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Artykuły w czasopismach na temat „Thixotropy”

Autor: Grafiati

Data publikacji: 4 czerwca 2021

Data aktualizacji: 25 lipca 2025

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1

Lakie, Martin, and Kenneth S. Campbell. "Muscle thixotropy—where are we now?" Journal of Applied Physiology 126, no. 6 (2019): 1790–99. http://dx.doi.org/10.1152/japplphysiol.00788.2018.

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Relaxed skeletal muscle has an inbuilt resistance to movement. In particular, the resistance manifests itself as a substantial stiffness for small movements. The stiffness is impermanent, because it forms only when the muscle is stationary for some time and is reduced upon active or passive movement. Because the resistance to movement increases with time at rest and is reduced by movement, this behavior has become known as muscle thixotropy. In this short review, we describe the phenomenon of thixotropy and illustrate its significance in postural control with particular emphasis on human stand

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2

De Schryver, Robin, and Geert De Schutter. "Insights in thixotropic concrete pumping by a Poiseuille flow extension." Applied Rheology 30, no. 1 (2020): 77–101. http://dx.doi.org/10.1515/arh-2020-0103.

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AbstractThixotropy is a reversible time-dependent phenomenon in fluids, in which an internal structure grows due to flocculation and breaks down under shear action. Numerous fluids are thixotropic, e.g. concretes and cementitious suspensions. Pumping of concrete is an important application. Since current approaches omit thixotropic effects, we aim to develop a simple theoretical model to evaluate or understand the significance of thixotropy on the concrete pumping behaviour. We therefore extended Poiseuille flow for thixotropic concretes and reformulated it in a dimensionless form to gain insi

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3

Tang, Bin, Tianli Liu та Biaohe Zhou. "Duncan–Chang E-υ Model Considering the Thixotropy of Clay in the Zhanjiang Formation". Sustainability 14, № 19 (2022): 12258. http://dx.doi.org/10.3390/su141912258.

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The clays of the Zhanjiang Formation in the coastal area of Beibu Gulf of China are thixotropic, and the existing constitutive relationship models relevant for clay are incapable of accurately simulating their stress–strain relationships. It is vital to study the changes of mechanical properties of Zhanjiang Formation clay that occur during thixotropy, and to establish a constitutive model considering thixotropy. The varying measures of its shear strength, cohesion, internal friction angle, and initial tangential modulus during thixotropy were investigated by means of triaxial consolidation an

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4

Shao, Peng, Yu Yang Liu, Li Fen Zhou, and Yu Qi Wu. "Progress in Research on Explosion Induced Thixotropy of Concrete." Materials Science Forum 675-677 (February 2011): 643–46. http://dx.doi.org/10.4028/www.scientific.net/msf.675-677.643.

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Thixotropy is an important property possessed by fresh concrete of changing from gel to liquid under shearing stress and returning to the original state when at rest. The thixotropic process is usually described to be an isothermal and static (or quasi-static) gel-sol-gel transformation. Now the thixotropy of concrete subjected to explosive loads became a new subject in research of synchronous explosive lining technology, which offers an advanced trechless method for underground space construction in soil. Because the detonation of explosives is a short-duration process accompanying with high

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5

Gu, Ling Ya, Kai Yuan Luo, Bei Qing Huang, and Yin Di Song. "Effects of Fillers on the Transfer Properties of UV Waterless Offset Ink." Applied Mechanics and Materials 262 (December 2012): 510–13. http://dx.doi.org/10.4028/www.scientific.net/amm.262.510.

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In order to investigate the effects of fillers on the transfer properties of UV waterless offset ink, four ink samples compound with different fillers(SiO2 , CaCO3 and Talc) were prepared, the flow curve, thixotropy and ink transferred ratio were tested, and the effects of rheological properties on ink-transfer were discussed. The results show that: all of four ink samples show a typical shear thinning characteristics. Sample use SiO2 and CaCO3 as fillers has a higher viscosity, and with the increase of shearing rate, the viscosity decreased sharply. Sample use SiO2 and CaCO3 as fillers has th

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6

Sen, Samya, and Randy H. Ewoldt. "Thixotropic spectra and Ashby-style charts for thixotropy." Journal of Rheology 66, no. 5 (2022): 1041–53. http://dx.doi.org/10.1122/8.0000446.

