首页 > 最新文献

Applied Rheology最新文献

英文 中文
Experimental study of uniaxial compressive mechanical properties of rough jointed rock masses based on 3D printing 基于 3D 打印的粗糙节理岩块单轴压缩力学性能实验研究
IF 1.8 4区 工程技术 Q1 MECHANICS Pub Date : 2024-01-04 DOI: 10.1515/arh-2023-0114
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 angle equals 0° or 90°, the stress–strain curves of serrated joint specimens with various JRC values are basically the same and display a similar variation trend as that of the complete specimen, hence JRC presents a very little impact. When inclination angle varies from 30° to 60°, the stress–strain curves display a significant difference for various JRC values. Both the compressive strength and peak strain increase with the JRC value. With the increase in JRC value, the stress–strain curve exhibits a stress drop point, and with the further increase in JRC value, the stress drop point obviously delays or disappears directly. Variation in uniaxial compressive strength and deformation modulus with inclination angle is approximately U-shape for serrated joint specimens and displays typical anisotropic characteristics. Due to the variation in inclination angles and JRC values, failure modes of serrated joint specimens under uniaxial compression varies from splitting tensile or shear slip failure to compound tensile and shear failure. Rough serrated joint has a strengthening effect on the resistance ability to vertical load, and large roughness can effectively slow down the shear slip failure of jointed rock masses.
粗糙度和倾斜度是影响节理岩体强度和变形特性的重要因素。利用三维打印技术和水泥砂浆材料制作了不同节理粗糙度系数(JRC)和倾角的锯齿状节理试件。然后,对锯齿状节理试件进行了单轴压缩试验。结果表明,当倾角等于 0° 或 90° 时,不同 JRC 值的锯齿形接缝试样的应力-应变曲线基本相同,并呈现出与完整试样相似的变化趋势,因此 JRC 的影响很小。当倾斜角在 30° 至 60° 之间变化时,不同 JRC 值的应力-应变曲线显示出显著差异。抗压强度和峰值应变都随着 JRC 值的增加而增加。随着 JRC 值的增加,应力-应变曲线出现应力下降点,随着 JRC 值的进一步增加,应力下降点明显推迟或直接消失。锯齿状连接试样的单轴抗压强度和变形模量随倾角的变化近似于 U 型,表现出典型的各向异性特征。由于倾角和 JRC 值的变化,锯齿连接试样在单轴压缩下的破坏模式从劈裂拉伸或剪切滑移破坏到复合拉伸和剪切破坏。粗糙的锯齿状节理对抵抗垂直荷载的能力有增强作用,较大的粗糙度可有效减缓节理岩体的剪切滑移破坏。
{"title":"Experimental study of uniaxial compressive mechanical properties of rough jointed rock masses based on 3D printing","authors":"Pu Yuan, Aobo Li, Changning Chen, Xuefeng Lu","doi":"10.1515/arh-2023-0114","DOIUrl":"https://doi.org/10.1515/arh-2023-0114","url":null,"abstract":"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 angle equals 0° or 90°, the stress–strain curves of serrated joint specimens with various JRC values are basically the same and display a similar variation trend as that of the complete specimen, hence JRC presents a very little impact. When inclination angle varies from 30° to 60°, the stress–strain curves display a significant difference for various JRC values. Both the compressive strength and peak strain increase with the JRC value. With the increase in JRC value, the stress–strain curve exhibits a stress drop point, and with the further increase in JRC value, the stress drop point obviously delays or disappears directly. Variation in uniaxial compressive strength and deformation modulus with inclination angle is approximately U-shape for serrated joint specimens and displays typical anisotropic characteristics. Due to the variation in inclination angles and JRC values, failure modes of serrated joint specimens under uniaxial compression varies from splitting tensile or shear slip failure to compound tensile and shear failure. Rough serrated joint has a strengthening effect on the resistance ability to vertical load, and large roughness can effectively slow down the shear slip failure of jointed rock masses.","PeriodicalId":50738,"journal":{"name":"Applied Rheology","volume":"23 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2024-01-04","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"139105369","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: 0
Strength characteristics and damage constitutive model of sandstone under hydro-mechanical coupling 水力机械耦合作用下砂岩的强度特征和损伤构成模型
IF 1.8 4区 工程技术 Q1 MECHANICS Pub Date : 2023-12-14 DOI: 10.1515/arh-2023-0112
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 (σ p′), residual strength (σ r), effective normal stress (σ n′), effective shear strength (τ n′), elasticity modulus (E), and rupture angle (θ) of sandstone are positively correlated with the confining pressure (σ 3) and negatively correlated with the pore pressure (P). Conversely, Poisson’s ratio (μ) exhibits an opposite relationship. The model parameters exhibit non-linear relationships with the confining pressure (σ 3), with the parameter m decreasing gradually as the confining pressure increases, and the parameter F 0 increasing with higher confining pressure (σ 3). Moreover, the pore pressure (P) and the confining pressure (σ 3) significantly affect the damage variables (D), with the stress value at the damage initiation point increasing with increasing confining pressure (σ 3), while the strain value at the damage initiation point decreasing with increasing pore pressure (P), indicating that pore pressure induces damage development in rocks.
