Modeling of the strain-stress distribution during high stripe sinking (bilateral metal flow)

The problem of a normal contact stress definition and a form alteration during high stripe sinking with a bilateral metal flow is solved for modeling the process of combined pipe end upset using the slip line method. It is shown that the length of a transition zone of the pipe upset is defined by thickness of the pipe wall, matrix diameter and friction coefficient at the contact of the pipe end with the force plunger rib.