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Journal articles on the topic 'Rheological'

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Author: Grafiati

Published: 4 June 2021

Last updated: 18 May 2024

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1

Myslyuk, M. A., Yu D. Voloshyn, and N. R. Zholob. "Assesment of rheological properties of drilling fluids based on rotational viscometry data." SOCAR Proceedings, SI2 (December 30, 2023): 41–53. http://dx.doi.org/10.5510/ogp2023si200879.

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The model of interpretation of rotational viscometry data is described using a strict solution of the Couette flow equation and considering the information resulting from the experiments. Using the example of common rheological models of drilling muds, the influence of the radii ratio and rheological properties on the accuracy of their estimation was studied using the dependence of the Newtonian fluid shear rate gradient. Comparative results of the rheological properties assessment for drilling muds in industrial conditions are given. Keywords: bi-viscous fluid; Couette flow; maximum likelihood principle; rheologically stationary models.

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2

Myslyuk, M. A. "Determination of the rheological properties of drilling fluids from rotational viscometry data." JOURNAL OF HYDROCARBON POWER ENGINEERING 7, no. 2 (December 30, 2020): 31–45. http://dx.doi.org/10.31471/2311-1399-2020-2(14)-31-45.

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The method of rotational viscometry data processing, which is based on the maximum likelihood function principle is considered. The method takes into account the informative content of experiments and is built on the strict solution of the Couette flow equation in a viscosimeter gap. The class of models is formed from rheologically stationary (including viscosity) models. A generalization of the model for processing the experimental plan data with the aim of building equations of the state of the rheological properties of variable factors is considered. A multicriterial interpretation of estimates of the rheological model and properties of liquids has been proposed. Illustrative examples of estimating rheological properties building of drilling fluids and their equations of state are given.

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3

Barsukov, V. G., and T. S. Chikova. "Comparative analysis of rheological properties indicators for thermoplastic melts." Vesnik of Yanka Kupala State University of Grodno. Series 6. Engineering Science 12, no. 1 (September 9, 2022): 65–73. http://dx.doi.org/10.52275/2223-5396-2022-12-1-65-73.

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The introduction analyzes the state of the issue and substantiates the research relevance. The aim of the work is to determine and comparatively analyze the values of physically normalized indicators of rheological properties of typical representatives of thermoplastic melts. In the methodological part of the work, to ensure the comparability of the results, the physically normalized form of the Ostwald-de-Waele power empirical rheological equation proposed by McKelvey is used. The calculation scheme is based on the transition from an approximating power function with rheologically non-deterministic parameters to two dimensionless rheologically determined complexes characterizing the stress-strain state of a nonlinear-viscous medium. The first dimensionless complex is presented in the form as the ratio of the actual shear rate to a unit normalization base value, and the second is in the form as the ratio of shear stresses acting on the deformable medium to the base (reduced) value of these stresses, which are necessary to overcome viscous resistance at a unit normalization shear rate. A technique is described for determining physically normalized indicators of rheological properties using the thermoplastic melts flow curves available in the scientific and technical literature (dependence of shear stresses on shear rate) based on the processing of these graphical dependencies plotted in double logarithmic coordinates. In the main part of the work, the values of physically normalized indicators of rheological parameters (the reduced index of viscous resistance and the indicator of the rheological nonlinearity of the melt) are determined and presented in the form of tables for widely used types of filled and unfilled thermoplastic polymers. A comparative analysis of these indicators has been carried out. Conclusions are given on the work and it is noted that the results of the research can be used in engineering practice, as well as in the educational process when performing rheological calculations of the processes of processing thermoplastic polymeric materials.

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4

Liang, Hu Nan, Zhu Long, and Shu Hui Yang. "Effect of Organic Bentonite on Rheological Properties of Paper Coating." Advanced Materials Research 197-198 (February 2011): 383–86. http://dx.doi.org/10.4028/www.scientific.net/amr.197-198.383.

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Effect of organic bentonite on rheological behavior of paper coating was studied. Organic bentonite was prepared by treating sodium bentonite with dimethyl diallyl ammonium chloride (DADMAC) at the following conditions: DADMAC 20%, reaction time 3h, reaction temperature 80°C and pH 9. The results showed that shear stress and voscosity of coating enhance with increasing the amount of organic bentonite. In this testing, all of flow curves fitted Cross model very much, and rheologiclal properties showed the pseudoplastic fluid, characterized as obvious shear thinning .The bentonite modified with DADMAC could promote the rheological behavior of coating.

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5

Zhao, Si Hai, Zhe Qian Zhao, Lin Yu Jiao, Yu Wei Hu, Ji Shen Dong, and Ji Ye Gao. "Study of Nanoparticle Iron-Nitride MRF and its Rheological Characteristic." Advanced Materials Research 774-776 (September 2013): 650–53. http://dx.doi.org/10.4028/www.scientific.net/amr.774-776.650.

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The gas-liquid reaction method was used to prepare the nanoparticle iron-nitride magneto-rheological fluid (MRF), the experiment study of magnetic characteristic and rheologic characteristic of the MRF has been done. The magnetic saturation of iron-nitride MRF prepared is higher than the pure iron MRF, and the sedimentation stability of the iron-nitride MRF is very good, the yield stress of iron-nitride magneto-rheological fluid prepared reached 26KPa at 0.8 Tesla additional magnetic density.