为了研究饱和砂岩的力学特性,对饱和砂岩进行了水力机械耦合试验。建立了一个描述饱和砂岩在孔隙压力下响应的破坏组成模型,并利用三轴试验结果验证了该模型的有效性。结果表明,砂岩的峰值强度(σ p)、有效峰值强度(σ p′)、残余强度(σ r)、有效法向应力(σ n′)、有效剪切强度(τ n′)、弹性模量(E)和断裂角(θ)与约束压力(σ 3)呈正相关,与孔隙压力(P)呈负相关。相反,泊松比 (μ) 则表现出相反的关系。模型参数与封闭压力(σ 3)呈非线性关系,随着封闭压力的增加,参数 m 逐渐减小,而参数 F 0 则随着封闭压力(σ 3)的增加而增大。此外,孔隙压力(P)和约束压力(σ 3)对破坏变量(D)有显著影响,破坏起始点的应力值随着约束压力(σ 3)的增大而增大,而破坏起始点的应变值随着孔隙压力(P)的增大而减小,表明孔隙压力诱导岩石的破坏发展。
{"title":"Strength characteristics and damage constitutive model of sandstone under hydro-mechanical coupling","authors":"Qiang Liu, Yanlin Zhao, Jian Liao, Tao Tan, Xiaguang Wang, Yang Li, Zhe Tan","doi":"10.1515/arh-2023-0112","DOIUrl":"https://doi.org/10.1515/arh-2023-0112","url":null,"abstract":"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 (<jats:italic>σ</jats:italic> <jats:sub>p</jats:sub>), effective peak strength (<jats:italic>σ</jats:italic> <jats:sub>p</jats:sub>′), residual strength (<jats:italic>σ</jats:italic> <jats:sub>r</jats:sub>), effective normal stress (<jats:italic>σ</jats:italic> <jats:sub>n</jats:sub>′), effective shear strength (<jats:italic>τ</jats:italic> <jats:sub>n</jats:sub>′), elasticity modulus (<jats:italic>E</jats:italic>), and rupture angle (<jats:italic>θ</jats:italic>) of sandstone are positively correlated with the confining pressure (<jats:italic>σ</jats:italic> <jats:sub>3</jats:sub>) and negatively correlated with the pore pressure (<jats:italic>P</jats:italic>). Conversely, Poisson’s ratio (<jats:italic>μ</jats:italic>) exhibits an opposite relationship. The model parameters exhibit non-linear relationships with the confining pressure (<jats:italic>σ</jats:italic> <jats:sub>3</jats:sub>), with the parameter <jats:italic>m</jats:italic> decreasing gradually as the confining pressure increases, and the parameter <jats:italic>F</jats:italic> <jats:sub>0</jats:sub> increasing with higher confining pressure (<jats:italic>σ</jats:italic> <jats:sub>3</jats:sub>). Moreover, the pore pressure (<jats:italic>P</jats:italic>) and the confining pressure (<jats:italic>σ</jats:italic> <jats:sub>3</jats:sub>) significantly affect the damage variables (<jats:italic>D</jats:italic>), with the stress value at the damage initiation point increasing with increasing confining pressure (<jats:italic>σ</jats:italic> <jats:sub>3</jats:sub>), while the strain value at the damage initiation point decreasing with increasing pore pressure (<jats:italic>P</jats:italic>), indicating that pore pressure induces damage development in rocks.","PeriodicalId":50738,"journal":{"name":"Applied Rheology","volume":"87 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-12-14","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138687897","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: 0
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 寒冷地区冻融花岗岩中层结构损伤特征的 CT 测量及其在单次冻融过程中的力学行为初探
IF 1.8 4区 工程技术 Q1 MECHANICS Pub Date : 2023-12-09 DOI: 10.1515/arh-2023-0106
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 analysis of the distribution of meso-cracks in granite after FT cycles. Subsequently, a finite element model was established to explore the mechanical properties of minerals in granite during a single FT process. The results show that the FT damage inside the granite exhibits fracture characteristics, and the number of internal cracks, cracks area, and voxel porosity increase with the increase of FT cycles. After 80 FT cycles, the distribution of meso-cracks on the cross-section of granite exhibits significant anisotropy, and the distribution density and variation coefficient of meso-cracks vary with the dip direction angle of the reference line. The maximum principal stress and strain in the finite element model are negatively related to temperature. The maximum principal stress and strain of biotite minerals are consistently higher than those of feldspar and mica during FT cycles. The results can provide a reference for exploring the internal mechanism of the weakening of mechanical properties of granite microstructure caused by FT damage in cold regions.