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There is no universal model for thixotropy, and comparing thixotropic effects between different fluids is a subtle yet challenging problem. We introduce a generalized (model-insensitive) framework for comparing thixotropic properties based on thixotropic spectra. A superposition of exponential stress modes distributed over thixotropic time scales is used to quantify buildup and breakdown times and mode strengths in response to step-change input. This mathematical framework is tested with several experimental step-shear rate data on colloidal suspensions. Low-dimensional metrics based on moment

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7

Tang, Bin, Biaohe Zhou, Liang Xie, Jianfeng Yin, Shengnan Zhao, and Zhibing Wang. "Strength Recovery Model of Clay during Thixotropy." Advances in Civil Engineering 2021 (February 2, 2021): 1–11. http://dx.doi.org/10.1155/2021/8825107.

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Thixotropy is a hot topic in the field of rheology of dispersed systems. Many researchers have proposed different models and hypotheses to explain the thixotropy of clay. In this paper, the strength recovery model of Zhanjiang Formation clay in the process of thixotropy is studied. Firstly, through unconfined compressive strength test, the influence of soil sensitivity, moisture content, and density on the strength growth of remolded soil was studied. The results show great influence of sensitivity, moisture content, and density on the thixotropic strength of the Zhanjiang Formation clay: the

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8

Yang, Xu, Wen Chen, Rui Xiao, and Leevan Ling. "A fractional model for time-variant non-Newtonian flow." Thermal Science 21, no. 1 Part A (2017): 61–68. http://dx.doi.org/10.2298/tsci160426245y.

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This work applies a fractional flow model to describe a time-variant behavior of non-Newtonian substances. Specifically, we model the physical mechanism underlying the thixotropic and anti-thixotropic phenomena of non-Newtonian flow. This study investigates the behaviors of cellulose suspensions and SMS pastes under constant shear rate. The results imply that the presented model with only two parameters is adequate to fit experimental data. Moreover, the parameter of fractional order is an appropriate index to characterize the state of given substances. Its value indicates the extent of thixot

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9

L., Shu-Ping, Wan-Guo H., Wei-An ZH., and Hong-Dong D. "The influence of shear rate and rest time on the thixotropy of the complex thixotropic suspension of Fe-Al-Mg-MMH/montmorillonite." Journal of Indian Chemical Society Vol. 80, Mar 2003 (2003): 160–62. https://doi.org/10.5281/zenodo.5837554.

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Key Laboratory for Colloid and Interface Chemistry of Education Ministry, Shandong University, Jinan, Shandong 250100, P. R. China <em>E-mail:</em> wghou_cn@yahoo.com.cn <em>Manuscript received 5 November 2001. revised 28 August 2002. accepted 18 December 2002</em> We have studied the influence of the measuring conditions on the thixotropy of the complex thixotropic system with the weight ratio of Fe-Al-Mg-MMH-to-montmorillonite (<em>R</em>) being 0.051, especially the effect of the shear rate (D<sub>1</sub>) after high-intense shearing and the rest time (t<sub>s</sub>) before measuring t

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10

Nicia, David, Nicholas Fobbe, Daniel Jansen, and Dirk Lowke. "Rheology of low‐clinker suspensions: Multiscale comparison of the effect of PCE on thixotropy." ce/papers 6, no. 6 (2023): 705–14. http://dx.doi.org/10.1002/cepa.2811.

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AbstractAddressing climate change requires reducing the carbon footprint of cement‐based building materials on a global scale. One promosing approach involves decreasing the clinker content by incorporating fine supplementary cementitious materials (SCM), which, however, can increase the stickiness of fresh concrete. Along with viscosity, thixotropic structural build‐up is a critical rheological parameter that impacts the stickiness of the SCM‐rich suspensions. Thus, it is essential to gain a precise understanding of how the molecular structure and mode of addition of polycarboxylate ethers (P

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11

Ma, Xiaoyan, Yubo Wang, Junpeng Hou, Yanping Sheng, Wanpeng Zheng, and Shujuan Wu. "Study on Thixotropic Properties of Asphalt Mastics Based on Energy Viewpoint." Coatings 13, no. 3 (2023): 650. http://dx.doi.org/10.3390/coatings13030650.