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6

lijima, Shigeruko, Fujio Otsuka, and Yuji Kikuchi. "Unsei-in Inhibits Rheological Activity of Leukocytes: Mechanism of Action in Neutrophil-related Skin Diseases." American Journal of Chinese Medicine 23, no. 01 (January 1995): 81–90. http://dx.doi.org/10.1142/s0192415x95000110.

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To investigate the efficacy of Unsei-in on skin diseases such as Behçet's disease, palmoplantar pustulosis and psoriasis vulgaris, the rheological activity of leukocytes as manifested by adhesiveness, deformability and aggregability was studied in vitro using a micropore filtration method. Unsei-in inhibited the rheological activity of leukocytes at a statistical significance of p < 0.01 in normal individuals whose leukocytes had been stimulated with N-formyl-methionyl-leucyl-phenylalanine (FMLP). It did not, however, inhibit the activity of cells that had not been stimulated by FMLP. In contrast, in Behçet's disease, Unsei-in inhibited rheological activity of non-stimulated leukocytes ( p < 0.01) but did not inhibit the rheological activity of FMLP-stimulated leukocytes. In a study using Ouren-gedoku-to and Shimotsu-to, the main constituents of Unsei-in, the latter inhibited the activity of FMLP-stimulated leukocytes in normal individuals ( p < 0.02). These results indicate that Unsei-in has an inhibitory effect on rheologically-activated neutrophils, which are involved in the healing mechanisms of the above skin diseases, and it also has a satisfactory effect in the form of a mixture of Shimotsu-to and Ouren-gedoku-to.

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7

Arcaro, Sabrina, João Batista Rodrigues Neto, Francielly Roussenq Cesconeto, Jaime Domingos Teixeira, Fabiano Raupp-Pereira, and Antonio Pedro Novaes de Oliveira. "Processing of Silicas Formed by Slip Casting." Materials Science Forum 775-776 (January 2014): 525–28. http://dx.doi.org/10.4028/www.scientific.net/msf.775-776.525.

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In this work suspensions containing natural amorphous silica fibers (NASF), amorphous silica gel and nanometric colloidal amorphous silica were prepared and rheologically analyzed. The suspensions were prepared by varying the volume percentage of solids between 22 and 32%, ammonium polyacrylate (APA), as dispersant, from 0 to 5% and polyvinyl alcohol (PVA), as binder, between 1 and 3.5%. The mixtures were obtained in a propeller mechanical mixer and formed by slip casting. The results of rheological characterization indicated that the suspensions with 30% solids, 4% dispersant and 3% binder were those that showed a stable rheological system and suitable for processing by slip casting.

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8

Ewoldt, Randy H. "Predictions for the northern coast of the shear rheology map: XXLAOS." Journal of Fluid Mechanics 798 (May 31, 2016): 1–4. http://dx.doi.org/10.1017/jfm.2016.265.

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A new paradigm of rheological characterization, oscillatory simple shear with infinite forcing amplitudes, is introduced by Khair (J. Fluid Mech., vol. 791, 2016, R5). This pushes the technique of large-amplitude oscillatory shear (LAOS) to have two extremely large amplitudes (both strain-rate and strain), which we might call XXLAOS. Model-specific analytical predictions are derived for a suspension of nearly spherical rigid particles subject to Brownian rotational diffusion. The work illuminates a new regime of rheological characterization that may serve as a distinct proving ground for constitutive model selection and for probing the flow physics of rheologically complex fluids.

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9

Filisko, Frank E., and Adam Schubring. "THE ANOMALOUS DISPERSION AND RHEOLOGICAL RESPONSE OF ER MATERIALS." International Journal of Modern Physics B 10, no. 23n24 (October 30, 1996): 3367–73. http://dx.doi.org/10.1142/s0217979296001811.

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A large low frequency dielectric dispersion, termed anomalous because it’s source is not clear, is observed in all ER active materials. It follows a classical Arrhenius behavior and as such, characteristc frequencies can be obtained for various temperatures. However it has not been directly associated with the rheological behavior of ER materials. In this study, rheological response times were obtained for an ER material by recording the response to a step increase in field. The response times of 41 msec. obtained dielectrically and 30 msec. obtained rheologically strongly indicate that the anomalous dispersion is associated with the mechanical ER phenomenon.

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10

Gordeeva, I. V., T. V. Dudareva, I. A. Krasotkina, V. N. Gorbatova, V. G. Nikol'skiy, U. G. Zvereva, and A. G. Obukhov. "Bitumen Resistance to Plastic Deformation at High Temperatures." Нефтехимия 63, no. 3 (June 15, 2023): 314–28. http://dx.doi.org/10.31857/s0028242123030036.

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A number of Russian bitumen samples with the penetration range of 60 to 120×0.1 mm were rheologically investigated in the temperature range of 46–70°C to evaluate their resistance to plastic rutting using relevant oscillatory and rotational rutting parameters. Based on an assessment of correlations between structural and rheological parameters, the best correlations were observed between the Gaestel Colloidal Index (CI) and the rheological parameters R3.2 and tgδ. The study demonstrated that modified bitumen must be used for pavements with extreme (“E”) traffic loading in Russian regions where PG 52 or higher grade binders are required.

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11

Susan-Resiga, Daniela. "A Rheological Model for Magneto-rheological Fluids." Journal of Intelligent Material Systems and Structures 20, no. 8 (March 16, 2009): 1001–10. http://dx.doi.org/10.1177/1045389x08100979.