利用计算机断层扫描(CT)图像研究了不同冻融循环后花岗岩的冻融(FT)损伤特征。提取图像中的三维(3D)体积数,得到不同冻融循环下花岗岩代表性体积元素(RVE)的三维孔隙结构。选择 80 次 FT 循环后的花岗岩 CT 图像绘制参考线,用于定量分析 FT 循环后花岗岩中观裂纹的分布情况。随后,建立了有限元模型,以探讨花岗岩在单次 FT 过程中的矿物力学性能。结果表明,花岗岩内部的 FT 损伤表现出断裂特征,内部裂缝数量、裂缝面积和体孔率随着 FT 循环次数的增加而增加。经过 80 次 FT 循环后,花岗岩截面上的中裂纹分布呈现出明显的各向异性,中裂纹的分布密度和变化系数随基准线的倾角变化而变化。有限元模型中的最大主应力和应变与温度呈负相关。在 FT 循环过程中,生物岩矿物的最大主应力和应变始终高于长石和云母。研究结果可为探索寒冷地区花岗岩微结构因 FT 破坏而导致力学性能减弱的内在机理提供参考。
{"title":"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","authors":"Chunyang Zhang, Tao Tan, Bo Ke, Bingde Ma, Bibo Dai, Zhiheng Fang, Ercheng Zhao","doi":"10.1515/arh-2023-0106","DOIUrl":"https://doi.org/10.1515/arh-2023-0106","url":null,"abstract":"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 analysis of the distribution of meso-cracks in granite after FT cycles. Subsequently, a finite element model was established to explore the mechanical properties of minerals in granite during a single FT process. The results show that the FT damage inside the granite exhibits fracture characteristics, and the number of internal cracks, cracks area, and voxel porosity increase with the increase of FT cycles. After 80 FT cycles, the distribution of meso-cracks on the cross-section of granite exhibits significant anisotropy, and the distribution density and variation coefficient of meso-cracks vary with the dip direction angle of the reference line. The maximum principal stress and strain in the finite element model are negatively related to temperature. The maximum principal stress and strain of biotite minerals are consistently higher than those of feldspar and mica during FT cycles. The results can provide a reference for exploring the internal mechanism of the weakening of mechanical properties of granite microstructure caused by FT damage in cold regions.","PeriodicalId":50738,"journal":{"name":"Applied Rheology","volume":"7 1","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"138563182","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: 0
An effective method for real-time estimation of slope stability with numerical back analysis based on particle swarm optimization 基于粒子群优化的数值反分析实时估计边坡稳定性的有效方法
IF 1.8 4区 工程技术 Q1 MECHANICS Pub Date : 2023-01-01 DOI: 10.1515/arh-2022-0143
Jiaqiang Zou, Hao Chen, Yu-hong Jiang, W. Zhang, Aihua Liu
Abstract 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 stability analysis and back analysis of soil parameters are both included based on numerical simulation. The mechanical parameters of the bank slope were first back-analyzed using particle swarm optimization (PSO), and real-time stability analysis with high accuracy and efficiency was then established based on multiple continuously monitored displacements. Two case studies were carried out in this study. The results show that (1) based on the real-time monitored displacement and numerical simulation, the mechanical parameters of the slope can be reasonably retrieved through PSO; and (2) based on the inverse mechanical parameters, the safety factors of the slope can be numerically obtained, so that the real-time estimation of slope stability can be realized.
