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Master curves construction for viscoelastic functions of bituminous materials Appl. Rheol. (IF 1.8) Pub Date : 2024-03-14 Giovanni Polacco, Sara Filippi
The performance of bituminous materials is often evaluated using rheological properties measured within the linear viscoelastic region. If there is a univocal temperature dependence of all the relaxation times, data obtained in different operating conditions can be translated onto a logarithmic scale where they partially overlap and merge into a single master curve. This is the well-known time–temperature
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Study on precursor information and disaster mechanism of sudden change of seepage in mining rock mass Appl. Rheol. (IF 1.8) Pub Date : 2024-02-28 Yijun Gao, Zongjie Zhu, Zhiming Liu, Gang Huang
Changes in the stress field and seepage field of mining unloading are one of the important causes of deformation and destabilization of the rock body of the bottom slab. With the increase of mining intensity and depth, the disaster of water influx on the bottom plate under the dual action of mining unloading and pressurized water has become one of the main problems restricting the efficient and safe
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Bearing behavior of pile foundation in karst region: Physical model test and finite element analysis Appl. Rheol. (IF 1.8) Pub Date : 2024-02-23 Minghong Sheng, Fangqing Lu, Nan Jiang, Panpan Guo, Xian Li, Ran An, Yixian Wang
The presence of karst formations significantly impacts the load-bearing capacity of pile foundations in karst geological environments, posing a challenge to their design. This study investigated the bearing characteristics of karst pile foundations using the physical model test and numerical analysis. First, the influence of cave height and span on the bearing capacity of pile foundations is examined
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Study on stress distribution and extrusion load threshold of compressed filled rock joints Appl. Rheol. (IF 1.8) Pub Date : 2024-01-24 Pengpeng Wang, Shigui Du, Gan Li, Zhanyou Luo
The distribution of stress and the normal extrusion load threshold in weak interlayer are crucial for direct shear test of filled rock joints, but there is a lack of theoretical research in this area. First, an analytical solution for stress distribution was derived using a semi-inverse method. Then, it is compared by the numerical simulation method. Finally, the influence of the width and thickness
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Experimental study of uniaxial compressive mechanical properties of rough jointed rock masses based on 3D printing Appl. Rheol. (IF 1.8) Pub Date : 2024-01-04 Pu Yuan, Aobo Li, Changning Chen, Xuefeng Lu
Roughness and inclination are important factors affecting the strength and deformation properties of jointed rock masses. Serrated joint specimens with varying joint roughness coefficient (JRC) and inclination angle were manufactured by 3D printing technique and cement mortar material. Then, uniaxial compression tests were performed for serrated joint specimens. The results show that when inclination
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Strength characteristics and damage constitutive model of sandstone under hydro-mechanical coupling Appl. Rheol. (IF 1.8) Pub Date : 2023-12-14 Qiang Liu, Yanlin Zhao, Jian Liao, Tao Tan, Xiaguang Wang, Yang Li, Zhe Tan
To study the mechanical properties of saturated sandstone, experiments were conducted under hydro-mechanical coupling on saturated sandstone. A damage constitutive model was established to describe the response of saturated sandstone under pore pressure, and its validity was verified using the results of the triaxial tests. The results indicate that the peak strength (σ p), effective peak strength
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CT measurement of damage characteristics of meso-structure of freeze-thawed granite in cold regions and preliminary exploration of its mechanical behavior during a single freeze-thaw process Appl. Rheol. (IF 1.8) Pub Date : 2023-12-09 Chunyang Zhang, Tao Tan, Bo Ke, Bingde Ma, Bibo Dai, Zhiheng Fang, Ercheng Zhao
The freeze-thaw (FT) damage characteristics of granite after different FT cycles were studied using computed tomography (CT) images. The three-dimensional (3D) volume numbers in the image were extracted to obtain the 3D pore structure of representative volume elements (RVEs) of granite under different FT cycles. The CT images of granite after 80 FT cycles were selected to draw reference lines for quantitative
