Analysis Of Hdpe Behavior During Two Equal Channels Angular Pressing Using 120° Die

In this work, an analysis of the high density polyethylene behavior during two turn Equal Channel Angular Extrusion (2-ECAE) has been investigated by finite element using 90° and 120° dies. To this end, the material parameters of an elasto-viscoplastic phenomenological model were derived from compressive tests at different temperatures and strain rates. A good agreement was found between the identified model and experimental results. Then, the effects of the channel angles, the length and thickness of the intermediate channel, the fiction and the temperature on the equivalent plastic strain and the pressing force have been analyzed. Recommendations on process conditions were proclaimed at the end of this work.