摘要本文旨在为库区边坡稳定性的实时评价提供一种有效的方法,对各种工程实践中开展滑坡灾害防治风险管理具有重要意义。本文提出了降雨或水库水位影响下岸坡稳定性评价的综合思路。在数值模拟的基础上,进行了边坡稳定性分析和土体参数反分析。首先利用粒子群算法(PSO)对岸坡力学参数进行反分析,建立基于多次连续监测位移的高精度、高效的岸坡实时稳定性分析。本研究进行了两个案例研究。结果表明:(1)基于位移实时监测和数值模拟,通过粒子群算法可以合理地反演边坡的力学参数;(2)基于反力学参数,可以数值计算边坡的安全系数,从而实现边坡稳定性的实时估计。
{"title":"An effective method for real-time estimation of slope stability with numerical back analysis based on particle swarm optimization","authors":"Jiaqiang Zou, Hao Chen, Yu-hong Jiang, W. Zhang, Aihua Liu","doi":"10.1515/arh-2022-0143","DOIUrl":"https://doi.org/10.1515/arh-2022-0143","url":null,"abstract":"Abstract 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 stability analysis and back analysis of soil parameters are both included based on numerical simulation. The mechanical parameters of the bank slope were first back-analyzed using particle swarm optimization (PSO), and real-time stability analysis with high accuracy and efficiency was then established based on multiple continuously monitored displacements. Two case studies were carried out in this study. The results show that (1) based on the real-time monitored displacement and numerical simulation, the mechanical parameters of the slope can be reasonably retrieved through PSO; and (2) based on the inverse mechanical parameters, the safety factors of the slope can be numerically obtained, so that the real-time estimation of slope stability can be realized.","PeriodicalId":50738,"journal":{"name":"Applied Rheology","volume":" ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48615941","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: 0
Tailoring a symmetry for material properties of tellurite glasses through tungsten(vi) oxide addition: Mechanical properties and gamma-ray transmissions properties 通过添加钨(vi)氧化物为碲酸盐玻璃的材料特性定制对称性:机械特性和伽马射线透射特性
IF 1.8 4区 工程技术 Q1 MECHANICS Pub Date : 2023-01-01 DOI: 10.1515/arh-2022-0151
G. Almisned, Z. Khattari, El Rabaa, Y. Rammah, Duygu Sen Baykal, G. Kilic, H. Zakaly, A. Ene, H. Tekin
Abstract 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 MeV energy range. Poisson’s ratio (σ) decreased from 0.43017 to 0.42711, while all elastic moduli increased linearly with the molar increment of either [WO3] or [TeO2] in the molecular structure of the glass network. Moreover, gamma-ray attenuation properties are enhanced as a function of increasing WO3 substitution amount from 30 to 50% mol in the glass structure. Half-value layer values at 15 MeV are found to be between 2.648 and 2.8614 cm. I4 samples with a composition of 20TeO2–50WO3–30GdF3 and density of 6.0530 g/cm3 was found to have superior material properties in terms of elastic and gamma-ray attenuation properties. It can be concluded that maximized WO3 contribution into the tellurite glasses may be considered as a critical tool in terms of establishing a symmetry between mechanical and gamma-ray attenuation properties for high-density tellurite glasses for their potential utilization in nuclear waste management, radiation shielding, and radioactive source transportation purposes.
摘要我们报道了通过增加玻璃结构中氧化钨(vi)的浓度,碲化物玻璃的机械和伽马射线透射特性的相关结果。应用Makishima–Mackenzie模型估计了所研究玻璃的力学性能和泊松比(σ)。使用各种基本参数的伽马射线衰减特性在0.015-15中确定 MeV能量范围。泊松比(σ)从0.43017下降到0.42711,而所有弹性模量都随着玻璃网络分子结构中[WO3]或[TeO2]的摩尔增量线性增加。此外,伽马射线衰减特性随着玻璃结构中WO3取代量从30摩尔%增加到50摩尔%而增强。15时的半值图层值 MeV在2.648和2.8614之间 cm.I4样品,成分为20TeO2–50WO3–30GdF3,密度为6.0530 g/cm3在弹性和伽马射线衰减特性方面具有优越的材料特性。可以得出的结论是,在高密度碲化物玻璃的机械和伽马射线衰减特性之间建立对称性方面,最大化WO3对碲化物眼镜的贡献可以被视为一种关键工具,用于其在核废物管理、辐射屏蔽和放射源运输目的中的潜在用途。
{"title":"Tailoring a symmetry for material properties of tellurite glasses through tungsten(vi) oxide addition: Mechanical properties and gamma-ray transmissions properties","authors":"G. Almisned, Z. Khattari, El Rabaa, Y. Rammah, Duygu Sen Baykal, G. Kilic, H. Zakaly, A. Ene, H. Tekin","doi":"10.1515/arh-2022-0151","DOIUrl":"https://doi.org/10.1515/arh-2022-0151","url":null,"abstract":"Abstract 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 MeV energy range. Poisson’s ratio (σ) decreased from 0.43017 to 0.42711, while all elastic moduli increased linearly with the molar increment of either [WO3] or [TeO2] in the molecular structure of the glass network. Moreover, gamma-ray attenuation properties are enhanced as a function of increasing WO3 substitution amount from 30 to 50% mol in the glass structure. Half-value layer values at 15 MeV are found to be between 2.648 and 2.8614 cm. I4 samples with a composition of 20TeO2–50WO3–30GdF3 and density of 6.0530 g/cm3 was found to have superior material properties in terms of elastic and gamma-ray attenuation properties. It can be concluded that maximized WO3 contribution into the tellurite glasses may be considered as a critical tool in terms of establishing a symmetry between mechanical and gamma-ray attenuation properties for high-density tellurite glasses for their potential utilization in nuclear waste management, radiation shielding, and radioactive source transportation purposes.","PeriodicalId":50738,"journal":{"name":"Applied Rheology","volume":" ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47920279","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
