Applied Rheology最新文献_第8页

Rheological Characterization of Yield-Stress Fluids with Brookfield Viscometer 屈服应力流体的Brookfield粘度计流变特性

IF 1.8 4区工程技术

Applied Rheology Pub Date : 2021-01-01 DOI: 10.1515/arh-2021-0001

A. Potanin, G. Marron

引用次数: 4

Stress effect & scale effect on shear properties of double saw-tooth rock joint surface 应力效应与尺度效应对双锯齿状岩石节理面剪切特性的影响

IF 1.8 4区工程技术

Applied Rheology Pub Date : 2021-01-01 DOI: 10.1515/arh-2020-0117

Zhan-you Luo, Mingyao Jiang, Linfei Mo, Baoping Zou, Man Huang

{"title":"Stress effect & scale effect on shear properties of double saw-tooth rock joint surface","authors":"Zhan-you Luo, Mingyao Jiang, Linfei Mo, Baoping Zou, Man Huang","doi":"10.1515/arh-2020-0117","DOIUrl":"https://doi.org/10.1515/arh-2020-0117","url":null,"abstract":"Abstract The shear properties of rock joint control the stability of rock and have an important impact on natural disasters such as landslides and debris flow. In order to study the stress effect and scale effect of shear properties of double saw-tooth rock joint, cement mortar is selected as similar material, a series of mix ratio tests are carried out, and the best mix ratio is obtained. Using rock joint integrated mold and joint panel produced by 3D printing technology, several groups of double saw-tooth joint specimens with different saw-tooth heights, saw-tooth widths, and saw-tooth spacings are made. Under multiple levels of normal stress, direct shear tests of different scale specimens are carried out by self-developed multifunctional rock-soil contact damage test system. Results show that the shear failure modes of double saw-tooth rock joint include couple effect of overriding and cutting off, and cutting off effect, which are mainly controlled by the rock joint morphology and normal stress. Peak shear strength increases with the increase of saw-tooth width and spacing, but the change with saw-tooth height is not obvious. Peak shear strength and peak friction angle of the double saw-tooth rock joint have significant characteristics of stress effect and scale effect.","PeriodicalId":50738,"journal":{"name":"Applied Rheology","volume":"31 1","pages":"39 - 49"},"PeriodicalIF":1.8,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47957177","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 2

How quarry waste limestone filler affects the rheological behavior of cement-based materials 采石场废石灰石填料如何影响水泥基材料的流变性能

IF 1.8 4区工程技术

Applied Rheology Pub Date : 2021-01-01 DOI: 10.1515/arh-2020-0118

S. Safiddine, Kamel Amokrane, F. Debieb, H. Soualhi, B. Benabed, E. Kadri

{"title":"How quarry waste limestone filler affects the rheological behavior of cement-based materials","authors":"S. Safiddine, Kamel Amokrane, F. Debieb, H. Soualhi, B. Benabed, E. Kadri","doi":"10.1515/arh-2020-0118","DOIUrl":"https://doi.org/10.1515/arh-2020-0118","url":null,"abstract":"Abstract The main objective of this work is to highlight experimentally the effect of quarry waste limestone fillers (LF) on the rheological properties of concrete. All mixtures were made with water-to-cement ratio (W/C) of 0.50. The method adopted based on the rheological behavior of concrete incorporating LF as a partial substitute for sand in multi-scale systems (concrete, mortar, grout and LF suspension). The replacement ratio of sand by LF ranged from 0% to 20% (by weight of sand) in concrete and mortar. Whereas, the addition of LF varied from 0% to 60% (by weight of cement) in cement grout. The rheological behavior of concrete and mortar was modeled by the Bingham model with sufficient precision. However, the cement grout shows a nonlinear behavior, which was modeled by the Herschel-Bulkley model. Results indicate that the use of LF has a significant effect on the superplasticizer (Sp) demand of concrete and mortar, for a given slump on one hand. On the other hand, an increase in yield stress, apparent viscosity and flow time of cement grout was obtained when LF is incorporated, which results in a loss of fluidity of the suspensions of LF.","PeriodicalId":50738,"journal":{"name":"Applied Rheology","volume":"31 1","pages":"63 - 75"},"PeriodicalIF":1.8,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44901163","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 17

