Characterisation of thixotropy revisited

被引：47

作者：

Cheng, DCH

机构：

[1] Letchworth, Herts SG6 4TT, Icknield Way

来源：

RHEOLOGICA ACTA | 2003年 / 42卷 / 04期

关键词：

thixotropy; Cheng-Evans phenomenological theory; model flow curves; Non-monotonic flow curves; rheometry; shear banding; Cross model; Sisko model; new class of thixotropic model;

D O I：

10.1007/s00397-002-0286-3

中图分类号：

O3 [力学];

学科分类号：

08 ; 0801 ;

摘要：

This paper re-examines the 'proof' of Cheng and Evans (1965) that the equilibrium flow curve of a thixotropic fluid has a positive slope, and shows that the slope can indeed be negative in parts. The implication of this on thixotropic behaviour in viscometers is described. Such thixotropic fluids can develop shear banding in wide-gap viscometers in common with many other materials, a brief survey of which is given. Additionally, the interrelationship of the Cross and Sisko fluids as models of thixotropy is examined, leading to the creation of a new class of thixotropic models.

引用

页码：372 / 382

页数：11

共 31 条

[1] Granular materials: constitutive equations and strain localization [J].