Results 301 to 310 of about 519,855 (319)

Analysis of shear rheometry of yield stress materials and apparent yield stress materials

Rheologica Acta, 2002
For the most common types of viscometers the apparent flow curve of plastic fluids is studied. For torsional flow, where the shear rate is the natural variable, the apparent yield stress exceeds the true yield stress $$\tau _c $$ by more than 33%.
Hesham Asoud, Peter O. Brunn
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Yield stress of magnetic suspensions

Colloid Journal, 2012
The theories available for the yield stress of magnetic suspensions imply that their transition from a quasi-elastic to a fluid behavior is related to the disruption of chainlike or bulk columnlike aggregates connecting opposite boundaries of a region containing a suspension.
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Advances in yield stress measurements for chocolate

2017
Chocolate (a cocoa dispersion), can be defined as a concentrated suspension made up of solid particles, such as sugar, cocoa powder, milk powder, etc., dispersed in a Newtonian liquid, generally cocoa butter. The rheological properties of this matrix are largely influenced by type and quantity of ingredients and processing techniques.
V. Glicerina, S. Romani
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Relation Between Yield Stress and Peierls Stress

physica status solidi (b), 2019
It is often assumed that the Peierls stress of single dislocations can reflect accurately the macroscopic yield stress. Here, dislocation dynamics simulations show that the yield stress‐to‐Peierls stress (Y/P) ratio remains within a small range of ≈0.3 ± 0.1, over a wide range of initial dislocation density, mobile dislocation fraction, and temperature
KW Siu, Alfonso H.W. Ngan
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Yield Stress Measurements

1990
Much has been written about the yield stress, specially in the field of blood rheology. The definition of the yield stress is very clear and says that this is the smallest load under which a substance will flow. Its measure is the yield stress value of the applied shear stress.
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The yield stress of fibre suspensions

The Canadian Journal of Chemical Engineering, 1990
AbstractYield stresses were determined for commercial wood pulp suspensions and synthetic fibre suspensions of low and medium mass concentration. The yield stresses measured represent interfibre failure of the network rather than failure between the suspension and a solid surface.
Richard J. Kerekes, Chad P. J. Bennington, John R. Grace   +2 more
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Yield stress measurements with the vane

Journal of Non-Newtonian Fluid Mechanics, 1996
Abstract Yield stress measurements were performed on a TiO 2 pigment suspension with the vane in both a rate controlled and a stress controlled mode. In the rate controlled mode, a constant rotational speed is applied to the vane immersed in the suspension, and the resulting stress is measured as a function of time.
Petra V. Liddel, David V. Boger
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YIELD STRESS OF FRACTAL AGGREGATES

Fractals, 2015
A model for the yield stress of aggregates is presented that incorporates fractal dimension taking into account the solid volume fraction and the aggregate diameter. The model shows the yield stress (σy) of aggregates increases with the solid volume fraction (ϕs) as a power law, and is given by [Formula: see text], where the exponent (m) is related to ...
Yongfu Xu, Chuanxin Liu, Yue Xi, Feifei Chu, Jin-Jian Chen   +4 more
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Yield-stress and stress relaxation measurements in cobalt

Journal of Applied Physics, 1984
Yield stress of polycrystalline cobalt (5N) was studied in the temperature range 15–300 K and interpreted by a theoretical model which provided an agreement with experimental results. Logarithmic stress relaxation was also studied in polycrystalline cobalt at natural strains of up to 8% at 15, 25, 40, and 55 K.
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Yield Stress of Nanocrystalline Materials

2004
Most mechanical properties of nanocrystalline materials (NCMs) are essentially different from those of conventional coarse-grained polycrystals. NCMs exhibit extremely high strength and good fatigue resistance [224–226], as desired for numerous applications. Most NCMs show low tensile ductility which limits their practical utility.
Mikhail Yu. Gutkin, Ilya A. Ovid'ko
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