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Steady plastic flow of a polymer during equal channel angular extrusion process: Experiments and numerical modeling
Author(s) -
Zaïri F.,
Aour B.,
Gloaguen J.M.,
NaïtAbdelaziz M.,
Lefebvre J.M.
Publication year - 2008
Publication title -
polymer engineering and science
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.503
H-Index - 111
eISSN - 1548-2634
pISSN - 0032-3888
DOI - 10.1002/pen.21042
Subject(s) - equal channel angular extrusion , materials science , extrusion , polypropylene , finite element method , composite material , plasticity , severe plastic deformation , deformation (meteorology) , microstructure , constitutive equation , void (composites) , flow (mathematics) , mechanics , structural engineering , engineering , physics
Equal channel angular extrusion (ECAE) is a powerful tool to modify microstructure via high plastic deformation without altering sample geometry. This article investigates the behavior of a polypropylene processed by ECAE. A finite element analysis in which the material constitutive law is coupled with damage by means of Gurson‐Tvergaard damage potential allowed to model experimental tests achieved on this material. Such a modeling allows the prediction of the extrusion load, strain and stress fields, and void volume fraction distribution. The need for the use of a back‐pressure is highlighted. POLYM. ENG. SCI., 2008. © 2008 Society of Plastics Engineers