Analysis of complex fluid discharge from consumer dispensing bottles using rheology and flow visualization 使用流变学和流动可视化分析消费者配药瓶的复杂流体排放
IF 1.8 4区 工程技术 Q1 MECHANICS Pub Date : 2023-01-01 DOI: 10.1515/arh-2022-0144
Baran Teoman, A. Potanin, P. Armenante
Abstract 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 of rheologically different fluids from a dispensing bottle provided with a modified hand pump. The fluids were described in terms of rheological parameters established by fitting rheometric data with the Carreau equation. The effect of operational parameters was also studied, which included the dip tube diameter, suction pressure, and volumetric flow rate. The data were also analyzed in terms of the dimensionless region of interest (ROI), which captures the relative “high-velocity” region in the fluid during the discharge process and is measured directly using PIV. Both rheological and operational parameters affect the heel at the end of the discharge process. The results presented here enable predicting the heel either by measuring ROI as in the case of transparent fluids and packages or by making use of the heel correlation with operational and rheological parameters also established in this work. Graphical abstract
复杂的液体,如凝胶、洗发水和面霜,在消费品行业中无处不在。然而,关于它们从消费包装中排放的信息很少,往往导致相当大的脚跟,即在排放过程完成后的残余废物。在这里,我们使用流变学分析和颗粒图像测速(PIV)来研究流变学不同的流体从配备改进的手动泵的点胶瓶中排出的情况。用卡罗方程拟合流变数据所建立的流变参数来描述流体。研究了浸管直径、吸压、体积流量等操作参数的影响。数据还根据无量纲感兴趣区域(ROI)进行了分析,该区域捕获了放电过程中流体中的相对“高速”区域,并直接使用PIV进行测量。在排出过程结束时,流变学和操作参数都会影响鞋跟。本文提出的结果可以通过测量透明流体和包裹的ROI来预测鞋跟,或者通过利用鞋跟与本工作中建立的操作和流变参数的相关性来预测鞋跟。图形抽象
{"title":"Analysis of complex fluid discharge from consumer dispensing bottles using rheology and flow visualization","authors":"Baran Teoman, A. Potanin, P. Armenante","doi":"10.1515/arh-2022-0144","DOIUrl":"https://doi.org/10.1515/arh-2022-0144","url":null,"abstract":"Abstract 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 of rheologically different fluids from a dispensing bottle provided with a modified hand pump. The fluids were described in terms of rheological parameters established by fitting rheometric data with the Carreau equation. The effect of operational parameters was also studied, which included the dip tube diameter, suction pressure, and volumetric flow rate. The data were also analyzed in terms of the dimensionless region of interest (ROI), which captures the relative “high-velocity” region in the fluid during the discharge process and is measured directly using PIV. Both rheological and operational parameters affect the heel at the end of the discharge process. The results presented here enable predicting the heel either by measuring ROI as in the case of transparent fluids and packages or by making use of the heel correlation with operational and rheological parameters also established in this work. Graphical abstract","PeriodicalId":50738,"journal":{"name":"Applied Rheology","volume":" ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45898617","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
Research and optimization of tunnel construction scheme for super-large span high-speed railway tunnel in poor tuff strata 贫凝灰岩地层中特大跨高速铁路隧道施工方案研究与优化
4区 工程技术 Q1 MECHANICS Pub Date : 2023-01-01 DOI: 10.1515/arh-2023-0101
Jianfei Ma, Shaohui He, Xiabing Liu, Jiaxin He
Abstract 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 of the shallow super-large span high-speed railway tunnel are proposed and simulated by the Finite Difference Method, including eight schemes for grade V rocks and 12 schemes for grades IV and III rocks. The mechanical response of grade V rock mass is simulated by the Bolt–Kelvin Mohr–Coulomb rheological model. The influence of construction method, rock grade, area, quantity, and excavation sequence of pilot tunnels on the rock deformation and the internal force of the primary support are comparatively explored. For further analysis, an 8 month field test was conducted to study the optimized effect of the construction scheme. Finally, a suggested construction method selection chart for super-large span tunnels in weak rocks (spans between 17 and 34 m) has been proposed. The research conclusion could provide a reference for building the super-large span tunnel in complex conditions.