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An asphalt mastic has thixotropic characteristics that significantly influence its fatigue and healing performance. Therefore, understanding the thixotropy of an asphalt mastic is clearly of great importance. However, research in this area is still in the early stages. This study focuses on self-heating as one of the biasing performances of asphalt material by analyzing the viscosity, stress, and hysteresis loops the of asphalt mastics under cyclic shear loading. Twelve types of asphalt mastics fabricated with asphalt, as well as different types of mineral filler, were selected to examine thix

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12

Guo, Li Ping, Lei Wang, and Yi Min Zhang. "Evaluation of Thixotropic Models of Waxy Crude." Advanced Materials Research 581-582 (October 2012): 85–88. http://dx.doi.org/10.4028/www.scientific.net/amr.581-582.85.

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Thixotropy, which is an important rheological behavior of waxy crudes, is very important to the hydraulic characteristics and safety of the restart process of crude oil pipelines. Thixotropic behaviors of four waxy crudes were studied experimentally under three kinds of loading conditions, which were constant shear rate, stepwise increase of shear rate and cyclic change of shear rate, namely hysteresis loop. Eight thixotropic models were evaluated by least-square regressions based on experimental data. The average absolute deviation was taken as the measurement of fitness of a model. It is con

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13

Lakevičs, Vitālijs, Valentīna Stepanova, Santa Niedra, Inga Dušenkova, and Augusts Ruplis. "Thixotropic Properties of Latvian Illite Containing Clays." Environment. Technology. Resources. Proceedings of the International Scientific and Practical Conference 1 (August 6, 2015): 133. http://dx.doi.org/10.17770/etr2013vol1.813.

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Thixotropic properties of Latvian Devonian and Quaternary clays were studied. Dynamic viscosity of the water clay suspensions were measured with a rotating viscometer. Influence of concentration, pH and modifiers on the thixotropic clay properties was analyzed. It was found that Latvian clays have thixotropic properties. Stability of clay suspensions is described with the thixotropy hysteresis loop. Increasing the speed of the viscometer rotation, dynamic viscosity of the clay suspension decreases. It was found that the solid phase concentration and mineralogical composition make an impact on

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14

Joshi, Yogesh M. "PERSPECTIVE: Analysis of thixotropic timescale." Journal of Rheology 68, no. 4 (2024): 641–53. http://dx.doi.org/10.1122/8.0000816.

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Thixotropy is characterized by a time-dependent rise in viscosity under no or weak flow conditions and a decrease in viscosity over time when subjected to strong flow conditions. The characteristic timescale associated with the thixotropic phenomenon, particularly how the viscosity increases with time, has been termed the thixotropic timescale. Several approaches have been suggested in the literature for estimating the thixotropic timescale. The most prominent approach, however, infers it from a specific form of a kinetic expression for structure parameter evolution. In this paper, we study th

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15

Skadsem, Hans Joakim, Amare Leulseged, and Eric Cayeux. "Measurement of Drilling Fluid Rheology and Modeling of Thixotropic Behavior." Applied Rheology 29, no. 1 (2019): 1–11. http://dx.doi.org/10.1515/arh-2019-0001.

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Abstract Drilling fluids perform a number of important functions during a drilling operation, including that of lifting drilled cuttings to the surface and balancing formation pressures. Drilling fluids are usually designed to be structured fluids exhibiting shear thinning and yield stress behavior, and most drilling fluids also exhibit thixotropy. Accurate modeling of drilling fluid rheology is necessary for predicting friction pressure losses in the wellbore while circulating, the pump pressure needed to resume circulation after a static period, and how the fluid rheology evolves with time w

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16

Zhang, Shunxian, Chuanxi Luo, Zhiyong Huang, and Jian Li. "Study on Thixotropy of Mastic Asphalt Binder and Asphalt Mastic." Buildings 13, no. 9 (2023): 2380. http://dx.doi.org/10.3390/buildings13092380.

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In order to analyze the thixotropy of mastic asphalt concrete during the mixing process, the factors affecting the thixotropy of mastic asphalt binder and asphalt mastic are studied, and the measures to shorten the mixing time of mastic asphalt mixture are given. The dynamic viscosity of mastic asphalt binder and asphalt mastic with time and shear rate is obtained via the step frequency method, and the thixotropic constitutive models of mastic asphalt binder and asphalt mastic are constructed by structural dynamics model, exponential equation, and extended exponential equation respectvely. The

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17

Wang, Yilin, and Randy H. Ewoldt. "Thixotropy, antithixotropy, and viscoelasticity in hysteresis." Journal of Rheology 67, no. 6 (2023): 1199–219. http://dx.doi.org/10.1122/8.0000620.

