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Rheometer

About: Rheometer is a research topic. Over the lifetime, 5759 publications have been published within this topic receiving 125849 citations.


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Journal ArticleDOI
TL;DR: In this article, the authors report an analysis of the dynamic behavior of a bed of glass beads made cohesive by silanisation and subjected to standard FT4 testing procedure, where a rotating blade is driven into a cylindrical bed, using a combination of experimental measurements and numerical simulations by the Distinct Element Method (DEM).

83 citations

Journal ArticleDOI
TL;DR: In this paper, a very high molecular weight, narrow molecular weight distribution polystyrene, having a molecular weight of 8.42×106, was investigated using a sliding plate rheometer.
Abstract: A very high molecular weight, narrow molecular weight distribution polystyrene, having a molecular weight of 8.42×106, was investigated using a sliding plate rheometer. The solvent was diethyl phthalate. The solution exhibited wall slip during steady shear, even at very low shear rates and exhibited a marked normal‐stress‐driven secondary flow at high shear rates. However, there was no evidence of slip during the oscillatory shear tests. Using fast Fourier transform analysis, the results of the oscillatory shear tests on this solution are presented in terms of response surfaces in a space based on a Pipkin diagram (strain‐rate amplitude versus frequency). These reveal the linear and nonlinear regimes and the approach to a purely elastic regime at high frequencies. Wagner’s constitutive equation predicts the major trends in the experimental data but does not provide quantitative predictions over the entire range of experimental parameters.

83 citations

Journal Article
TL;DR: Small amplitude oscillatory shear measurements afford the measurement of dynamic rheological functions, without altering the internal network structure of materials tested and are far more reliable than steady shear measurement.
Abstract: Bread is one of the most important foods consumed all over the world. This review focuses on the use of rheometer for the measurement of dough rheological properties and factors affecting them. Rheological properties of dough are very important in bread baking quality. Knowledge of the rheological behavior of bread dough is very important to understand mechanical properties of the dough and control finished products. Small amplitude oscillatory shear (SAOS) measurements afford the measurement of dynamic rheological functions, without altering the internal network structure of materials tested and are far more reliable than steady shear measurement. Viscoelasticity of dough is related to many factors such as nature of flour, dough ingredient, temperature, water uptake, air incorporation and type of mixing. There are many models to predicate dough rheology. In this work some of these models such as power low, linear Maxwell model, Lethersich's model, Peleg’s model and etc., were presented. The instruments such as farinograph, mixograph, Rheomixer, Extensigraph, Alveograph, Amylograph, Maturograph, Oven Rise Recorder, Fermentometer, Dynamic oscillatory, Concentric cylinders, Parallel plates, which are used for the measurement of dough rheological properties (due to viscoelastic behavior of dough) were also described. Key Word: Bread; Dough; Rheology; Flour; Rheology models

83 citations

Journal ArticleDOI
TL;DR: In this paper, the performances of bitumen and asphalt mixtures modified by crumb rubber (CR) were compared with those modified by styrene-butadiene-styrene (SBS).
Abstract: In this study, the performances of bitumen and asphalt mixtures modified by crumb rubber (CR) were compared with those modified by styrene-butadiene-styrene (SBS). The resultant mixtures were evaluated for their rheological and mechanical performances by different experimental techniques such as rheological bitumen tests, i.e., dynamic shear rheometer (DSR), bending beam rheometer (BBR), and hot mixture performance tests, that is, indirect tensile stiffness modulus, fatigue, semicircular bending, and toughness index. Experimental studies show that it is necessary to use twice as much CR as SBS to reach the same performance attained by SBS. CR modification at high additive content exhibits higher elastic response, i.e., recoverable strain, than the SBS-modified mixture. While the resistance to crack initiation of CR-modified mixtures increases with increasing additive content, the resistance to crack propagation decreases dramatically according to fatigue and semicircular bending tests.

83 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023240
2022487
2021164
2020196
2019201
2018162