ANALYTICAL AND EXPERIMENTAL-STUDY OF THE DIE DRAWING OF CIRCULAR RODSTHROUGH CONICAL DIES

Citation
Fa. Motashar et al., ANALYTICAL AND EXPERIMENTAL-STUDY OF THE DIE DRAWING OF CIRCULAR RODSTHROUGH CONICAL DIES, Polymer engineering and science, 33(19), 1993, pp. 1288-1298
Citations number
23
Categorie Soggetti
Polymer Sciences",Engineering
ISSN journal
00323888
Volume
33
Issue
19
Year of publication
1993
Pages
1288 - 1298
Database
ISI
SICI code
0032-3888(1993)33:19<1288:AAEOTD>2.0.ZU;2-L
Abstract
An analysis is presented of the process of die drawing isotropic polym ers, in the form of circular rods, to produce highly oriented material s with enhanced mechanical properties. The stresses in a small element of material undergoing the drawing process have been analyzed using a force-equilibrium approach and the initial yield and flow stresses in the material have been predicted from the von-Mises yield criterion. The stress-strain-strain rate characteristics of the polymer used in t he analysis were deduced from uniaxial tensile test data obtained at t he same temperature at which the die drawing occurred. Experimental re sults are presented of the stress in polypropylene GSE-108 rods when d ie drawn at 90-degrees-C in a purpose-built die drawing facility. Nove l techniques were used to determine the stress and strain distribution s along the die. A comparison of the experimental results and the anal ytical predictions shows good agreement.