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Monitoring and numerical simulation analysis of a pit-in-pit excavation of the first branch line of Lanzhou Metro Appl. Rheol. (IF 1.8) Pub Date : 2023-11-09 Hui Tao, Shuaihua Ye, Shicheng Zhang
Based on the pit excavation project in a station of Lanzhou Metro, the horizontal displacement of bored piles, the ground settlement around the foundation pit, and the supporting axial force in the foundation pit were tested on site. The changing rules and influencing factors of horizontal displacement of external and internal bracing piles during foundation pit construction are analyzed. Comparing
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Development of fiber compound foaming agent and experimental study on application performance of foamed lightweight soil Appl. Rheol. (IF 1.8) Pub Date : 2023-10-13 Youqiang Qiu, Yijun Wang, Yang Liu, Liujun Zhang, Yashao Chen, Chenyang Li, Tong Wu, Chaoxiang Wang
In order to prepare high-performance foaming agent for field-cast foamed lightweight soil, the fiber compound foaming agent was prepared by the combination of anionic surfactant sodium dodecyl sulfate (SDS) and nonionic surfactant alkyl polyglucoside (APG), supplemented by hydrolyzed polyacryamide (HPAM) as the foam stabilizer. The effects of the mass ratio of surfactant and the content of foam stabilizer
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Thickened fluids classification based on the rheological and tribological characteristics Appl. Rheol. (IF 1.8) Pub Date : 2023-10-11 Parisa Poursani, Seyed M. A. Razavi
In this study, a new scheme for the classification of thickened-fluids based on xanthan gum-cress seed gum was developed. For this purpose, the mechanical characteristics, including steady shear, small amplitude oscillatory shear, large amplitude oscillatory shear, and tribological parameters, were measured and classified into four clusters using the K-means approach. The findings showed that the first
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The ductility performance of concrete using glass fiber mesh in beam specimens Appl. Rheol. (IF 1.8) Pub Date : 2023-10-10 Aylin Özodabaş
It is known that concrete with high ductility reduces fatalities because it absorbs more energy during an earthquake. The aim of this study is to increase the ductility of concrete by using glass fiber mesh (GFM) left over from the use of plaster in structures and to support sustainability by reusing waste materials in concrete. Another aim is to contribute to the economy by using waste fibers instead
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Deformation rules of deep foundation pit of a subway station in Lanzhou collapsible loess stratum Appl. Rheol. (IF 1.8) Pub Date : 2023-10-10 Yaxiong Liang, Shuaihua Ye, Yiguan Huang
According to the deep foundation pit project of Xiaoxihu station on Lanzhou subway Line 1, the three-dimensional finite-element model of the half-cover excavation method of retaining structure is established to simulate the construction of the excavation of the foundation pit. This article analyzes the settling of the surrounding surface, the horizontal displacement and vertical displacement of the
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Elongational flow mixing: A novel innovative approach to elaborate high-performance SBR-based elastomer compounds Appl. Rheol. (IF 1.8) Pub Date : 2023-10-04 Chloé Faverjon, Mohamed Yousfi, Caroline Parajua-sejil, Vivien Truchot, Jannick Duchet-Rumeau
A dominant extensional flow mixing device (Reactor/Elongational Flow MiXer; RMX) was used to prepare styrene-butadiene rubber (SBR)/silica nanocomposites with high physical performances. First, the processing parameters such as the temperature, number of mixing cycles, and sequenced mixing protocol have been optimized. Thereafter, the morphological structure of different compounds was probed using
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Research and optimization of tunnel construction scheme for super-large span high-speed railway tunnel in poor tuff strata Appl. Rheol. (IF 1.8) Pub Date : 2023-09-13 Jianfei Ma, Shaohui He, Xiabing Liu, Jiaxin He
The rapid traffic developments create demands for shallow four-line high-speed railway tunnels in weak soils, while construction technologies of such tunnels have yet to be reported. In this article, the construction schemes for a shallow four-line high-speed railway tunnel with a span of 26.3 m in weak tuff strata are investigated by numerical analysis and in-situ tests. First, 20 construction schemes
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Creep behavior of layered salt rock under triaxial loading and unloading cycles Appl. Rheol. (IF 1.8) Pub Date : 2023-09-12 Yanlin Zhao, Xiaguang Wang, Wenyu Tang, Yang Li, Hang Lin, Yixian Wang, Lianyang Zhang