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12

Ngai, K. L., and D. J. Plazek. "Thermo-Rheological, Piezo-Rheological, and TVγ-Rheological Complexities of Viscoelastic Mechanisms in Polymers." Macromolecules 47, no. 22 (November 10, 2014): 8056–63. http://dx.doi.org/10.1021/ma501843u.

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13

Hirai, S., and S. Tomokuni. "Dynamic Modeling of Rheological Deformation." Proceedings of JSME annual Conference on Robotics and Mechatronics (Robomec) 2004 (2004): 85. http://dx.doi.org/10.1299/jsmermd.2004.85_2.

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14

OTSUBO, Yasufumi. "Rheological Measurement." Journal of the Japan Society of Colour Material 76, no. 6 (2003): 235–39. http://dx.doi.org/10.4011/shikizai1937.76.235.

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15

Morian, Nathan, Cheng Zhu, and Elie Y. Hajj. "Rheological Indexes." Transportation Research Record: Journal of the Transportation Research Board 2505, no. 1 (January 2015): 32–40. http://dx.doi.org/10.3141/2505-05.

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16

Maitland, G. C. "Rheological Measurement." Journal of Non-Newtonian Fluid Mechanics 36 (December 1990): 428–29. http://dx.doi.org/10.1016/0377-0257(90)85024-s.

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17

Kaye, A. "Rheological measurement." Polymer 30, no. 5 (May 1989): 956. http://dx.doi.org/10.1016/0032-3861(89)90202-4.

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18

Brostow, Withold. "Rheological measurement." Materials Chemistry and Physics 21, no. 3 (March 1989): 319. http://dx.doi.org/10.1016/0254-0584(89)90126-0.

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19

Belyakova, E. A., R. Moskvin, and V. S. Yurova. "High-Quality Cement-Mineral Suspensions Using Stone Crushing Waste." Materials Science Forum 992 (May 2020): 124–29. http://dx.doi.org/10.4028/www.scientific.net/msf.992.124.

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The quality of concrete is determined by the physico-mechanical and rheological properties of the original components. Rheological properties depend on the amount and concentration of the rheological matrix. Cement-mineral matrices of modern high-quality concrete are rheologically active suspensions which allow to provide the necessary fluidity and mobility of the concrete mix, as well as the required strength of concrete. The multicomponent composition of the water-dispersed phase is represented by cement, stone flour and hyperplasticizer. The article presents the results of studies confirming the possibility of replacing finely ground quartz with other highly dispersed rocks, including stone-crushing waste. It was revealed that increasing in the concentration of the water-dispersed phase by 10% made it possible to reduce the water-solid ratio while maintaining the required mobility of the mixture, and in some cases improved the spreadability of the suspension by 3-13%. It was determined that the physicomechanical properties of reaction-powder concretes depend on the density and porosity of finely dispersed components to a greater degree.

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20

Přidal, Antonín, Petr Trávníček, Jan Kudělka, Šárka Nedomová, Sylvie Ondrušíková, Daniel Trost, and Vojtěch Kumbár. "A Rheological Analysis of Biomaterial Behaviour as a Tool to Detect the Dilution of Heather Honey." Materials 14, no. 10 (May 11, 2021): 2472. http://dx.doi.org/10.3390/ma14102472.

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Heather honey is a valuable and rheologically special type of honey. Its above-average selling price may motivate its intentional violation with a mixture of honey from another botanical origin, the price of which is lower on the market. This work deals with the rheological properties of such devalued heather honey in order to determine the changes in the individual rheological parameters depending on the degree of dilution of the heather honey. For this purpose, a differently diluted heather honey sample series was created and the following rheological parameters were determined: hysteresis area, n-value, yield stress (τ0), parameter B (Weltman model), parameter ϕ, or parameter C (model describing the logarithmic dependence of the complex viscosity on the angular frequency). Part of the work was research into whether the set parameters can be used as comparative parameters. It was found that the hysteresis area does not appear to be a suitable relative comparison parameter due to the high variability. The parameters that appear to be suitable are the relative parameters n-value and the parameter ϕ, which showed the greatest stability. The change in the determined rheological parameters is, depending on the degree of dilution, non-linear with a step change between the samples containing 40% (w/w) and 60% (w/w) of a heather honey.

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21

Wang, Hongbo, Xinyi Liang, Jifan Guo, and Chungeng Zhu. "Rheological properties of micro-nano magneto-rheological fluid." Materials Express 9, no. 7 (October 1, 2019): 827–30. http://dx.doi.org/10.1166/mex.2019.1555.

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In this paper, a novel micro-nano Magneto-rheological Fluid (MR) is proposed, and its mechanical performance, mainly including the shear torque and normal stress, is studied. Here, the magnetic particle in this kind of smart fluid is composed by the micro and nano particle, that is, produced by adding some nano magnetic or nonmagnetic particles into the traditional MR fluid (its particle size about 1–10 μm). A set of testing system, mainly including the plate-on-plate shearing test rig, is built to investigate the effect of the added percent of particles on the mechanical performances of MR fluid. In the condition of a constant shear rate, if the mass fraction of the nano particles is a constant, for example 4%, with the increasing of the magnetic induction intensity, the shear torque will also increase. The normal force increases rapidly with the increasing of mass fraction of the nano particles and decrease gradually.

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22

Hammadi, Larbi, Wissem Boudouaia, and Yamina Belaid. "Amelioration of mechanical and rheological characteristics of a ceramic Slip by adding of bentonite." Journal of Building Materials and Structures 5, no. 1 (June 4, 2018): 14–21. http://dx.doi.org/10.34118/jbms.v5i1.40.

