Results 1 to 10 of about 1,588,858 (159)
Rheopexy and tunable yield stress of carbon black suspensions [PDF]
arXiv, 2012 We show that besides simple or thixotropic yield stress fluids there exists a third class of yield stress fluids. This is illustrated through the rheological behavior of a carbon black suspension, which is shown to exhibit a viscosity bifurcation effect around a critical stress along with rheopectic trends, i.e., after a preshear at a given stress the ...
Bertrand, François +3 more
arxiv +7 more sources
A study of the static yield stress in a binary Lennard-Jones glass [PDF]
, 2003 The stress-strain relations and the yield behavior of model glass (a 80:20 binary Lennard-Jones mixture) is studied by means of MD simulations. First, a thorough analysis of the static yield stress is presented via simulations under imposed stress. Furthermore, using steady shear simulations, the effect of physical aging, shear rate and temperature on ...
Berthier L. +17 more
arxiv +5 more sources
Modeling the Flow of Yield-Stress Fluids in Porous Media [PDF]
, 2009 Yield-stress is a problematic and controversial non-Newtonian flow phenomenon. In this article, we investigate the flow of yield-stress substances through porous media within the framework of pore-scale network modeling. We also investigate the validity of the Minimum Threshold Path (MTP) algorithms to predict the pressure yield point of a network ...
Sochi, Taha
arxiv +3 more sources
Yield stress and shear-banding in granular suspensions [PDF]
, 2009 We study the emergence of a yield stress in dense suspensions of non-Brownian particles, by combining local velocity and concentration measurements using Magnetic Resonance Imaging with macroscopic rheometric experiments. We show that the competition between gravity and viscous stresses is at the origin of the development of a yield stress in these ...
Abdoulaye Fall +6 more
arxiv +5 more sources
The Yield Condition in the Mobilization of Yield-Stress Materials in Distensible Tubes [PDF]
, 2013 In this paper we investigate the yield condition in the mobilization of yield-stress materials in distensible tubes. We discuss the two possibilities for modeling the yield-stress materials prior to yield: solid-like materials and highly-viscous fluids and identify the logical consequences of these two approaches on the yield condition. As part of this
Sochi, Taha
arxiv +4 more sources
Rheological characteristics of steel in continuous roll casting-rolling
Mechanics and Advanced Technologies, 2021 Problems. In the process of obtaining a strip in a casting and rolling device, the question arises of combining the process of hot rolling of the solidified material and the process of crystallization of the liquid melt.
Ольга Холявік +4 more
doaj +1 more source
The “two-step” yielding process of the natural mud under steady and oscillatory shear stress
Frontiers in Earth Science, 2022 The rheological properties of natural mud are closely related to nautical depth estimation, wave propagation, and morphology evolution of muddy coast. In this study, the rheological properties of the natural mud collected from Luxi Island and Zhoushan ...
Shaohua Wang +3 more
doaj +1 more source
Demonstration of a Facile and Efficient Strategy for Yield Stress Determination in Large Amplitude Oscillatory Shear: Algebraic Stress Bifurcation [PDF]
Phys. Fluids 35:123107 (2023), 2023 The large amplitude oscillatory shear (LAOS) has been extensively studied for understanding the rheological responses of yield stress fluids. However, the employed methodology for determining the yield stress remains uncertain albeit the fact that many classical or plausible methods exist in the literature.
arxiv +1 more source
Test of Uniaxial Tensile Mechanical Properties of ECTFE Foils at Various Temperatures
Shanghai Jiaotong Daxue xuebao, 2021 Uniaxial tensile tests of ethylene-chloro-tri-fluoro-ethylene (ECTFE) foils were conducted at a thickness of 250 μm and various low and high temperatures (-50, -40, -30, -20, -10, 0, 10, 20, 30, 40, 50, 60, 70, and 80 ℃).
LIU Changjiang, ZHAO Bing, CHEN Wujun
doaj +1 more source
On the Nature of Flow Curve and Categorization of Thixotropic Yield Stress Materials [PDF]
, 2022 Thixotropy is a phenomenon related to time dependent change in viscosity in presence or absence of flow. The yield stress, on the other hand, represents the minimum value of stress above which steady flow can be sustained. In addition, the yield stress of a material may also change as a function of time. Both these characteristic features in a material
arxiv +1 more source