This paper presents an extensive laboratory investigation of layered salt rocks under triaxial loading and unloading cycles aiming to better understand their viscoelastic plasticity strain characteristics. Specifically, creep curves were obtained from the triaxial loading and unloading tests and analyzed using the Burgers model. The microstructure of the layered salt rocks before and after the creep
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Numerical analysis of the impact of excavation for undercrossing Yellow River tunnel on adjacent bridge foundations Appl. Rheol. (IF 1.8) Pub Date : 2023-09-07 Liangliang Xin, Shuaihua Ye, Dengqun Wang
Taking the twin-tunnel shield tunnel of the urban rail transit in Lanzhou City as an example, this article applies the hardening soil small criterion and utilizes finite element software to simulate the excavation process of the undercrossing Yellow River tunnel. The analysis focuses on the deformation effects and axial force variations of nearby bridge foundations in three directions: vertical to
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A study on the fractal and permeability characteristics of coal-based porous graphite for filtration and impregnation Appl. Rheol. (IF 1.8) Pub Date : 2023-07-14 Qili Wang, Jing Wang, Shuwei Yang, Jiarui Sun
In order to distinguish the differences in the heterogeneous fractal structure of porous graphite adopted in the filtration and impregnation, the fractal dimensions (FDs) were obtained by the mercury intrusion porosimetry (MIP) to calculate the volumetric FDs of ten graphite samples, following the fractal theory. The FD expression of the tortuosity along with all the parameters from the MIP test was
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Study on the risk of seepage field of Qiantang River underground space excavated in water-rich rheological rock area Appl. Rheol. (IF 1.8) Pub Date : 2023-07-05 Tianjiao Zhang
With the rapid development of underwater space construction, the theoretical research is at the initial stage. At present, the theoretical research methods mainly include mirror image method and conformal transformation method. At present, almost all the research objects in analytical research are homogeneous soil layers. However, in practical engineering, soil layers are often distributed in layers
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Semi-analytical method for solving stresses in slope under general loading conditions Appl. Rheol. (IF 1.8) Pub Date : 2023-06-14 Ping Wu, Xuejun Sun, Dayong Zhu Zhu
Assessing the stress distribution within the slope in geotechnical engineering is critical. Despite the widely available numerical methods, no analytical solutions are available for determining the stress distribution within a slope under general loading conditions. This study presents a method of analytically approximating elastic stresses within a slope of arbitrary inclination subject to general
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An experimental investigation into the radiation-shielding performance of newly developed polyester containing recycled waste marble and bismuth oxide Appl. Rheol. (IF 1.8) Pub Date : 2023-05-26 Aljawhara H. Almuqrin, Sabina Yasmin, Mohammad Ibrahim Abualsayed, Mohamed Elsafi
To obtain better radiation shielding, a new polyester has been made by the combination of 40 wt% of polyester and 30 wt% of fine waste marble mixed along with PbO (30–0) wt% and Bi2O3 (0–30) wt%. A few significant shielding parameters such as linear attenuation coefficient (LAC), half-value layer (HVL), mean free path (MFP), and effective atomic number (Z eff) have been measured experimentally using
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Mechanical behavior of a new similar material for weathered limestone in karst area: An experimental investigation Appl. Rheol. (IF 1.8) Pub Date : 2023-05-25 Nan Jiang, Panpan Guo, Hui Zhang, Fangqing Lu, Jian Liu
Considering the important effect of mineral composition, this article deduces the similarity criterion based on the dimensional method. Similar materials suitable for tuffs with different degrees of weathering in karst areas are made. By virtue of the orthogonal experiment, the mechanical behaviors of the similar materials with various mix proportions are systematically investigated. It provides an
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Tailoring a symmetry for material properties of tellurite glasses through tungsten(vi) oxide addition: Mechanical properties and gamma-ray transmissions properties Appl. Rheol. (IF 1.8) Pub Date : 2023-05-17 Ghada ALMisned, Ziad Y. Khattari, Elaf Rabaa, Yasser S. Rammah, Duygu Sen Baykal, Gokhan Kilic, Hesham M. H. Zakaly, Antoaneta Ene, Huseyin Ozan Tekin