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This work is a contribution to the amelioration of the mechanical and rheological properties of a slip of ceramic used in the ceramic fabrication process. A study of characterization of slip of ceramic modified by bentonite has been accomplished chemically, physically, mechanically and rheologically. Chemical analysis showed that the slip modified by bentonite consist essentially of silica with a ratio (SiO_2/Al_2 O_3) average equal to 3.5 and the ratio of clays (Al2O3/SiO2) is relatively stable with increasing percentage of bentonite in the slip, with an average 0.28. The mechanical and rheological tests showing that increasing the percentage of bentonite in base slip caused an increase in the mechanical resistance, the yield stress and rapid decrease in density of the slip.

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23

Jiang, Yu Zhou, and Rui Hong Wang. "Sandstone Unloading Rheological Test and Model Parameters Study." Advanced Materials Research 197-198 (February 2011): 1473–79. http://dx.doi.org/10.4028/www.scientific.net/amr.197-198.1473.

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Rock rheology is common in engineering practice, which has an effect on long-term security and stability of the project. In order to understand the rheological mechanical properties under the condition of unloading sand, automatic servo apparatus of triaxial creep of rock was used to have a rheological mechanical unloading triaxial test on sandstone, which got typical flow complete curves of rock. Rheological test results showed that rheological phenomena occured in sandstone, and its rheological properties were significant with large rheological deformation, especially in high-stress conditions, When the external load exceeded the long-term strength of rock samples, specimen deformation went through three typical rheological stages with time increasing, and ultimately speed up the flow breakdown. Based on the experimental results, analyzed and studied the rheological parameters that were obtained, and discussed unsteady character law of rheological parameters. defined rheological damage of rock in the accelerating flow process as the unloading capacity and time-related exponential function, and proposed corresponding damage evolution equation, brought damage evolution equation into Burgers rheological model, and obtained nonlinear unloading model of rheological damage of rock, used accelerating rheological test curve of sandstone samples under the condition of 15MPa confining pressure and 135MPa stress level to verify nonlinear unloading model of rheological damage of rock, and the results showed that the fitting results of rheological test data and the improved rheological model had good consistency, and the rheological model can reflect the three stages of nonlinear rheology of rock, which can reflect the rheological characteristics under the condition of unloading sandstone more accurately.

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24

Nakano, Masami. "Rheological and Flow Properties of Electro-Rheological and Magneto-Rheological Fluids, and Their Engineering Applications." Proceedings of the Fluids engineering conference 2004 (2004): 199. http://dx.doi.org/10.1299/jsmefed.2004.199.

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25

Migliozzi, Simona, Panagiota Angeli, and Luca Mazzei. "Effect of D-Mannitol on the Microstructure and Rheology of Non-Aqueous Carbopol Microgels." Materials 14, no. 7 (April 4, 2021): 1782. http://dx.doi.org/10.3390/ma14071782.

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D-mannitol is a common polyol that is used as additive in pharmaceutical and personal care product formulations. We investigated its effect on the microstructure and rheology of novel non-aqueous Carbopol dispersions employing traditional and time-resolved rheological analysis. We considered two types of sample, (i) fresh (i.e., mannitol completely dissolved in solution) and aged (i.e., visible in crystalline form). The analysis of the intracycle rheological transitions that were observed for different samples revealed that, when completely dissolved in solution, mannitol does not alter the rheological behaviour of the Carbopol dispersions. This highlights that the chemical similarity of the additive with the molecules of the surrounding solvent allows preserving the swollen dimension and interparticle interactions of the Carbopol molecules. Conversely, when crystals are present, a hierarchical structure forms, consisting of a small dispersed phase (Carbopol) agglomerated around a big dispersed phase (crystals). In keeping with this microstructural picture, as the concentration of Carbopol reduces, the local dynamics of the crystals gradually start to control the integrity of the microstructure. Rheologically, this results in a higher elasticity of the suspensions at infinitesimal deformations, but a fragile yielding process at intermediate strains.

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26

Jiang, Yu Zhou, and Rui Hong Wang. "Experimental Investigation on Triaxial Rheological Mechanical Properties of Biotite Granitic Gneiss." Applied Mechanics and Materials 90-93 (September 2011): 311–16. http://dx.doi.org/10.4028/www.scientific.net/amm.90-93.311.

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In order to know about the rheological properties of typical biotite granitic gneiss in Xiaowan Hydropower Project, triaxial rheological experiments with biotite granitic gneiss were carried out on the rock servo-controlling rheological testing machine. As a result the typical complete rheological curve of the biotite granitic gneiss indicates that when the stress level is low, the rheological deformation of rock specimen is not obvious; when in high stress conditions, the rock mass rheological properties are very significant with large rheological deformation, including three typical rheological phases. The rheological deformation decreases with the increase of the confining pressure, and at the same time the rheological rate of rock specimen changes with the change of stress level. In low stress state, the corresponding rheological rate of the rock specimen incarnated as the rheological rate attenuation stage and the rheological rate uniform stage, while once the stress level exceeds the long-term strength of rock specimen, the rheological rate would first decreases and then keep at a constant value, and finally it will trend to follow the non-linear acceleration law. The rupture form of the low-intensity biotite granitic gneiss specimen is the main crack surface which causes the damage of rock specimen, and finally generated by the expansion and transfixion of the crack in the initial cavern flaw. The rheological deformation and rupture form of rock specimen in different confining pressures are not exactly the same.

