Affordable Access

Publisher Website

A micro/macro constitutive model for the small-deformation behavior of polyethylene

Authors
Journal
Polymer
0032-3861
Publisher
Elsevier
Publication Date
Volume
41
Issue
5
Identifiers
DOI: 10.1016/s0032-3861(99)00330-4
Keywords
  • Polyethylene
  • Micromechanics
  • Homogenization

Abstract

Abstract A micromechanically-based constitutive model for high density polyethylene (HDPE) in small deformations is presented. The microstructure of HDPE consists of closely packed crystalline lamellae separated by layers of amorphous polymer. Here a semi-crystalline polymer is modeled as an aggregate of randomly oriented composite inclusions, each consisting of a stack of parallel lamellae with their adjacent amorphous layers. For the amorphous phase, the viscoelastic constitutive behavior is modeled, assuming a polydomain liquid-crystal-like structure and micromechanical parameters such as the elastic constant of distortion and the persistent length of polymer molecules are used. The viscoplastic behavior at yield is incorporated through the constitutive modeling of the crystalline lamellae. Constitutive equations for the composite inclusions are proposed and different homogenization schemes for the overall properties discussed. The intermediate phase linking the lamellae and the amorphous layers is assumed to form a surface layer around each lamella and its role in the yield behavior of HDPE is discussed.

There are no comments yet on this publication. Be the first to share your thoughts.

Statistics

Seen <100 times
0 Comments

More articles like this

A constitutive model for modeling of the deformati...

on Computational Materials Scienc...

Micro-, meso- to macroscopic modeling of deformati...

on International Journal of Plast...

Constitutive modeling of hot deformation behavior...

on Materials Science and Engineer... Jan 01, 2011

Comparison of the macroscopic behavior of granular...

on Finite Elements in Analysis an... Jan 01, 2008
More articles like this..