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Thixotropy, antithixotropy, and viscoelasticity are three types of time-dependent dynamics that involve fundamentally different underlying physical processes. Here, we show that the three dynamics exhibit different signatures in hysteresis by examining the fingerprints of the simplest thixotropic kinetic model, a new antithixotropic model that we introduce here, and the Giesekus model. We start by showing that a consistent protocol to generate hysteresis loops is a discrete shear-rate controlled ramp that begins and ends at high shear rates, rather than at low shear rates. Using this protocol,

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18

Cheng, D. C. H. "Thixotropy." International Journal of Cosmetic Science 9, no. 4 (1987): 151–91. http://dx.doi.org/10.1111/j.1467-2494.1987.tb00472.x.

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19

Mewis, Jan, and Norman J. Wagner. "Thixotropy." Advances in Colloid and Interface Science 147-148 (March 2009): 214–27. http://dx.doi.org/10.1016/j.cis.2008.09.005.

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20

Alexandrou, Andreas N., Georgios C. Florides, and Georgios C. Georgiou. "Squeeze Flow of Semi-Solid Slurries." Solid State Phenomena 192-193 (October 2012): 263–68. http://dx.doi.org/10.4028/www.scientific.net/ssp.192-193.263.

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A standard method used to determine material properties of semi-solid slurries is the squeeze flow experiment in which a fixed amount of material is squeezed under constant force or velocity. The relation between the force and the displacement provides information about the rheology of the slurry. The thixotropy and the time response of the sample however is rarely, if ever, taken into consideration. In this work we study how thixotropy affects the flow characteristics and consequently the predicted material properties. We show that depending on the method of compression and the thixotropic co

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21

Sun, Zhiwen, Gangqiang Kong, Yang Zhou, Yang Shen, and Hanyu Xiao. "Thixotropy of a Transparent Clay Manufactured Using Carbopol to Simulate Marine Soil." Journal of Marine Science and Engineering 9, no. 7 (2021): 738. http://dx.doi.org/10.3390/jmse9070738.

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A transparent clay manufactured using Carbopol® UltrezTM 10 (simplified as U10) was introduced, and its manufacturing processes were briefly described. Both relative transparency (RT) and modulation transfer function (MTF) methods were used to quantify the optical character variation via soil thickness. The transparency of this new transparent clay was analyzed and compared with four traditional transparent materials. The thixotropic properties of this synthetic transparent clay were measured in detail through the laboratory vane test. An exponential function was used to describe the thixotrop

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22

Poluektova, V. A., and N. A. Shapovalov. "Thixotropic polymercement concrete: modeling, research, application." Perspektivnye Materialy 2 (2022): 5–16. http://dx.doi.org/10.30791/1028-978x-2022-2-5-16.

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The article describes methods currently used to measure the thixotropic properties of concrete. It represents the theoretical substantiation of the thixotropy process from the point of view of colloidal chemistry with the usage of the potential energy curve of interaction between particles. The choice of the mathematical model for the approximation of experimental results has been justified. The works deals with the simplest and most adequate thixotropy model of polymercement concrete (PC-concrete) for construction printing and self-compacting cast concrete (SCC). The Russel’s model is consist

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23

Spanjaards, Michelle, Gerrit Peters, Martien Hulsen, and Patrick Anderson. "Numerical Study of the Effect of Thixotropy on Extrudate Swell." Polymers 13, no. 24 (2021): 4383. http://dx.doi.org/10.3390/polym13244383.

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The extrusion of highly filled elastomers is widely used in the automotive industry. In this paper, we numerically study the effect of thixotropy on 2D planar extrudate swell for constant and fluctuating flow rates, as well as the effect of thixotropy on the swell behavior of a 3D rectangular extrudate for a constant flowrate. To this end, we used the Finite Element Method. The state of the network structure in the material is described using a kinetic equation for a structure parameter. Rate and stress-controlled models for this kinetic equation are compared. The effect of thixotropy on extru

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Zhou, Hao, Cai Chen, Feng Feng, Changsheng Zhou, Wenling Zhang, and Wei-Tao Wu. "Study of Thixotropic Characteristics of a Kerosene Gel Propellant by Bayesian Optimization." Gels 9, no. 1 (2022): 15. http://dx.doi.org/10.3390/gels9010015.

