Viscoelastic plastic constitutive equation for flow of particle filled polymers
作者:
A. I. Isayev,
Xiyun Fan,
期刊:
Journal of Rheology
(AIP Available online 1990)
卷期:
Volume 34,
issue 1
页码: 35-54
ISSN:0148-6055
年代: 1990
DOI:10.1122/1.550113
出版商: The Society of Rheology
关键词: Particle filled polymer melts;Viscoelastic‐plastic model;Suspension rheology;Yield stress;Steady shear flow;Transient shear flow;POLYMERS;MELTS;STRUCTURE FUNCTIONS;DISPERSIONS;STRESSES;SHEAR FLOW;FLOW MODELS;VISCOPLASTICITY
数据来源: AIP
摘要:
A three‐dimensional viscoelastic‐plastic model for flow of particle filled polymer melts has been formulated. The approach is based upon a modification of the Leonov model by introducing a structure function describing stress generated by the presence of the dispersed phase under the assumption that the material obeys the von Mises yielding criterion before flow takes place. The model has been applied to steady simple shear and to transient shear flows, and equations have been derived for the components of stress tensor for each flow situation. A verification of the model has been made against limited experimental data available in the literature, indicating that the model is in fair agreement with experiments.
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