Experimental determination and modeling of flow curves of xanthan gum solutions over a large range of shear rates 黄原胶溶液在大剪切速率范围内流动曲线的实验测定和建模

IF 1.8 4区工程技术

Applied Rheology Pub Date : 2021-01-01 DOI: 10.1515/arh-2020-0116

Julian Sepúlveda, A. Montillet, D. D. Valle, Thanina Amiar, H. Ranchon, C. Loisel, A. Riaublanc

{"title":"Experimental determination and modeling of flow curves of xanthan gum solutions over a large range of shear rates","authors":"Julian Sepúlveda, A. Montillet, D. D. Valle, Thanina Amiar, H. Ranchon, C. Loisel, A. Riaublanc","doi":"10.1515/arh-2020-0116","DOIUrl":"https://doi.org/10.1515/arh-2020-0116","url":null,"abstract":"Abstract The viscosities of solutions formulated with xanthan gum and xanthan gum with whey protein isolates are experimentally characterized and modeled over a wide range of shear rates [10−3 to 105 s−1]. As shown by numerous studies [1, 2], the generation of vortices in the cone-plate geometry is making viscosity measurements beyond a certain shear rate unreliable. In the present work, an innovative technique, based on microfluidics and developed by the company Formulaction, has been employed to extend to high shear rates, the viscosity flow curve obtained with a rotational rheometer. The main highlights of this study are firstly, to propose a scaling law for the inertial transition in the cone-plate geometry for different diameters and angles through the determination of the maximum shear rate at which one can expect a true viscosity value. Secondly, the high shear rate measurements allow the determination of the second Newtonian plateau for these solutions thanks to the Williams-Carreau model. An attempt for the second plateau modeling is proposed following the concept of an intrinsic viscosity in the high shear equilibrium. In the same way, other fitted parameters from the Williams-Carreau law are modeled as a function of the polymer concentration. This procedure allows to provide a predictive model for the rheological behavior of xanthan gum-based solutions used in high shear processes like high pressure homogenization, emulsification, foaming, microfluidics, etc in food, pharmaceutical or cosmetics applications.","PeriodicalId":50738,"journal":{"name":"Applied Rheology","volume":"31 1","pages":"24 - 38"},"PeriodicalIF":1.8,"publicationDate":"2021-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/arh-2020-0116","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41366986","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 6

Polymer Viscoelasticity 聚合物的粘弹性

IF 1.8 4区工程技术

Applied Rheology Pub Date : 2020-04-17 DOI: 10.1515/arh-2005-0035

T. Schweizer

引用次数: 13

Effect of Solid Additives on the Rheological Property of Nitroglycerin Plasticized Nitrocellulose 固体添加剂对硝酸甘油增塑硝基纤维素流变性能的影响