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The rheological behavior of gel propellants is crucial for their practical applications, especially in the rocket engine and ramjet fields. The thixotropic characteristics of gel propellants are an important component of their rheological properties and have a notable impact on their flow and injection process. However, most gel propellants contain rich, dynamic cross-linked network structures, which impart complex non-Newtonian fluid properties, and it is difficult to establish a unified mathematical model. In view of this, this study addresses the thixotropy of a prepared RP-3 kerosene gel a

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Gibala, D., K. Laohapisitpanich, D. Thomas, and G. R. Hamed. "Cure and Mechanical Behavior of Rubber Compounds Containing Ground Vulcanizates. Part II—Mooney Viscosity." Rubber Chemistry and Technology 69, no. 1 (1996): 115–19. http://dx.doi.org/10.5254/1.3538351.

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Abstract Mooney viscosities and thixotropic behavior have been determined for SBR melts containing carbon black and/or ground vulcanizate particles. A composition containing ambiently ground rubber has a higher viscosity than one with cryogenically ground rubber. This is attributed to occlusion of continuum rubber within the sponge-like, ambiently ground rubber; occlusion is not possible with the smooth, cryo-ground particles. Viscosity was independent of particle size. On an equal phr (weight) basis, the addition of N330 carbon black and cryo-ground rubber augment Mooney viscosity to a simila

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Žitný, Rudolf, Aleš Landfeld, Jan Skočilas, Jaromír Štancl, Vlastimil Flegl, and Milan Houška. "UNSTEADY FLOW OF THIXOTROPIC COLLAGEN SUBSTANCE IN PIPES." Acta Polytechnica 55, no. 5 (2015): 352. http://dx.doi.org/10.14311/ap.2015.55.0352.

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Unsteady flow of thixotropic liquid in pipes is solved by 1D and 2D numerical methods using the same constitutive equation — the only difference is in the radial diffusion of the structural parameter. Comparison shows that the neglected diffusion of structural parameter implicates a much stronger effect of thixotropy. The models are applied for analysis of the observed hysteresis of hydraulic characteristic of collagen.

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Jamali, Safa, and Gareth H. McKinley. "The Mnemosyne number and the rheology of remembrance." Journal of Rheology 66, no. 5 (2022): 1027–39. http://dx.doi.org/10.1122/8.0000432.

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The concept of a Deborah number is widely used in the study of viscoelastic materials to represent the ratio of a material relaxation time to the time scale of observation and to demarcate transitions between predominantly viscous or elastic material responses. However, this construct does not help quantify the importance of long transients and nonmonotonic stress jumps that are often observed in more complex time-varying systems. Many of these nonintuitive effects are lumped collectively under the term thixotropy; however, no proper nouns are associated with the key phenomena observed in such

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Bhattacharyya, Tulika, Alan R. Jacob, George Petekidis, and Yogesh M. Joshi. "On the nature of flow curve and categorization of thixotropic yield stress materials." Journal of Rheology 67, no. 2 (2023): 461–77. http://dx.doi.org/10.1122/8.0000558.

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Thixotropy is a phenomenon related to time dependent change in viscosity in the 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 strongly influence the steady state flow curve of the same. This study aims to understand the interrelation between thixotropy, yield stress, and their relation with the flow curve. In this regard, we study five thixotropic materials that sh

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Silva, I. A., I. D. S. Pereira, F. K. A. Sousa, R. R. Menezes, G. A. Neves, and H. C. Ferreira. "Thixotropic evaluation of bentonitic clay dispersions modified with nonionic surfactants for organic drilling fluids." Cerâmica 64, no. 371 (2018): 425–30. http://dx.doi.org/10.1590/0366-69132018643712392.

