期刊
RHEOLOGICA ACTA
卷 56, 期 3, 页码 189-194出版社
SPRINGER
DOI: 10.1007/s00397-017-0998-z
关键词
Rheology experiments; Yield stress; Viscoelasticity; Flow curves; Kelvin-Voigt; Maxwell fluid
类别
It is now 30 years since Barnes and Walters published a provocative paper in which they asserted that the yield stress is an experimental artifact. We now know that the situation is far more complicated than understood at the time, and that the mechanics of the solid material prior to yielding must be considered carefully. In this paper, we examine the response of a well-studied simple yield-stress material, namely a Carbopol gel that exhibits no thixotropy, and demonstrate the significance of the pre-yielding behavior through a number of elementary measurements.
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