摘要快速发展的交通对浅埋四线高速铁路隧道提出了需求,而浅埋四线高速铁路隧道的施工技术尚未见报道。本文采用数值分析和现场试验相结合的方法,对弱凝灰岩地层中跨度26.3 m的四线浅埋高速铁路隧道施工方案进行了研究。首先,采用有限差分法对高速铁路浅埋超大跨隧道的20种施工方案进行了数值模拟,其中V级围岩8种,IV、III级围岩12种。采用Bolt-Kelvin Mohr-Coulomb流变模型模拟了V级岩体的力学响应。比较探讨了施工方法、岩石等级、导洞面积、数量、开挖顺序等对岩石变形和主支护内力的影响。为了进一步分析,进行了为期8个月的现场试验,研究了施工方案的优化效果。最后,提出了软弱岩中(17 ~ 34 m)特大跨隧道的施工方法选择建议图。研究结论可为复杂条件下的超大跨度隧道施工提供参考。
{"title":"Research and optimization of tunnel construction scheme for super-large span high-speed railway tunnel in poor tuff strata","authors":"Jianfei Ma, Shaohui He, Xiabing Liu, Jiaxin He","doi":"10.1515/arh-2023-0101","DOIUrl":"https://doi.org/10.1515/arh-2023-0101","url":null,"abstract":"Abstract 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 of the shallow super-large span high-speed railway tunnel are proposed and simulated by the Finite Difference Method, including eight schemes for grade V rocks and 12 schemes for grades IV and III rocks. The mechanical response of grade V rock mass is simulated by the Bolt–Kelvin Mohr–Coulomb rheological model. The influence of construction method, rock grade, area, quantity, and excavation sequence of pilot tunnels on the rock deformation and the internal force of the primary support are comparatively explored. For further analysis, an 8 month field test was conducted to study the optimized effect of the construction scheme. Finally, a suggested construction method selection chart for super-large span tunnels in weak rocks (spans between 17 and 34 m) has been proposed. The research conclusion could provide a reference for building the super-large span tunnel in complex conditions.","PeriodicalId":50738,"journal":{"name":"Applied Rheology","volume":"12 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"135440219","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: 0
Thickened fluids classification based on the rheological and tribological characteristics 基于流变学和摩擦学特性的增稠流体分类
4区 工程技术 Q1 MECHANICS Pub Date : 2023-01-01 DOI: 10.1515/arh-2023-0102
Parisa Poursani, Seyed M. A. Razavi
Abstract 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 cluster contained the highest coefficient of friction value (0.529 ± 0.008), and the fourth cluster comprised the highest consistency coefficient (19.42 ± 0.01 Pa s n ), strain-stiffening ratio (0.42 ± 0.01), yield stress (28.61 ± 0.10 Pa), and frequency dependency of viscous modulus (12.18 ± 0.02). The results also indicated that the classification of in vitro thickened liquid characteristics could be developed based on the interconnection between tribology and rheology. The presented methodology is capable of comparison of test results across the International dysphagia diet standardization initiative and line-spread test.
提出了一种基于黄原胶-芥籽胶的增稠液分类新方案。为此,测量了包括稳态剪切、小振幅振荡剪切、大振幅振荡剪切和摩擦学参数在内的力学特性,并使用K -means方法将其分为四类。结果表明,摩擦系数最高(0.529±0.008),一致性系数最高(19.42±0.01 Pa s n),应变加筋比最高(0.42±0.01),屈服应力最高(28.61±0.10 Pa),粘滞模量频率依赖性最高(12.18±0.02)。结果还表明,可以基于摩擦学和流变学之间的联系建立体外增稠液特性的分类。所提出的方法能够比较国际吞咽困难饮食标准化倡议和线扩展测试的测试结果。
{"title":"Thickened fluids classification based on the rheological and tribological characteristics","authors":"Parisa Poursani, Seyed M. A. Razavi","doi":"10.1515/arh-2023-0102","DOIUrl":"https://doi.org/10.1515/arh-2023-0102","url":null,"abstract":"Abstract 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 cluster contained the highest coefficient of friction value (0.529 ± 0.008), and the fourth cluster comprised the highest consistency coefficient (19.42 ± 0.01 Pa s n ), strain-stiffening ratio (0.42 ± 0.01), yield stress (28.61 ± 0.10 Pa), and frequency dependency of viscous modulus (12.18 ± 0.02). The results also indicated that the classification of in vitro thickened liquid characteristics could be developed based on the interconnection between tribology and rheology. The presented methodology is capable of comparison of test results across the International dysphagia diet standardization initiative and line-spread test.","PeriodicalId":50738,"journal":{"name":"Applied Rheology","volume":"3 1","pages":"0"},"PeriodicalIF":0.0,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"136256766","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: 0
A study on the fractal and permeability characteristics of coal-based porous graphite for filtration and impregnation 过滤浸渍用煤基多孔石墨的分形及渗透特性研究
IF 1.8 4区 工程技术 Q1 MECHANICS Pub Date : 2023-01-01 DOI: 10.1515/arh-2022-0157
Qili Wang, J. Wang, Shuwei Yang, Jiarui Sun
Abstract 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 optimized to simplify the calculation. In addition, the percolation evolution process of mercury in the porous media was analyzed based on the data collected in the experiment. According to the analysis conducted, the FDs in the backbone formation regions of samples varied from 2.695 to 2.984, with 2.923 to 2.991 in the percolation regions and 1.224 to 1.544 in the tortuosity. Based on the correlation coefficients ( R 2 ) ({R}^{2}) ranging between 0.906 and 0.999, and the root mean square errors ranging between 0.0001 and 0.0065 mL g−1, a high level of reliability was identified. According to the MIP test, the mercury distribution in porous graphite demonstrated a transitional process from the local aggregation, the gradual expansion, the infinite cluster connection to the global connection.
