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Abstract min. measured at the extrusion ratio ranging from o 0 with five sets of semi-cone die angle of 15, 30, technique is derived for computing the composite flow presented. The compound method is based on the computing the extrusion flow stress for both aluminium and copper individually and applying the Holloway computing the mean composite extrusion flow stress. The second is based on the finite element method F.E.M. for computing the mean composite extrusion flow stress for the AI/eu duplex tubes directly. The two theoretical solutions are compared to that obtained experimentally according to , Holloway s formula. The resul ts show tha t the three A computer program ca lIed ELVEX is implemen ted for computing the nonlinear variations of both aluminium and. |