IF 1.8 4区工程技术

Applied Rheology Pub Date : 2020-01-01 DOI: 10.1515/arh-2020-0002

Le Qi, Zhongliang Ma, Jiahao Liang, Zhongliang Xiao

{"title":"Effect of Solid Additives on the Rheological Property of Nitroglycerin Plasticized Nitrocellulose","authors":"Le Qi, Zhongliang Ma, Jiahao Liang, Zhongliang Xiao","doi":"10.1515/arh-2020-0002","DOIUrl":"https://doi.org/10.1515/arh-2020-0002","url":null,"abstract":"Abstract The rheological properties of energetic materials comprising nitroglycerin plasticized nitrocellulose were studied using rheological tests in a parallel plate rheometer. The Carreau-Yasuda equation was applied to calculate the zero-shear viscosity, and the dependence of solid additives, temperature and solvent content on zero-shear viscosity was developed. One can study flow characteristics of the energetic materials by observing the zero-shear viscosity instead of the effect of solid additives, temperature and solvent content. Additionally, the relationship between zero-shear viscosity and additives concentration was studied. The Kissinger-Akahira-Sunose (KAS) method was used to obtain the viscous flow activation energy, and the equation to describe the relationship between solid additives concentration and viscous flow activation energy was represented. The Zero-Shear Viscosity (ZSV) test showed that temperature was the predominant effect on the ZSV value at low solvent content, as the concentration of solid additives increased, the ZSV value decreased at low solvent content but increased at high one, however, there is an opposite trend when graphene concentration is above 0.1%. The viscous flow activation energy showed different changing trends with solid concentration that increased at different solvent content. The master curves were obtained by Time-Temperature Equivalence Principle, the viscosity prediction model has been established and showed a good agreement with the experimental data, compared with the test results, the viscosity prediction model is more accurate at low temperature (15°C-25°C). The obtained knowledge of the different equations will form a contribution to the research on extrusion process of this energetic material containing Cyclotrimethylenetrinitramine (RDX) and graphene, and the results obtained by this research have certain practical significance of the extrusion process for this energetic material.","PeriodicalId":50738,"journal":{"name":"Applied Rheology","volume":"30 1","pages":"14 - 26"},"PeriodicalIF":1.8,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/arh-2020-0002","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43943461","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Rheological Enhancement of Artificial Sputum Medium 人工痰液介质的流变增强

IF 1.8 4区工程技术

Applied Rheology Pub Date : 2020-01-01 DOI: 10.1515/arh-2020-0100

M. Tan, Yating Mao, T. Walker

{"title":"Rheological Enhancement of Artificial Sputum Medium","authors":"M. Tan, Yating Mao, T. Walker","doi":"10.1515/arh-2020-0100","DOIUrl":"https://doi.org/10.1515/arh-2020-0100","url":null,"abstract":"Abstract This investigation proposes a synthetic biofluid, artificial sputum medium (ASM) and xanthan gum (XG), that mimics the mucus from a patient with cystic fibrosis, and investigates the rheological properties both macroscopically and microscopically. Macroscopic rheological characterization cannot address the heterogeneity or the behavior of particle transport inside the mucus. Microscopic rheology enables the characterization of the microenvironment by using microparticles as probes. The addition of XG to ASM provides a tunable parameter that enables the mechanical properties to be consistent with real mucus. Particles that were suspended in a media of ASM with XG displayed a subdiffusive behavior at short timescales with a diffusive exponent that decreases with an increase in concentration of XG. At long timescales, particles that were suspended in ASM+XG with a concentration of XG of 0.1% to 0.4% displayed diffusive behavior. While in more concentrated samples (0.5% and 1.0%), the particles were constrained inside local elastic “cages”. The microscopic moduli that were calculated showed consistently lower moduli than rotational rheometry. This discrepancy suggests that the solutions of XG have a hierarchical structure that better represents the weakly associated microstructure of mucus that is found in real sputum.","PeriodicalId":50738,"journal":{"name":"Applied Rheology","volume":"30 1","pages":"27 - 38"},"PeriodicalIF":1.8,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/arh-2020-0100","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45000108","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 5

Automated Characterization of Non-Newtonian Fluids Using Laboratory Setup 使用实验室装置自动表征非牛顿流体

IF 1.8 4区工程技术

Applied Rheology Pub Date : 2020-01-01 DOI: 10.1515/arh-2020-0101

D. Sui, Juan Carlos Martinez Vidaur

引用次数: 3

Analysis of the complex rheological properties of highly concentrated proteins with a closed cavity rheometer 用闭腔流变仪分析高浓度蛋白质的复杂流变特性