摘要为了区分多孔石墨在过滤和浸渍过程中所采用的非均匀分形结构的差异,根据分形理论,采用压汞孔隙率计(MIP)获得了分形维数,计算了10个石墨样品的体积分形维数。对弯曲度的FD表达式以及MIP测试的所有参数进行了优化,以简化计算。此外,根据实验数据,分析了汞在多孔介质中的渗流演化过程。根据所进行的分析,样品骨架形成区域的FD在2.695至2.984之间变化,渗透区域的FD为2.923至2.991,曲折度为1.224至1.544。基于范围在0.906和0.999之间的相关系数(R2)({R}^{2}),以及范围在0.0001和0.0065之间的均方根误差 mL g−1,确定了高水平的可靠性。根据MIP测试,汞在多孔石墨中的分布表现出从局部聚集、逐渐膨胀、无限团簇连接到全局连接的过渡过程。
{"title":"A study on the fractal and permeability characteristics of coal-based porous graphite for filtration and impregnation","authors":"Qili Wang, J. Wang, Shuwei Yang, Jiarui Sun","doi":"10.1515/arh-2022-0157","DOIUrl":"https://doi.org/10.1515/arh-2022-0157","url":null,"abstract":"Abstract 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 optimized to simplify the calculation. In addition, the percolation evolution process of mercury in the porous media was analyzed based on the data collected in the experiment. According to the analysis conducted, the FDs in the backbone formation regions of samples varied from 2.695 to 2.984, with 2.923 to 2.991 in the percolation regions and 1.224 to 1.544 in the tortuosity. Based on the correlation coefficients ( R 2 ) ({R}^{2}) ranging between 0.906 and 0.999, and the root mean square errors ranging between 0.0001 and 0.0065 mL g−1, a high level of reliability was identified. According to the MIP test, the mercury distribution in porous graphite demonstrated a transitional process from the local aggregation, the gradual expansion, the infinite cluster connection to the global connection.","PeriodicalId":50738,"journal":{"name":"Applied Rheology","volume":" ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"49595267","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: 0
Mechanical behavior of a new similar material for weathered limestone in karst area: An experimental investigation 喀斯特地区风化石灰岩一种新型相似材料的力学性能试验研究
IF 1.8 4区 工程技术 Q1 MECHANICS Pub Date : 2023-01-01 DOI: 10.1515/arh-2022-0154
Nan Jiang, Panpan Guo, Hui Zhang, Fangqing Lu, Jian Liu
Abstract 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 important reference and basis for the next proposed model tests on the stability of tuff strata in karst areas. The results indicate that a stable mechanical behavior can be achieved for the similar material made of quartz sand, cement, gypsum, limestone powder, diatomite, red clay, and water. Moreover, it is also found that the aggregate and the binder have an observable influence on the mechanical behavior of the similar material. With an increase in the amount of cement and gypsum, the homogeneity of the sample increases, failure mode in which the specimen shows lateral compression damage. However, with increasing the amount of quartz sand, there is a tendency that a weak structural plane will be generated within the sample. Thus, this similar material can be satisfactorily used for simulating limestone of different weathering degrees in a scaled model test.