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27

Harun, Mohd Ruzi, N. Muhamad, Abu Bakar Sulong, Nor Hafiez Mohamad Nor, and Mohd Halim Irwan Ibrahim. "Rheological Investigation of ZK60 Magnesium Alloy Feedstock for Metal Injection Moulding Using Palm Stearin Based Binder System." Applied Mechanics and Materials 44-47 (December 2010): 4126–30. http://dx.doi.org/10.4028/www.scientific.net/amm.44-47.4126.

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This paper investigates the characteristic important to metal injection moulding (MIM) process via rheological behavior of MIM feedstock. A gas atomized spherical ZK60 magnesium (Mg) alloy powder and the binder of 60wt.% palm stearin (PS) + 40wt.% low density polyethylene (LDPE) were used in this investigation. Prior to mixing process, critical powder volume percentage (CPVP) was determined and subsequently four different feedstocks with powder loading of 62, 64, 66 and 68vol.% were prepared. The properties of the feedstocks were then analyzed rheologically. Here, the flow behavior index n, the flow activation energy E and the mold ability index αSTV of the Mg alloy MIM feedstocks were determined. Results show that feedstock with 64% powder loading has the best rheological properties and therefore it is considered to be the best for the injection moulding process.

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28

Minagawa, Keiji, and Kiyohito Koyama. "Electro- and Magneto-Rheological Materials: Stimuli-Induced Rheological Functions." Current Organic Chemistry 9, no. 16 (November 1, 2005): 1643–63. http://dx.doi.org/10.2174/138527205774610930.

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Shea, J. J. "Electro-rheological fluids and magneto-rheological suspensions [Book Review]." IEEE Electrical Insulation Magazine 17, no. 5 (September 2001): 58–61. http://dx.doi.org/10.1109/mei.2001.954578.

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Xu, Jingyuan, and James A. Kenar. "Rheological and Micro-Rheological Properties of Chicory Inulin Gels." Gels 10, no. 3 (February 28, 2024): 171. http://dx.doi.org/10.3390/gels10030171.

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As a soluble fiber, inulin is present in many plants and has many applications in food and non-food products. In this work, we investigated the rheological properties of inulin dispersions at seven concentrations. The linear viscoelastic properties of inulin were determined using a conventional mechanical rheometer. At 25 wt%, inulin exhibited fluid-like viscoelastic liquid behavior. However, when concentrations were ≥27.5 wt%, inulin exhibited gel-like viscoelastic properties. The viscoelastic properties (moduli and viscosities) increased with increasing inulin concentration. The high-frequency linear rheological properties of inulin were also investigated using the modern light scattering technique, diffusion wave spectroscopy (DWS). The diffusion wave spectroscopy (DWS) measurements showed the amplitude of complex moduli (|G*(ω)|) of inulin gels (≥27.5 wt%) to be proportional to ½ power law of the frequency, which suggests inulin gels behave similarly to flexible polymers. The non-linear steady shear experiments demonstrated that inulin exhibited shear-thinning behavior that was well fitted by a power law constitutive model. The trend of the power law exponent from the experiments indicated that the shear-thinning extent for inulin was greater as the inulin concentration increased. The results of this work indicated that the properties of inulin gel can be manipulated by altering its concentration. Therefore, the desired inulin product can be designed accordingly. These results can be used to direct further food and non-food applications, such as wound healing materials for inulin gels.

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31

Ahamed, Raju, Seung-Bok Choi, and Md Meftahul Ferdaus. "A state of art on magneto-rheological materials and their potential applications." Journal of Intelligent Material Systems and Structures 29, no. 10 (February 14, 2018): 2051–95. http://dx.doi.org/10.1177/1045389x18754350.

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Smart materials are kinds of designed materials whose properties are controllable with the application of external stimuli such as the magnetic field, electric field, stress, and heat. Smart materials whose rheological properties are controlled by externally applied magnetic field are known as magneto-rheological materials. Magneto-rheological materials actively used for engineering applications include fluids, foams, grease, elastomers, and plastomers. In the last two decades, magneto-rheological materials have gained great attention of researchers significantly because of their salient controllable properties and potential applications to various fields such as automotive industry, civil environment, and military sector. This article offers a recent progressive review on the magneto-rheological materials technology, especially focusing on numerous application devices and systems utilizing magneto-rheological materials. Conceivable limitations, challenges, and comparable advantages of applying these magneto-rheological materials in various sectors are analyzed critically, which provides a clear pathway to the researchers in selecting and utilizing these materials. The review starts with an introduction to the elementary description of magneto-rheological materials and their significant contribution in various fields. Following this, different types of the magneto-rheological materials, modeling of the magneto-rheological materials, magneto-rheological material–based devices, and their applications have been extensively reviewed to promote practical use of magneto-rheological materials in a wide spectrum of the application from the automobile to medical device.

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32

Qiu, Zhenfeng, Ting Cao, Yongsuo Li, Junjie Wang, and Yulong Chen. "Rheological Behavior and Modeling of a Crushed Sandstone-Mudstone Particle Mixture." Processes 6, no. 10 (October 16, 2018): 192. http://dx.doi.org/10.3390/pr6100192.

