ...

Abstract: An approach for selecting general kinematically admissible velocity fields for an incompressible material from assumed shape of streamlines is outlined. Velocity field and generalized boundaries ...

Abstract: An investigation was made of the effect of cleaning the contacting surfaces of copper samples upon the strength of the diffusion bond formed. The cleaning of surfaces by filing and the diffusion ...

Abstract: A general kinematically admissible velocity field applicable to forging of a rectangular strip of a incompressible material is presented. Generalized shape of any dead zone, if assumed, can be ...

Abstract: In this study, the interdependence between temperatures and metal flow during upset forging of rings has been investigated. An improved upper-bound analysis has been developed to predict metal ...

Abstract: This paper describes the application of computer-aided techniques to the lubricated extrusion of shapes such as L ’s and T ’s. A simple analysis of the lubricated direct-extrusion process is ...