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An UBET (upper bound element technique) analysis is carried out to analyze a non-axisymmetric extrusion/forging process. A new KAVF (kinematically admissible velocity field) is proposed to determine the forming load and the average extruded length in the extrusion/forging process of polygonal-and trochoidal-headed bars from solid cylindrical billets. Both cylindrical and Cartesian coordinates are...
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