We report a correlation outcome for mechanical and gamma-ray transmission properties of tellurite glasses by increasing tungsten(vi) oxide concentration in glass structure. The mechanical properties as well as Poisson’s ratio (σ) of the studied glasses are estimated by applying Makishima–Mackenzie model. Gamma-ray attenuation properties using various fundamental parameters are determined in 0.015–15
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Research on large deformation control technology of highly weathered carbonaceous slate tunnel Appl. Rheol. (IF 1.8) Pub Date : 2023-05-11 Guangyao Cui, Qinlong Chen
In order to further explore the large deformation control technology of high ground stress soft rock tunnel, this study takes the highly weathered carbonaceous shale section of Muzhailing tunnel as the research background, the large deformation control effect of scheme 1 “three-step method” and scheme 2 “pilot tunnel expansion method” are compared and analysed by field test and numerical simulation
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Application of the ramp test from a closed cavity rheometer to obtain the steady-state shear viscosity η(γ̇) Appl. Rheol. (IF 1.8) Pub Date : 2023-05-05 Felix Ellwanger, Christos K. Georgantopoulos, Heike P. Karbstein, Manfred Wilhelm, M. Azad Emin
The steady-state shear viscosity η ( γ ̇ ) \eta (\dot{\gamma }) is required in controlling processing parameters for the extrusion processing of polymer melts. A new method, the so-called ramp test, is investigated in this study to obtain the steady-state shear viscosity with a closed cavity rheometer (CCR). To verify the method and the accuracy of the CCR data, three commercial polyolefin polymers
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Application of isolation technology in shallow super-large comprehensive pipe galleries in seismically vulnerable areas with weak soils Appl. Rheol. (IF 1.8) Pub Date : 2023-04-18 Jianfei Ma, Guangyao Cui, Shaohui He, Xiabing Liu
Shallow urban tunnels with super-large sections in weak soils may experience much more devastating seismic hazards than conventionally deep tunnels in seismically vulnerable areas. This study investigates the seismic response and isolation technology for the largest comprehensive urban pipe gallery in the Xiong’an New Area, Hebei Province, China, using seismic simulation. First, the engineering background
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An efficient method for computing slope reliability calculation based on rigorous limit equilibrium Appl. Rheol. (IF 1.8) Pub Date : 2023-04-13 Juxiang Chen, Dayong Zhu, Yalin Zhu
Traditional rigorous limit equilibrium methods satisfy all equilibrium conditions and usually have high accuracy, however, which are less efficient for slope reliability analysis. The main reason is that the limit state functions are highly nonlinear implicit functions of safety factor. Complex numerical iterations are required, which may sometimes lead to computational convergence problems. A new
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A method of safety monitoring and measurement of overall frost heaving pressure of tunnel in seasonal frozen area Appl. Rheol. (IF 1.8) Pub Date : 2023-04-13 Guangyao Cui, Yong Xiong
Antifreeze design, scientific operation, and maintenance of tunnels with broken surrounding rock in seasonal frozen areas are key factors that affect the safety of tunnel. According to a freezing damage treatment project, theoretical analysis, field monitoring, and numerical simulation are used to study the calculation method of the overall frost-heaving pressure of a tunnel with broken surrounding
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Analysis of complex fluid discharge from consumer dispensing bottles using rheology and flow visualization Appl. Rheol. (IF 1.8) Pub Date : 2023-04-02 Baran Teoman, Andrei Potanin, Piero M. Armenante
Complex fluids, such as gels, shampoos, and creams, are ubiquitous in the consumer product industry. However, little information is available on their discharge from consumer packaging, often resulting in a considerable heel, i.e., the residual waste material after the discharge process is complete. Here, we used rheological analysis and particle image velocimetry (PIV) to investigate the discharge
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Transient particle tracking microrheology of plasma coagulation via the intrinsic pathway Appl. Rheol. (IF 1.8) Pub Date : 2023-04-02 Yating Mao, Mingyang Tan, Tia C. L. Kohs, Joanna L. Sylman, Anh T. P. Ngo, Cristina Puy, Owen J. T. McCarty, Travis W. Walker
The maintenance of hemostasis to ensure vascular integrity is dependent upon the rapid conversion of zymogen species of the coagulation cascade to their enzymatically active forms. This process culminates in the generation of the serine protease thrombin and polymerization of fibrin to prevent vascular leak at sites of endothelial cell injury or loss of cellular junctions. Thrombin generation can be