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A mixture of sandstone and mudstone particles is often used as the main filling material for many agriculture-related and civil engineering projects, including rock-fill dams and foundations. The long-term rheological deformation experienced by rock-fill dams and foundations filled with this mixture is much bigger than that of coarse-grained and cohesive soils, due to the deterioration and softening of the mudstone particles. This study focuses on the rheological deformation of a sandstone-mudstone particle mixture, prepared by mixing sandstone and mudstone particles, based on the content by weight of four mudstone particle types. Confined uniaxial compression tests were performed to test the rheological deformation of 24 samples of the mixture, and a stress-strain curve was obtained for each test. On the basis of compression curves, the rheological process of the mixture was divided into four phases: linear, attenuation rheological, secondary attenuation rheological and stable phases. The three defining features of the curve, namely the rheological attenuation factors, attenuation rheology critical strain and limited rheological strain, were then determined and modeled. A segmented rheological model was then proposed, based on a modified attenuation rheological constitutive model for coarse-grained soil. The modelled results compared well with the experimental data, and the modelled compression-curve prediction was able to describe the two-stage attenuation rheology features (attenuation rheological and secondary attenuation rheological phases) of the sandstone-mudstone particle mixture.

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Akhavan, J. "Electro-rheological polymers." Proceedings of the Institution of Mechanical Engineers, Part G: Journal of Aerospace Engineering 221, no. 4 (April 2007): 577–87. http://dx.doi.org/10.1243/09544100jaero142.

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Bullough, W. A. "A rheological semiconductor." Advanced Materials for Optics and Electronics 1, no. 4 (August 1992): 159–71. http://dx.doi.org/10.1002/amo.860010402.

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Concilio, Antonio, Salvatore Ameduri, Ignazio Dimino, and Rosario Pecora. "Magneto-Rheological Fluids." Applied Sciences 13, no. 8 (April 18, 2023): 5044. http://dx.doi.org/10.3390/app13085044.

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NAKANO, Masami. "Rheological Properties and Flow Behavior of Electro-/Magneto-Rheological Fluids." Journal of the Visualization Society of Japan 27, no. 105 (2007): 103–10. http://dx.doi.org/10.3154/jvs.27.103.

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37

Hedrih, K. (Stevanović). "Analogy between dynamics of thermo-rheological and piezo-rheological pendulums." Journal of Physics: Conference Series 96 (February 1, 2008): 012219. http://dx.doi.org/10.1088/1742-6596/96/1/012219.

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Torres Valenzuela, Laura Sofia, Alfredo Adolfo Ayala-Aponte, and Liliana Serna. "Viscoelastic behavior of yellow pitahaya treated with 1-MCP." DYNA 83, no. 196 (April 20, 2016): 119–23. http://dx.doi.org/10.15446/dyna.v83n196.50402.

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<p>Foods may have both solid and liquid properties, and are described as viscoelastic products. Knowledge on such viscoelastic features is very useful for quality control and/or food stability. The purpose of this work was to evaluate the effect of the application of 1-MCP on the viscoelastic properties of minimally processed yellow pitahaya during refrigeration storage, by using a stress relaxation test. Viscoelastic parameters were determined through Generalized Maxwell and Peleg’s rheologic models. Both rheological models proved suitable to predict viscoelastic behavior; however, Peleg’s model better described this behavior. Samples of treated and non-treated pitahaya with 1- MCP decreased their elastic behavior (firmness decrease) during storage. Fruit treated with 1-MCP showed a greater elastic component than non-treated samples during storage. These two rheological models were suitable for predicting the viscoelastic behavior, however.</p>

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Tyagi, R. K., Preeti Joshi, and R. S. Pandey. "Investigation of Various Parameters in Magneto-Rheological Dampers." International Journal of Engineering and Advanced Technology 11, no. 3 (February 28, 2022): 135–40. http://dx.doi.org/10.35940/ijeat.c3371.0211322.

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Automobile industry and magneto-rheological dampers are now a new area of research. Magneto-rheological mufflers utilize the energy generated by magnetic fields, and scientists have initiated a re-consideration of new damping systems. The suspension system based on magneto-rheological fluid in modern era is becoming an intelligent system with superior properties such as strength, controllability, range, response time, energy utilization, structure etc. In magneto-rheological dampers number of required components are too less which leads to cost effective suspension. In this exploration, a magneto-rheological damper was fabricated, and experimental study had been performed. The magneto-rheological damper's construction cost is not as much since it doesn’t have intricate components. The modern enquiries the consequences of magnetic field/current on applied load, yield stress, and stress developed in suggested magneto-rheological dampers. The experimental results illustrate the effect of external load, yield stress, & stress generated in suggested dampers depends on magnitude of current/magnetic field. The experimental investigation also demonstrates that magneto-rheological dampers work at a specific threshold magnetic field substandard to critical value of a magnetic field, magneto-rheological fluid reposes in a liquid phase. The threshold magnetic field and mechanical properties are inter-related with each other in magneto-rheological based dampers.

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Xing, Hui Ge, Da Lu Tan, and Fu Gang Xu. "A Damage Rheological Constitutive Model for Greenschist." Applied Mechanics and Materials 170-173 (May 2012): 647–50. http://dx.doi.org/10.4028/www.scientific.net/amm.170-173.647.

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The stress-strain of triaxial rheological test for rock can be divided into three stages: initial attenuation rheological stabilization rheoligical and speedup rheological stages, the damage is rapid increased in the speedup stage. Damage mechanics is introduced into the Nishihara rheological model, a new rheological constitutive model is established which is combined with the concept of effective stress. The mechanical parameters are recognized by the experimental test data of greenschist. Computing result shows that, the presented model can described the mechanical characteristics in different rheological stage very well, and the error between simulated result and test data is small.

