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Titolo:
The modelling of large deformations of pre-oriented polyethylene
Autore:
Sweeney, J; Caton-Rose, P; Coates, PD;
Indirizzi:
Univ Bradford, IRC Polymer Sci & Technol, Dept Mech & MEd Engn, Bradford BD7 1DP, W Yorkshire, England Univ Bradford Bradford W Yorkshire England BD7 1DP , W Yorkshire, England
Titolo Testata:
POLYMER
fascicolo: 3, volume: 43, anno: 2002,
pagine: 899 - 907
SICI:
0032-3861(200202)43:3<899:TMOLDO>2.0.ZU;2-A
Fonte:
ISI
Lingua:
ENG
Soggetto:
BEHAVIOR; POLYMERS;
Keywords:
molecular orientation; constitutive equation; finite element;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
9
Recensione:
Indirizzi per estratti:
Indirizzo: Sweeney, J Univ Bradford, IRC Polymer Sci & Technol, Dept Mech & MEd Engn,Bradford BD7 1DP, W Yorkshire, England Univ Bradford Bradford W YorkshireEngland BD7 1DP re, England
Citazione:
J. Sweeney et al., "The modelling of large deformations of pre-oriented polyethylene", POLYMER, 43(3), 2002, pp. 899-907

Abstract

High temperature reversion tests have revealed a state of pre-existing molecular orientation in extruded polyethylene sheet. This state is related todifferences in stress-deformation behaviour when specimens of the sheet are stretched along different angles with respect to the extrusion direction. An established large deformation, rate-dependent constitutive equation hasbeen developed to model this material, by incorporating the pre-orientation by the addition of a strained Gaussian network. The level of pre-orientation is deduced from the dimensional changes on shrinkage. The constitutive equation is incorporated into the finite element package ABAQUS, and the shapes and drawing forces of tensile specimens extended at various angles to the extrusion direction are modelled. (C) 2001 Elsevier Science Ltd. All rights reserved.

ASDD Area Sistemi Dipartimentali e Documentali, Università di Bologna, Catalogo delle riviste ed altri periodici
Documento generato il 27/11/20 alle ore 13:09:33