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An effective method for real-time estimation of slope stability with numerical back analysis based on particle swarm optimization Appl. Rheol. (IF 1.8) Pub Date : 2023-03-28 Jiaqiang Zou, Hao Chen, Yu Jiang, Wei Zhang, Aihua Liu
The purpose of this article is to provide an effective approach to evaluate slope stability in real-time in a reservoir area, which is significant for carrying out risk management for landslide disaster prevention in various engineering practices. A comprehensive idea for stability estimation of bank slope under the influence of rainfall or the reservoir water level is presented in this work. Slope
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Synthesis and characterization of a new complex based on antibiotic: Zirconium complex Appl. Rheol. (IF 1.8) Pub Date : 2023-03-24 Sabrina Benmebarek, Sabiha Anas Boussaa, Imad Eddine Benmebarek, M’hamed Boudraa, Hocine Merazig
It is well known that sulfonamide derivatives, through exchange of different functional groups without modification of the –S(O)2N(H)– function, can exhibit a wide variety of pharmacological activities. In addition, some metal complexes of these ligands have been prepared to promote rapid healing of burns in humans and animals, for example, the complex of Zn(ii) sulfadiazine. Their effectiveness does
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Exergy–energy analysis for a feasibility trigeneration system at Kocaeli University Umuttepe Campus Appl. Rheol. (IF 1.8) Pub Date : 2023-03-24 Ebru Kolay Kadıoğlu, Meral Altınay
In this study, the feasibility of the trigeneration system, which is one of the on-site energy production methods, was determined for Kocaeli University Umuttepe Campus, exergy and energy analyses were made for each point of the system and exergy destruction in the lines was found. The key point of the gains, losses, and efficiency analyses in the lines are presented with engineering solutions and
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Correlation analysis of physical and mechanical parameters of inland fluvial-lacustrine soft soil based on different survey techniques Appl. Rheol. (IF 1.8) Pub Date : 2023-03-23 Liujun Zhang, Youqiang Qiu, Tong Wu, Wei Zhang
Based on the collected soil property index test data of more than 2,500 groups of inland fluvial-lacustrine soft soil, the correlation of physical and mechanical parameters of this soft soil was systematically analyzed. The results show that the physical indexes of inland fluvial-lacustrine soft soil are close to that of marine soft soil, while its mechanical indexes are higher. However, the variation
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Development of an adaptive coaxial concrete rheometer and rheological characterisation of fresh concrete Appl. Rheol. (IF 1.8) Pub Date : 2023-03-02 Sebastian Josch, Steffen Jesinghausen, Hans-Joachim Schmid
The accessibility to rheological parameters for concrete is becoming more and more relevant. This is mainly related to the constantly emerging challenges, such as not only the development of high-strength concretes is progressing very fast but also the simulation of the flow behaviour is of high importance. The main problem, however, is that the rheological characterisation of fresh concrete is not
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Seismic response and damage mechanism of tunnel lining in sensitive environment of soft rock stratum Appl. Rheol. (IF 1.8) Pub Date : 2023-03-02 Guangchen Sun, Wenchen Fan, Helin Fu, Shan He, Hao Shen, Shuiping Yin, Peng Yin, Xueyi Wang
In order to investigate the dynamic response characteristics and damage mechanism of the tunnel lining at the tunnel portal in the bridge–tunnel overlapping section in soft rock strata, a physical model with the scale ratio of 1:50 was made based on the similarity theory for shaking table tests. The acceleration and strain results of the tunnel lining under EL Centro seismic waves with different acceleration
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Ultimate strength of hyper-ellipse flanged-perforated plates under uniaxial compression loading Appl. Rheol. (IF 1.8) Pub Date : 2023-02-24 Wang Wensheng, Ning Huijun, Shang Xin
In order to address the impact of the perforated parameters on the mechanical properties of the plate, the ultimate strength of hyper-ellipse flanged-perforated plates under uniaxial compression stress is numerically investigated in this article. The four edges of the flanged-perforated plate are only supported in the out-of-plane direction while the plate is exposed to uniaxial compressive loads.