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Abstract The use of nonionic surfactants to modify the surface of bentonite is still quite restricted, although many advantages of that method can be found in the literature, like superior stability and low toxicity. On the other hand, problems involving the fluidity and viscosity of dispersions used in organic drilling fluids have become more and more challenging to colloid science. Therefore, the present study had the purpose of assessing the thixotropic behavior of dispersions of Brazilian bentonite organophilizated with nonionic surfactants for use in organic drilling fluids. Bentonite sam

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Tan, Ye Fa, Sheng Qiang Hao, Hong Wei Li, Hua Tan, Chun Hua Zhou, and Li Gao. "Effects of Thixotropic Agent and Storage Time on the Rheological Properties of Epoxy Resin." Applied Mechanics and Materials 217-219 (November 2012): 582–85. http://dx.doi.org/10.4028/www.scientific.net/amm.217-219.582.

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In order to modify the rheological properties of epoxy resin adhesive in casting moulding technology and improve its bonding quality, the effects of thixotropic agents of hydrophilic nano-silica, organic bentonite and the composite agent of the two thixotropic ones on the rheological properties of epoxy resin (E-44) were studied by the evaluation parameters of viscosity and thixotropic index in this paper. The variation regulation of rheological properties of epoxy resin (E-44) with different thixotropic agents as the storage time was also investigated. The results show that the two thixotropi

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Fatahian, Esmaeel, Naser Kordani, and Hossein Fatahian. "A REVIEW ON RHEOLOGY OF NON-NEWTONIAN PROPERTIES OF BLOOD." IIUM Engineering Journal 19, no. 1 (2018): 237–50. http://dx.doi.org/10.31436/iiumej.v19i1.826.

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Human blood is composed of red cells, white blood cells, and platelets in a fluid called plasma that contains organic and mineral salts and protein. The rheological characteristics of blood are determined by the properties of these combinations and their interaction with each other. The plasma is essentially a Newtonian fluid, but the blood as a whole behaves as a non-Newtonian fluid showing all signs of non-Newtonian rheology including deformation rate dependency, viscoelasticity, yield stress, and thixotropy. The purpose of this study is mainly a review based on past work on blood rheology,

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Woodcock, Leslie V. "Origins of Thixotropy." Physical Review Letters 54, no. 14 (1985): 1513–16. http://dx.doi.org/10.1103/physrevlett.54.1513.

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Barnes, Howard A. "Thixotropy—a review." Journal of Non-Newtonian Fluid Mechanics 70, no. 1-2 (1997): 1–33. http://dx.doi.org/10.1016/s0377-0257(97)00004-9.

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Shan, Wei Wei, Ju Fu Jiang, and Shou Jing Luo. "Microstructure and Stress Variation of Semi-Solid Magnesium Alloy during Isothermal Compression and Its Relationship to Thixotropy." Solid State Phenomena 116-117 (October 2006): 643–47. http://dx.doi.org/10.4028/www.scientific.net/ssp.116-117.643.

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Thixotropy is the most important characteristic of semi-solid materials, and it is decided by the variation of microstructure during action of handling. In this paper, for the sake of the industrial thixoforming and numerical simulation, microstructure and stress variation of semisolid magnesium alloys during isothermal compression is researched. Here, samples are heated to the desired temperature in the empty space with various holding times and compressed horizontally. Stress–strain curves during compression can be given directly by the experimental computer, and each of curves show a peak s

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Luo, Kai Yuan, Xian Fu Wei, Bei Qing Huang, and Mu Qun Yu. "Influence of Filler on the Rheological Properties of UV Curable Offset Ink." Applied Mechanics and Materials 200 (October 2012): 666–69. http://dx.doi.org/10.4028/www.scientific.net/amm.200.666.

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In order to investigate the influence of filler on the rheological properties of UV curable offset ink, ink samples with various varieties and contents of fillers were prepared, the flow curve, thixotropy, dynamic and viscoelastic properties have been tested, and the rheological properties UV offset ink samples with various varieties and contents of fillers have been discussed. The results indicated that: variety and content have great influence on the rheological properties of ink samples. Sample use SiO2 as filler has the highest viscosity, the largest thixotropy and G’; Sample use SiO2as fi

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Ma, Yuan, Mingming Liu, Tao Guo, and Tengwei Wu. "Experimental Study on Thixotropy of Temporarily Stored Sludge." Journal of Physics: Conference Series 2610, no. 1 (2023): 012013. http://dx.doi.org/10.1088/1742-6596/2610/1/012013.