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Stan, A., I. Dinca, C. Ban, S. Ilina, Dan Donescu, H. Paven, L. Dumitrache, L. Gavrila, and I. Voicu. "Epoxy-Layered Silicate and Epoxy MWCNTs Nanocomposites." Applied Mechanics and Materials 146 (December 2011): 160–69. http://dx.doi.org/10.4028/www.scientific.net/amm.146.160.

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The paper deals with the rheological properties of epoxy resin additivated with organically modified montmorillonites, carbon nanotubes and nanocarbon. The paper also presents the influence of nanoadditives over composites mechanical properties. The epoxy polymer is diglycidyl ether of bisphenol A (DGEBA) and the curing agent is an aliphatic tetraamine. Organically modified montmorillonites Cloisite 30B and Cloisite 93A, MWCNTs and laser synthesized nanocarbon were used to synthesize nanocomposites by dispersing each in an epoxy resin. The dispersion was achieved through mechanical and sonic methods. The epoxy resin additivated with nanosized fillers was rheologically tested to study the dispersion influence. The sonic dispersion of nanoadditives is observed to drastically influence the rheological behavior of the suspensions. Newtonian fluid behavior disappears as the additive loading increases. The work mentions the influence of nanoadditives on the manufacturing process of epoxy /glass fibre and epoxy/ carbon fibre laminated composites.

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Zieliński, K. "Analysis of Rheological State of SBS Modified Bitumens Based on Viscosity Measurements." Archives of Civil Engineering 59, no. 1 (March 1, 2013): 143–53. http://dx.doi.org/10.2478/ace-2013-0007.

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Abstract Each bitumen has a slightly different group composition, thus bitumen modification with the SBS copolymer gives slightly different results in each case. Both in the industry and construction practice there is still no simple method available which would allow the evaluation of the impact of SBS content and the group composition of bitumen on the structural and rheological properties of the polymer bitumen mix. The article presents the results of the dynamic viscosity tests of three bitumen types. Based on the analysis of the results obtained, it was found that changes in the rheological properties caused by SBS additive are characteristic for each of the bitumens tested and their chemical and group composition. They are also proportionate to the amount of the modifier added. In order to have a possibility to measure this impact, three coefficients rheologically characterizing polymer and bitumen mixes were applied.

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Chen, Xiao Bin, and Jia Sheng Zhang. "Large Scale Triaxial Rheological Apparatus Development and Granular Soils Rheological Properties Analysis." Applied Mechanics and Materials 90-93 (September 2011): 79–89. http://dx.doi.org/10.4028/www.scientific.net/amm.90-93.79.

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To study the granular soil’s rheological properties, a large triaxial rheological apparatus was developed by assemblying a axial pressure and confining pressure providing equipments for the SZ30-4 large scale triaxial apparatus, and the stability examinations proved that the stability of this pressure providing equipments was competent for granular soil’s rheological tests. The large triaxial rheological apparatus have the axial pressure ranging from 0 to 1.0 MPa, confining pressure of 50kPa, 100kPa, 150kPa, 200kPa, 250kPa and the soil sample dimension of Φ=300mm, h=600mm. A series of granular soil creep tests were executed on this apparatus. The tests discussion shows that stress conditions are the main factors, which affects the creep properties of granular soil. There are different rheological properties at different stress level. eg. at low stress level (S=0.1) for the elastic, at middling stress level (0.2<S≤0.6) for the linear viscoelastic and at high stress level (S>0.8) for the non-linear viscous plastic. The total rheological strain nonlinearly increase with stress level increments but linearly increase with confining pressure increments. According to the discussion of redstone granular soil’s creep properties, a rheological component based on hyperbola function was presented, and a nonlinear viscous elastioplastic rheological constitutive model was set up by putting the component and the Burgers model in series. The creep properties analysis shows the rheological model can describe the granular soil’s whole rheological phase well.

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Sabahaddin Bayramov, Sabahaddin Bayramov. "METHODS OF TRANSPORTATION AND NON-ISOTHERMAL MOVEMENT OF RHEOLOGICAL COMPLEX OILS." PAHTEI-Procedings of Azerbaijan High Technical Educational Institutions 06, no. 02 (April 9, 2021): 37–42. http://dx.doi.org/10.36962/pahtei0602202137.

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The article examines the non-isothermal effect of rheological compound oil and clarifies some methods of transportation of complex rheological characteristic oil and the effect of viscous liquids in pipes. The article presents several ways to improve oil transportation. These methods include the transportation of complex rheological oil with gas-saturated, thermally prepared, heated water. The most common method is to transport oil by heating with complex rheological properties. The pipeline through which heated oil is transported is called the hot pipeline. The article clarifies the movement of viscous liquids in pipes. Keywords: rheological oils, complex rheological properties, gas-saturated, thermally prepared, graphoanalysis, Gas-saturated transportation

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Ren, Liang, Yang Li, Bo Hu, and Min Jiang. "Study of Rheological Effects on the Stress and Deformation of the Sand-Gravel-Fill Dam." Advanced Materials Research 910 (March 2014): 297–303. http://dx.doi.org/10.4028/www.scientific.net/amr.910.297.

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This paper analyses and selects the rheological mechanism and rheological analysis of the sand-gravel-fill dam, and combines with concrete-face sand-gravel-fill dam engineering practice, using three-dimensional nonlinear finite element methods to analyze the rheological effects on stress and deformation of the dam, using two calculation program of considering sand-gravel rheological effects or not. Then analyze and compare the results of the two calculation program, and systematically summarize the rheological effects on stress and deformation of the dam.