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Seismic hazard analysis by neo-deterministic seismic hazard analysis approach (NDSHA) for Kosovo Appl. Rheol. (IF 1.8) Pub Date : 2023-02-14 Nazmi Hasi, Latif Hasi, Naim Syla, Arbër Zeqiraj
It is favorable to re-evaluate the seismic hazard for a given territory, since in the course of time new methods are developed and new data are gathered that can enable more sophisticated (physically sound) and reliable assessment of the seismic hazard. Therefore, it is mandatory to re-evaluate the seismic hazard for Kosovo, considering the seismic sources in Kosovo. The data of this article influence
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Determination of the velocity of seismic waves for the location of seismic station of Zatriq, Kosovo Appl. Rheol. (IF 1.8) Pub Date : 2023-02-13 Nazmi Hasi, Latif Hasi, Naim Syla
Seismological investigations are of a particular importance for the behavior of engineering structures and other structures of interest for the society under earthquake effects. This refers not only to the location of the structures themselves but also to their wider surrounding. In this context, it is important to determine the speed of seismic waves to define the possible location for the construction
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Exergy analyses of two and three stage cryogenic cycles Appl. Rheol. (IF 1.8) Pub Date : 2023-02-10 Musa Atasbak, Arzu Keven, Rabi Karaali
Cryogenics has an important influence on industry and science. In this study, optimum working conditions are obtained by applying exergy analysis and local optimization methods to two- and three-stage vapor compression cascade cryogenic cycle. The first and second laws of thermodynamics, exergy analysis, and local optimization methods are applied to the two- and three-stage cascade cryogenic cycle
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Optimization of lead-free CsSnI3-based perovskite solar cell structure Appl. Rheol. (IF 1.8) Pub Date : 2023-02-09 Hayat Arbouz
Perovskites are considered the most promising material for the latest generation of solar cells. However, due to the presence of lead in their composition, the development of non-toxic Perovskite cells has become an essential goal to enable their large-scale production. In this work, we have simulated, modeled and optimized the structure of a single solar cell that consists of a non-toxic cesium–tin–iodine
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Vibrational wave scattering in disordered ultra-thin film with integrated nanostructures Appl. Rheol. (IF 1.8) Pub Date : 2023-02-06 Sansabilla Bouchareb, Rachid Tigrine, Sabah Fetah
A theoretical model, the phase-field matching theory, has been used to investigate the localized states, their associated states, the local vibrational density of states, the coherent conductance, and the associated thermal conductivity of the perturbed ultra-thin film quasi-dimensional crystalline lattice. The defect disrupts the system’s translational symmetry in the perpendicular direction to it
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Determination of gamma-ray transmission factors of WO3–TeO2–B2O3 glasses using MCNPX Monte Carlo code for shielding and protection purposes Appl. Rheol. (IF 1.8) Pub Date : 2023-01-02 Ghada ALMisned, Duygu Sen Baykal, Gulfem Susoy, Gokhan Kilic, Hesham M. H. Zakaly, Antoaneta Ene, Huseyin Ozan Tekin
The aim of this study is to assess the individual gamma-ray transmission factors (TFs) and some fundamental gamma-ray attenuation properties of several types of glasses based on WO3–TeO2–B2O3 glasses system. MCNPX (version 2.7.0) is used for the calculation of TFs. Other critical parameters are determined using the Phy-X/PSD program. To determine the TFs of studied glasses, several medical radioisotopes
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Assessment of the usability conditions of Sb2O3–PbO–B2O3 glasses for shielding purposes in some medical radioisotope and a wide gamma-ray energy spectrum Appl. Rheol. (IF 1.8) Pub Date : 2023-01-02 Ghada ALMisned, Duygu Sen Baykal, Gokhan Kilic, Gulfem Susoy, Hesham M. H. Zakaly, Antoaneta Ene, Huseyin Ozan Tekin
We report some fundamental gamma-ray shielding properties and individual transmission factors (TFs) of five distinct glass samples with a nominal composition of xSb2O3·(40 − x)PbO·60B2O3·0.5CuO and (where; 0 ≤ x ≤ 40 mol%). Phy-X/PSD and MCNPX (version 2.7.0) Monte Carlo code are utilized to determine several critical parameters, such as cross-sections, attenuation coefficients, half and tenth value
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Reinforcement placement on mechanics and deformation of stepped reinforced retaining wall experimental study of characteristics Appl. Rheol. (IF 1.8) Pub Date : 2022-12-22 Yalin Zhu, Renyi Chen, Liming Wu, Qian Xu, Zijian Zhan