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Abstract Aiming at the problems of strong viscosity and low transportation efficiency of temporary stored sludge in Laogang Shanghai, an experimental study on sludge thixotropy was carried out to study the changes of sludge viscosity with shear rate and standing time, the changes of shear stress with shear rate at different solid content, and the changes of sludge shear stress with time at constant shear rate at different solid content. On this basis, dynamic equilibrium rheological curves for different solid content were established, and numerical simulation techniques were used to form a mat

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37

Keung, W. C., Y. F. Lee, Wei Wei Shan, and Shou Jing Luo. "Thixotropic Strength and Thixotropic Criteria in Semi-Solid Processing." Solid State Phenomena 141-143 (July 2008): 319–23. http://dx.doi.org/10.4028/www.scientific.net/ssp.141-143.319.

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Thixotropy is essential to semi-solid processing, and because of it the semi-solid material is characterized by ‘shear shinning’. Here, thixotropic strength and thixotropic criteria in semi-solid processing are put forward based on related theories and experiments, and thixotropic mechanism and its influencing factors are also investigated. The results are as follows: 1) the term of thixotropic strength means that with constant shear rate at semi-solid temperature, the semi-solid body begins to flow when the shear stress reach a certain value. This value of shear stress is defined as the thixo

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Panda, Biranchi, Nisar Ahamed Noor Mohamed, Suvash Chandra Paul, GVP Bhagath Singh, Ming Jen Tan, and Branko Šavija. "The Effect of Material Fresh Properties and Process Parameters on Buildability and Interlayer Adhesion of 3D Printed Concrete." Materials 12, no. 13 (2019): 2149. http://dx.doi.org/10.3390/ma12132149.

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The advent of digital concrete fabrication calls for advancing our understanding of the interaction of 3D printing with material rheology and print parameters, in addition to developing new measurement and control techniques. Thixotropy is the main challenge associated with printable material, which offers high yield strength and low viscosity. The higher the thixotropy, the better the shape stability and the higher buildability. However, exceeding a minimum value of thixotropy can cause high extrusion pressure and poor interface bond strength if the printing parameters are not optimized to th

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39

OLEKSY, MARIUSZ, and HENRYK GALINA. "Characterization of thixotropic compositions of unsaturated polyester resins. The absolute thixotropy index." Polimery 44, no. 06 (1999): 430–32. http://dx.doi.org/10.14314/polimery.1999.430.

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Su, Zhenhua, Chunxiao Li, Guilin Jiang, Jiajie Li, Hao Lu, and Fenghui Guo. "Rheology and Thixotropy of Cement Pastes Containing Polyacrylamide." Geofluids 2022 (July 15, 2022): 1–10. http://dx.doi.org/10.1155/2022/1029984.

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In this article, the rheological and thixotropic properties of fresh cement pastes (fcps) with nonionic polyacrylamide (PAM) are investigated through the coaxial rotary method. The B-HB model is resorted to fit the shear stress versus shear rate diagram, from which the slurry plastic viscosity is particularly discussed. The results show that with the development of PAM, the plastic viscosity increases first, then decreases, and then increases again, exhibiting the “up-down-up” trend, which is consistent with the fcps fluidity. The adsorption, lubrication, and entanglement mechanisms of PAM are

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41

Huang, Ching-Rong, and Shiey-Shiun Horng. "Viscoelastic-thixotropy of blood." Clinical Hemorheology and Microcirculation 15, no. 1 (1995): 25–36. http://dx.doi.org/10.3233/ch-1995-15104.

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Agarwal, Mayank, Shweta Sharma, V. Shankar, and Yogesh M. Joshi. "Distinguishing thixotropy from viscoelasticity." Journal of Rheology 65, no. 4 (2021): 663–80. http://dx.doi.org/10.1122/8.0000262.

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Yang, Shaoli, and Knut H. Andersen. "Thixotropy of Marine Clays." Geotechnical Testing Journal 39, no. 2 (2015): 20150020. http://dx.doi.org/10.1520/gtj20150020.

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Cheng, D. C. H. "Characterisation of thixotropy revisited." Rheologica Acta 42, no. 4 (2003): 372–82. http://dx.doi.org/10.1007/s00397-002-0286-3.

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Cayeux, Eric, and Amare Leulseged. "The Effect of Thixotropy on Pressure Losses in a Pipe." Energies 13, no. 23 (2020): 6165. http://dx.doi.org/10.3390/en13236165.