IF 1.8 4区工程技术

Applied Rheology Pub Date : 2020-01-01 DOI: 10.1515/arh-2020-0107

P. Wittek, Nicole Zeiler, H. Karbstein, M. Emin

{"title":"Analysis of the complex rheological properties of highly concentrated proteins with a closed cavity rheometer","authors":"P. Wittek, Nicole Zeiler, H. Karbstein, M. Emin","doi":"10.1515/arh-2020-0107","DOIUrl":"https://doi.org/10.1515/arh-2020-0107","url":null,"abstract":"Abstract Highly concentrated biopolymers are used in food extrusion processing. It is well known that rheo-logical properties of biopolymers influence considerably both process conditions and product properties. Therefore, characterization of rheological properties under extrusion-relevant conditions is crucial to process and product design. Since conventional rheological methods are still lacking for this purpose, a novel approach is presented. A closed cavity rheometer known in the rubber industry was used to systematically characterize a highly concentrated soy protein, a very relevant protein in extruded meat analogues. Rheological properties were first determined and discussed in the linear viscoelastic range (SAOS). Rheo-logical analysis was then carried out in the non-linear viscoelastic range (LAOS), as high deformations in extrusion demand for measurements at process-relevant high strains. The protein showed gel behavior in the linear range, while liquid behavior was observed in the nonlinear range. An expected increase in elasticity through addition of methylcellulose was detected. The measurements in the non-linear range reveal significant changes of material behavior with increasing strain. As another tool for rheological characterization, a stress relaxation test was carried out which confirmed the increase of elastic behavior after methylcellulose addition.","PeriodicalId":50738,"journal":{"name":"Applied Rheology","volume":"30 1","pages":"64 - 76"},"PeriodicalIF":1.8,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/arh-2020-0107","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45557364","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 22

Wheat Bread with Grape Seeds Micropowder: Impact on Dough Rheology and Bread Properties 葡萄籽微粉小麦面包对面团流变学和面包特性的影响

IF 1.8 4区工程技术

Applied Rheology Pub Date : 2020-01-01 DOI: 10.1515/arh-2020-0112

V. Valková, H. Ďúranová, J. Štefániková, M. Miškeje, M. Tokár, Lucia Gabríny, P. Kowalczewski, M. Kačániová

{"title":"Wheat Bread with Grape Seeds Micropowder: Impact on Dough Rheology and Bread Properties","authors":"V. Valková, H. Ďúranová, J. Štefániková, M. Miškeje, M. Tokár, Lucia Gabríny, P. Kowalczewski, M. Kačániová","doi":"10.1515/arh-2020-0112","DOIUrl":"https://doi.org/10.1515/arh-2020-0112","url":null,"abstract":"Abstract The current study was designed to enhance the functionality of white bread by replacement of wheat flour with different levels (1%, 2%, 5%, and 8%) of grape seeds micropowder (GSMP) with nanosized particles (10 µm). Chemical composition of GSMP, volume and sensory attributes, evaluated with the panel of evaluators and an electronic nose (e-nose) and an electronic eye (e-eye) were investigated in the tested breads. It has been found out that GSMP contained appreciable amounts of flavonoids including catechin, epicatechin, gallic acid and minerals especially, Ca, K and Mg. The data from rheological analysis showed that the addition of GSMP (mainly at 5% and 8% levels) to the wheat flour had a positive effect on dough manifesting with rheology by increased dough stability. The volume of the experimental breads (above 1% concentration) was demonstrably declined (P < 0.0001) in comparison with the control bread. Sensory rating revealed that the bread fortified with 1% GSMP was judged by the consumer panelists as the most acceptable with the highest scores for all quality attributes which was also confirmed by the data of e-nose and e-eye. Our results suggest for the first time that 1% GSMP addition appears to be a promising functional ingredient to improve bread with required qualitative and sensory properties.","PeriodicalId":50738,"journal":{"name":"Applied Rheology","volume":"30 1","pages":"138 - 150"},"PeriodicalIF":1.8,"publicationDate":"2020-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1515/arh-2020-0112","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48455708","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 9