Three sets of indoor model tests of reinforced retaining walls were conducted to study the effects of reinforcing material placement on the displacement of reinforced retaining walls, wall top settlement, earth pressure distribution, and potential failure surface. The test results show that under different reinforcement laying conditions, the maximum horizontal displacement of the lower wall panel
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Effect of phosphogypsum and water-retaining in the stabilization and durability of stabilized mortars Appl. Rheol. (IF 1.8) Pub Date : 2022-12-02 Alessandra Zaleski, Janaíde Cavalcante Rocha
This work corresponds to a study on using a cellulose-based water-retaining agent, hydroxypropyl methylcellulose (HPMC), in phosphogypsum (PG)-stabilized mortars. The results in cementitious pastes showed that when PG replaced cement, there was a reduction in the fluidity of the mixture (by 64.32%) and a drastic increase in the flow stress (from 1.8 to 614.0 Pa) due to its greater need for water, proving
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Evaluation of four different cogeneration cycles by using some criteria Appl. Rheol. (IF 1.8) Pub Date : 2022-10-19 Rabi Karaali, Arzu Keven
The purpose of this article is to evaluate four different gas turbine cogeneration cycles which are basic, absorption cooling, air heating and air fuel heating cogeneration cycles by using the most important six evaluation criteria for different excess air coefficient, different compression rates, and different compressor inlet air temperatures. These six evaluation criteria are electrical heat ratio
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Rheological thixotropy and pasting properties of food thickening gums orienting at improving food holding rate Appl. Rheol. (IF 1.8) Pub Date : 2022-09-27 Yuhe Fan, Lixun Zhang, Xingyuan Wang, Keyi Wang, Lan Wang, Zhenhan Wang, Feng Xue, Jinghui Zhu, Chao Wang
The viscosity characteristic is an important factor affecting the holding rate of the meal-assisting instrument. The effects of shear rheological properties, thixotropy, and pasting properties of xanthan gum (XG), guar gum (GG), and thorn bean gum (TBG) in deionized water, berry juice (BJ), and nut lotus root starch (NLRS) were investigated using a rotational viscometer and a water bath, respectively
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Determining the gas accumulation period using fluid inclusion observations: Xiang Zhong Basin, China Appl. Rheol. (IF 1.8) Pub Date : 2022-09-21 Wei Zhu, Yongdi Qi, Shixin Dai, Mingsu Shen
There are a large number of natural gas shows in the Upper Paleozoic of the central Hunan Basin. However, the hydrocarbon accumulation process was complicated due to the strong tectonic reformation in this area. A study of the natural gas accumulation period is of significance for determining gas accumulation models. In this research, the fluid inclusion samples were tested, the fluid inclusion occurrence
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In-line measurement and modeling of temperature, pressure, and blowing agent dependent viscosity of polymer melts Appl. Rheol. (IF 1.8) Pub Date : 2022-08-02 Tobias Schaible, Christian Bonten
During processing and bubble growth processes, the melt viscosity changes with temperature, pressure, and blowing agent concentration. Therefore, measurement and prediction methods for viscosity characterization in terms of temperature, pressure, and blowing agent dependency are needed. This study demonstrates the applicability of in-line viscosity measurements during the foam injection molding process
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Free volumes in mixed-tacticity poly(3-hydroxybutyrate) determined by viscosimetry and their correlations with structural features and mechanical properties Appl. Rheol. (IF 1.8) Pub Date : 2022-07-28 Daniel Van Opdenbosch, Martin Kretschmer, Oliver Lieleg, Cordt Zollfrank
The viscosities of poly(3-hydroxybutyrate) (PHB) with mixed tacticities were determined as functions of temperature and shearing rate via plate–plate viscosimetry, and fitted by a combined Herschel–Bulkley–Cross–Doolittle model while applying Carvalho et al.’s single-point correction. They were compared to values of slit viscosimetry, obtained during processing at a temperature of 428 K. In both cases
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Structure of pumpkin pectin and its effect on its technological properties Appl. Rheol. (IF 1.8) Pub Date : 2022-07-21 Baississe Salima, Dridi Seloua, Fahloul Djamel, Mezdour Samir
The aim of this work is to investigate the structural features, physicochemical, rheological, and emulsifying properties of pectin extracted from pumpkin “Cucurbita maxima” pulp and peel. After the peel and pulp of fresh pumpkin were solubilized in water at high temperature (80°C) and clarification, the obtained filtrate was treated with aluminum sulphate, which precipitates a fibrous coagulum. The