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Drilling fluids are designed to be shear-thinning for limiting pressure losses when subjected to high bulk velocities and yet be sufficiently viscous to transport solid material under low bulk velocity conditions. They also form a gel when left at rest, to keep weighting materials and drill-cuttings in suspension. Because of this design, they also have a thixotropic behavior. As the shear history influences the shear properties of thixotropic fluids, the pressure losses experienced in a tube, after a change in diameter, are influenced over a much longer distance than just what would be expecte

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Zhao, Xulin, Haijun Wang, Guanghua Luo, et al. "Study on the Rheological and Thixotropic Properties of Fiber-Reinforced Cemented Paste Backfill Containing Blast Furnace Slag." Minerals 14, no. 10 (2024): 964. http://dx.doi.org/10.3390/min14100964.

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To investigate the mechanism of polypropylene fiber (PPF) on the rheological and thixotropic properties of cemented paste backfill containing mineral admixtures, the concept of water film thickness (WFT) was introduced. The packing density of the tailings-binder-PPF (TBP) system was measured in dry and wet conditions and the WFT was calculated accordingly. Additionally, the rheological parameters (yield stress, thixotropy, etc.) of the fiber-reinforced cemented paste backfill (FRCPB) were quantified. The results demonstrate that the wet packing test is a more appropriate method for measuring t

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Abu-Farsakh, Murad, Firouz Rosti, and Ahmad Souri. "Evaluating pile installation and subsequent thixotropic and consolidation effects on setup by numerical simulation for full-scale pile load tests." Canadian Geotechnical Journal 52, no. 11 (2015): 1734–46. http://dx.doi.org/10.1139/cgj-2014-0470.

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During pile installation, stresses and void ratios in the surrounding soils change significantly, creating large displacements, large strains, soil disturbance, and development of excess pore-water pressures. The surrounding disturbed soil tends to regain its strength with time due to both consolidation and thixotropic effects. In this paper, the pile installation process and subsequent consolidation, thixotropy, and load tests conducted at different times after end of driving (EOD) were modeled for test piles at the Bayou Laccassine Bridge site, Louisiana. In the finite element (FE) model, th

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Pramanik, Bapan. "Short Peptide-Based Smart Thixotropic Hydrogels †." Gels 8, no. 9 (2022): 569. http://dx.doi.org/10.3390/gels8090569.

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Thixotropy is a fascinating feature present in many gel systems that has garnered a lot of attention in the medical field in recent decades. When shear stress is applied, the gel transforms into sol and immediately returns to its original state when resting. The thixotropic nature of the hydrogel has inspired scientists to entrap and release enzymes, therapeutics, and other substances inside the human body, where the gel acts as a drug reservoir and can sustainably release therapeutics. Furthermore, thixotropic hydrogels have been widely used in various therapeutic applications, including drug

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Pérez-Jiménez, Félix, Ramon Botella, and Rodrigo Miró. "Damage and Thixotropy in Asphalt Mixture and Binder Fatigue Tests." Transportation Research Record: Journal of the Transportation Research Board 2293, no. 1 (2012): 8–17. http://dx.doi.org/10.3141/2293-02.

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Fatigue cracking is considered one of the main damage mechanisms in asphalt pavement design. Design methods use fatigue laws obtained by laboratory testing of the materials involved. Typically, these tests consist of subjecting the asphalt mixture to cyclic loading until failure occurs. However, failure is associated not with specimen fracture (which is unusual), but with a slight decrease in the mechanical properties of the material, usually in the complex modulus. As a consequence, it is important to differentiate between real damage to the material and changes in its viscoelastic behavior a

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Alatalo, Diana, and Fatemeh Hassanipour. "An Experimental Study on Human Milk Rheology: Behavior Changes from External Factors." Fluids 5, no. 2 (2020): 42. http://dx.doi.org/10.3390/fluids5020042.

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The influence of external factors, including temperature, storage, aging, time, and shear rate, on the general rheological behavior of raw human milk is investigated. Rotational and oscillatory experiments were performed. Human milk showed non-Newtonian, shear-thinning, thixotropic behavior with both yield and flow stresses. Storage and aging increased milk density and decreased viscosity. In general, increases in temperature lowered density and viscosity with periods of inconsistent behavior noted between 6–16 ∘ C and over 40 ∘ C. Non-homogeneous breakdown between the yield and flow stresses

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