摘要考虑到矿物成分的重要影响,本文基于量纲方法推导了相似准则。制作了适用于岩溶地区不同风化程度凝灰岩的类似材料。通过正交试验,系统地研究了不同配合比的同类材料的力学性能。为今后提出的岩溶地区凝灰岩稳定性模型试验提供了重要的参考和依据。结果表明,由石英砂、水泥、石膏、石灰石粉、硅藻土、红粘土和水制成的类似材料可以获得稳定的力学性能。此外,还发现集料和粘合剂对类似材料的机械性能有明显的影响。随着水泥和石膏用量的增加,试样的均匀性增加,试样表现出侧向压缩损伤的破坏模式。然而,随着石英砂数量的增加,样品内有产生弱结构面的趋势。因此,这种类似的材料可以令人满意地用于在比例模型试验中模拟不同风化程度的石灰石。
{"title":"Mechanical behavior of a new similar material for weathered limestone in karst area: An experimental investigation","authors":"Nan Jiang, Panpan Guo, Hui Zhang, Fangqing Lu, Jian Liu","doi":"10.1515/arh-2022-0154","DOIUrl":"https://doi.org/10.1515/arh-2022-0154","url":null,"abstract":"Abstract 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 important reference and basis for the next proposed model tests on the stability of tuff strata in karst areas. The results indicate that a stable mechanical behavior can be achieved for the similar material made of quartz sand, cement, gypsum, limestone powder, diatomite, red clay, and water. Moreover, it is also found that the aggregate and the binder have an observable influence on the mechanical behavior of the similar material. With an increase in the amount of cement and gypsum, the homogeneity of the sample increases, failure mode in which the specimen shows lateral compression damage. However, with increasing the amount of quartz sand, there is a tendency that a weak structural plane will be generated within the sample. Thus, this similar material can be satisfactorily used for simulating limestone of different weathering degrees in a scaled model test.","PeriodicalId":50738,"journal":{"name":"Applied Rheology","volume":" ","pages":""},"PeriodicalIF":1.8,"publicationDate":"2023-01-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46338601","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: 0
期刊
Applied Rheology
全部 Acc. Chem. Res. ACS Applied Bio Materials ACS Appl. Electron. Mater. ACS Appl. Energy Mater. ACS Appl. Mater. Interfaces ACS Appl. Nano Mater. ACS Appl. Polym. Mater. ACS BIOMATER-SCI ENG ACS Catal. ACS Cent. Sci. ACS Chem. Biol. ACS Chemical Health & Safety ACS Chem. Neurosci. ACS Comb. Sci. ACS Earth Space Chem. ACS Energy Lett. ACS Infect. Dis. ACS Macro Lett. ACS Mater. Lett. ACS Med. Chem. Lett. ACS Nano ACS Omega ACS Photonics ACS Sens. ACS Sustainable Chem. Eng. ACS Synth. Biol. Anal. Chem. BIOCHEMISTRY-US Bioconjugate Chem. BIOMACROMOLECULES Chem. Res. Toxicol. Chem. Rev. Chem. Mater. CRYST GROWTH DES ENERG FUEL Environ. Sci. Technol. Environ. Sci. Technol. Lett. Eur. J. Inorg. Chem. IND ENG CHEM RES Inorg. Chem. J. Agric. Food. Chem. J. Chem. Eng. Data J. Chem. Educ. J. Chem. Inf. Model. J. Chem. Theory Comput. J. Med. Chem. J. Nat. Prod. J PROTEOME RES J. Am. Chem. Soc. LANGMUIR MACROMOLECULES Mol. Pharmaceutics Nano Lett. Org. Lett. ORG PROCESS RES DEV ORGANOMETALLICS J. Org. Chem. J. Phys. Chem. J. Phys. Chem. A J. Phys. Chem. B J. Phys. Chem. C J. Phys. Chem. Lett. Analyst Anal. Methods Biomater. Sci. Catal. Sci. Technol. Chem. Commun. Chem. Soc. Rev. CHEM EDUC RES PRACT CRYSTENGCOMM Dalton Trans. Energy Environ. Sci. ENVIRON SCI-NANO ENVIRON SCI-PROC IMP ENVIRON SCI-WAT RES Faraday Discuss. Food Funct. Green Chem. Inorg. Chem. Front. Integr. Biol. J. Anal. At. Spectrom. J. Mater. Chem. A J. Mater. Chem. B J. Mater. Chem. C Lab Chip Mater. Chem. Front. Mater. Horiz. MEDCHEMCOMM Metallomics Mol. Biosyst. Mol. Syst. Des. Eng. Nanoscale Nanoscale Horiz. Nat. Prod. Rep. New J. Chem. Org. Biomol. Chem. Org. Chem. Front. PHOTOCH PHOTOBIO SCI PCCP Polym. Chem.
×
引用
GB/T 7714-2015
复制
MLA
复制
APA
复制
导出至
BibTeX EndNote RefMan NoteFirst NoteExpress
×
0
微信
客服QQ
Book学术公众号 扫码关注我们
反馈
×
意见反馈
请填写您的意见或建议
请填写您的手机或邮箱
×
提示
您的信息不完整,为了账户安全,请先补充。
现在去补充
×
提示
您因"违规操作"
具体请查看互助需知
我知道了
×
提示
现在去查看 取消
×
提示
确定
Book学术官方微信
Book学术文献互助
Book学术文献互助群
群 号:481959085
Book学术
文献互助 智能选刊 最新文献 互助须知 联系我们:info@booksci.cn
Book学术提供免费学术资源搜索服务,方便国内外学者检索中英文文献。致力于提供最便捷和优质的服务体验。
Copyright © 2023 Book学术 All rights reserved.
ghs 京公网安备 11010802042870号 京ICP备2023020795号-1