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Li, Zhen, Xiaoli Zhao, Dezhi Zheng, Tingjian Wang, Le Gu, and Liqin Wang. "Study on rheological properties of aviation lubricating oil under conditions of heavy load, high speed, and high temperature." Industrial Lubrication and Tribology 71, no. 4 (May 7, 2019): 525–31. http://dx.doi.org/10.1108/ilt-09-2018-0345.

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Purpose This study aims to evaluate the rheological properties of aviation lubricating oil under conditions of heavy load, high speed and high temperature and the applicability of the classical rheological model under severe conditions. Design/methodology/approach A Chinese aviation lubricating oil was used and its traction curves were obtained using a new two-disk tribotester. Its rheological parameters were calculated based on empirical formulae. Moreover, the traction force was calculated based on the classical Eyring rheological model. Findings The traction curves are obtained with respect to contact pressure, temperature and rolling speed. The rheological parameters are significantly influenced by environmental factors, especially viscosity. The traction force calculated using the Eyring model is consistent with the experimental results. Originality/value A novel two-disk tribotester was designed using a gas bearing and speed–force closed-loop control to ensure measurement accuracy. The mechanism of rheological properties was analyzed and the applicability of the classical rheological model under severe conditions was verified. It provided an experimental and theoretical basis for expanding the application of classical rheological models under extreme conditions.

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Li, Mengyuan, Peiyu Yan, Jianguo Han, and Lijie Guo. "Which Is an Appropriate Quadratic Rheological Model of Fresh Paste, the Modified Bingham Model or the Parabolic Model?" Processes 10, no. 12 (December 5, 2022): 2603. http://dx.doi.org/10.3390/pr10122603.

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The physical meaning and calculating process of the rheological parameters of two nonlinear rheological models, the parabolic model and the modified Bingham model, were compared. The fluidity test and a rheological experiment on cementitious materials were performed. The Couette inverse problem is a key issue in measuring and solving the rheological parameters of fresh cementitious materials. The solution of the Couette inverse problem based on the modified Bingham model is discontinuous when the coefficient of the quadratic term is equal to zero, resulting in a large deviation between the fitting curve and the rheological experimental data. The credibility of the rheological parameters of the pastes calculated based on the modified Bingham model is low. The formulas for calculating yield stress, fiducial differential viscosity and the degree of shear thickening or shear thinning of the parabolic model have been developed. The credibility of the rheological parameters of the pastes calculated based on the parabolic model is high. The flow performance of the paste can be clearly characterized by the rheological parameters calculated with the parabolic model.

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Wang, Xingang, Lei Huang, and Junrong Zhang. "A Rheological Model of Sandstones considering Response to Thermal Treatment." Advances in Civil Engineering 2019 (April 1, 2019): 1–9. http://dx.doi.org/10.1155/2019/2143748.

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Time-dependent rheological response of geomaterials to thermal treatment is a crucial issue in geothermal energy utilization and deep mineral mining. This response, however, has not yet been fully considered in the existing rheological constitutive models for sandstones. In order to experimentally investigate such responses and establish the associated rheological constitutive model, this study considers the sandstone specimens which have been thermally treated under different temperatures. The triaxial rheological test in conjunction with the scanning electron microscope is employed in the investigation to observe the mechanically and macro-/micromorphologically rheological response. Investigation results show that the thermal treatment induces microcracks and microdefects, and subsequently, they propagate during the creep. As a consequence, the heterogeneous deformation occurs, and macrocracks are present, leading to the irregular fluctuation and mutation in strain over time. A higher temperature contributes to a more severe structure damage and in turn reduces the intactness of sandstones and elevates the rheological response. The investigation allows successful establishment of a three-dimensional constitutive equation considering the instantaneous elastic response to thermal treatment. Based on the equation, a nonlinear visco-elastoplastic rheological constitutive model is developed for sandstones. Comparison with three existing rheological models shows that the model developed in this study could well represent the rheological process of the thermally treated sandstones.

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Zheng, Xiao Ping, Hong Bin Li, and Ze Sheng Ji. "Investigation of the Semisolid Rheological Characteristics of AZ91D Alloy." Applied Mechanics and Materials 723 (January 2015): 742–46. http://dx.doi.org/10.4028/www.scientific.net/amm.723.742.

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The semisolid shear rheological characteristic of AZ91D alloy were investigated. The results show that: during the shear rheological test at 570 °C, a critical shear stress and a maximum shear stress are happened. And with holding time increasing, the solid fraction decreasing and the solid particles distributing more uniformly, the rheological rate increases but the critical and maximum shear stress decrease. At last, based on rheological theory, a five-component rheological model of the semisolid AZ91D alloy is established, which is H1 - (N1 / H2) - (N2 / S).

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Luo, Xiang Rong, Shu Zhong Wang, Ze Feng Jing, and Zhi Guo Wang. "Experimental Research on Rheological Properties of Slick Water Mixed with CO₂ System." Advanced Materials Research 910 (March 2014): 95–100. http://dx.doi.org/10.4028/www.scientific.net/amr.910.95.

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Rheological properties of slick water mixed with CO2 system are studied,through the large foam fracturing fluid of high temperature and high pressure experiment system,in detail in this paper, based on the principle of tube type rheometer. The influence laws temperature, foam quality, shear rate and pressure have on the rheological characteristics are studied. The fracturing fluid rheological parameters calculation correlations are also obtained, and the foam quality influence on rheological index and rheological coefficient of the slick water mixed with CO2 system are analyzed.

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