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In this paper, a generalized upper bound solution is developed for extrusion of bi-metallic rectangular cross-section bars through dies of any shape. The internal, shearing and frictional power terms… Continue Reading
In this paper, the process of plane strain backward extrusion process through arbitrarily curved punches, by means of the upper bound method and the finite element method is investigated. A… Continue Reading
In this paper, the upper bound method has been used to analyze of flat rolling process and prediction of internal defects for rigid plastic materials. The inlet and outlet shear boundaries of the… Continue Reading
The subject of this paper is analysis of the flat rolling process by upper bound method. In this analysis the arc of contact has been replaced by a chord and the inlet and outlet shear boundaries of… Continue Reading
In this paper, the upper bound method has been used in analysis of the flat rolling process and prediction of internal defects for a strain-hardening material. The arc of contact has been replaced… Continue Reading