Öcal,M.Tekkaya, Ahmet EemanEgemen,M.Tekkaya,A.E.Manufacturing Engineering2024-10-062024-10-06200512193-567X[SCOPUS-DOI-BELIRLENECEK-406]2-s2.0-32544445237https://hdl.handle.net/20.500.14411/9194Two commonly used analytical force computation methods for cold forward rod extrusion are evaluated by means of precise finite element computations. The upper-bound model by Avitzur based on the spherical velocity field and the model by Siebel based on a quasi-upper-bound solution are considered. It has been found that the pure deformation forces obtained by summing the ideal force and shear force terms deviate between +25% and -20% from the finite element solutions. Larger deviations, however, occur for the Coulomb-friction term in the container. A new model based on an elasto-static analysis combined with numerical analysis is suggested to compute this term. This new model supplies also the accurate pressure distribution within the container.eninfo:eu-repo/semantics/closedAccessAnalytical Force PredictionCold ForgingFinite Element MethodForward Rod ExtrusionMechanical EngineeringMetal FormingArticleQ2Q1301 C83102