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GIS-based landslide susceptibility mapping using frequency ratio and index of entropy models for She County of Anhui Province, China Appl. Rheol. (IF 1.8) Pub Date : 2022-06-13 Yu Liu, Anying Yuan, Zhigang Bai, Jingzhong Zhu
Landslides caused countless economic and casualty losses in China, especially in mountainous and hilly areas. Landslide susceptibility mapping is an important approach and tool for landslide disaster prevention and control. This study presents a landslide susceptibility assessment using frequency ratio (FR) and index of entropy (IOE) models within a geographical information system for She County in
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Mechanical properties of sandstone under hydro-mechanical coupling Appl. Rheol. (IF 1.8) Pub Date : 2022-06-09 Tao Tan, Yanlin Zhao, Xun Zhao, Le Chang, Sheng Ren
Study of mechanical properties of rock under hydro-mechanical coupling. The MTS815 rock mechanics system is used to perform triaxial compression tests of water-saturated sandstones under different confining pressures and pore water pressures. The results show that the peak deviation stress and its corresponding axial strain, residual deviation stress, initial deviation stress of dilation and deformation
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Modeling thixotropic break-down behavior of dense anaerobically digested sludge Appl. Rheol. (IF 1.8) Pub Date : 2022-06-07 Mitsuharu Terashima, Yoko Kotegawa, Meng Sun, Bing Liu, Hidenari Yasui
Mixing and homogenization in anaerobic digesters are affected by the flow curve of sludge. The aim of this study is to mathematically express the flow curve of dense anaerobically digested sludge behaving as thixotropic and pseudoplastic fluids. Time-dependent changes in two pseudoplastic parameters, i.e., consistency index (µ p) and pseudoplastic index (n), by shear are modeled using a second-order
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Direct Shear Test and Shear Strength Model of Clay-Filled Joints Appl. Rheol. (IF 1.8) Pub Date : 2021-01-01 Le Chang, Yanlin Zhao, Yixian Wang, Tao Tan
To better study the shear characteristics of infilled joints with soil having different moisture contents, the influence of the moisture content on the shear characteristics of the infilled joint was explored in this paper, and a revised shear strength model of infilled joint surface is proposed. The results show that the shear dilatation modes of joints can be divided into four types: pure shear dilatation
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How quarry waste limestone filler affects the rheological behavior of cement-based materials Appl. Rheol. (IF 1.8) Pub Date : 2021-01-01 Salim Safiddine, Kamel Amokrane, Farid Debieb, Hamza Soualhi, Benchaa Benabed, El-Hadj Kadri
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)
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Experimental determination and modeling of flow curves of xanthan gum solutions over a large range of shear rates Appl. Rheol. (IF 1.8) Pub Date : 2021-01-01 Julian Sepulveda, Agnes Montillet, Dominique Della Valle, Thanina Amiar, Hubert Ranchon, Catherine Loisel, Alain Riaublanc
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 10 5 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
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Stress effect & scale effect on shear properties of double saw-tooth rock joint surface Appl. Rheol. (IF 1.8) Pub Date : 2021-01-01 Zhanyou Luo, Mingyao Jiang, Linfei Mo, Baoping Zou, Man Huang
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
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Flow and Yield Characteristics of Yield Stress Fluids Using Hysteresis Loop Test Below Slip Yield Point Appl. Rheol. (IF 1.8) Pub Date : 2021-01-01 Yasunori Sato, Yukinobu Sugihara, Tsutomu Takahashi
The flow characteristics of angel O/W emulsion, which is a yield stress fluid, was investigated. The hysteresis loop test was conducted for the strain below the slip yield point, and the single relaxation Maxwell model was used to fit the experimental data. Using these methods, the shear-rate dependence, stress dependence, and time dependence of the viscoelastic properties of the sample were evaluated
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Rheological Characterization of Yield-Stress Fluids with Brookfield Viscometer Appl. Rheol. (IF 1.8) Pub Date : 2021-01-01 Andrei Potanin, Greggory Marron
This paper analyzes various techniques to use viscometers equipped with vane spindles to characterize rheological properties of yield stress fluids. Specifically, application of Brookfield viscometers to this end is discussed. A wide selection of toothpastes and lotions were tested. It is shown that a simple method based on apparent shear rate and stress, commonly referred to as a representative viscosity