Mechanics of Time-Dependent Materials最新文献_第10页

Analysis of waste discharge concentration in radiative hybrid nanofluid flow over a stretching/shrinking sheet with chemical reaction 辐射混合纳米流体在拉伸/收缩薄片上的化学反应废物排放浓度分析

IF 2.1 4区材料科学

Mechanics of Time-Dependent Materials Pub Date : 2024-12-11 DOI: 10.1007/s11043-024-09752-x

Ashish Mishra

{"title":"Analysis of waste discharge concentration in radiative hybrid nanofluid flow over a stretching/shrinking sheet with chemical reaction","authors":"Ashish Mishra","doi":"10.1007/s11043-024-09752-x","DOIUrl":"10.1007/s11043-024-09752-x","url":null,"abstract":"<div><p>This study examines the hydrothermal characteristics of hybrid nanofluid flow over a sheet in the presence of thermal radiation, chemical reaction, and waste discharge concentration to develop effective waste treatment and pollution control methods. The partial differential equations (PDEs) governing the conservation of mass, momentum, energy, and concentration, which are nonlinear, are transformed into ordinary differential equations (ODEs) using similarity transformations. The next stage in the process is to solve these differential equations using the bvp4c technique available in MATLAB. The study thoroughly explores several nondimensional parameters, including suction/blowing, Darcy number, stretching/shrinking parameter, local pollutant external source parameter, and chemical reaction parameter, visually illustrating their impacts on flow patterns, thermal distribution, and concentration profiles. The scrutiny focuses on key engineering parameters such as skin friction coefficient, heat transfer rate, and mass transfer rate, supported by tabular data that enhances the quantitative evaluation of these parameters. It is found that the velocity of hybrid nanofluid upsurges with the increment in the stretching/shrinking parameter and Darcy number. Also, results obtained reveal that the concentration profiles experience an upward shift with an increase in unsteadiness parameter and local pollutant external source parameter. Moreover, the Sherwood number decreases by 10.65% as the local pollutant external source parameter, ranging from 0.03 to 0.09, is increased.</p></div>","PeriodicalId":698,"journal":{"name":"Mechanics of Time-Dependent Materials","volume":"29 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-12-11","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142810876","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Energy evolution characteristics and mechanical properties of freeze-thawed red sandstone under repeat impact loading 重复冲击载荷作用下冻融红砂岩能量演化特征及力学性能

IF 2.1 4区材料科学

Mechanics of Time-Dependent Materials Pub Date : 2024-12-10 DOI: 10.1007/s11043-024-09741-0

Yonghui Shen, Rongrong Zhang, Dongdong Ma

{"title":"Energy evolution characteristics and mechanical properties of freeze-thawed red sandstone under repeat impact loading","authors":"Yonghui Shen, Rongrong Zhang, Dongdong Ma","doi":"10.1007/s11043-024-09741-0","DOIUrl":"10.1007/s11043-024-09741-0","url":null,"abstract":"<div><p>To investigate the mechanical properties and energy evolution characteristics of freeze-thawed (F-T) red sandstone subjected to repeated impact loads, a series of repeated impacts were conducted on F-T red sandstone specimens using a split Hopkinson pressure bar (SHPB) device. The results demonstrate that with an increase in F-T cycle numbers, there is a continuous decrease in P-wave velocity accompanied by an increase in porosity and the number of cracks, leading to significant alterations in the microstructure. Both peak stress and modulus of elasticity show negative correlations with both the repeated impact times and F-T cycle numbers, whereas the peak strain and average strain rate exhibit positive correlations with these parameters. Moreover, the absorption energy per unit volume increases with both impact times and F-T cycle numbers, whereas the cumulative absorption energy per unit volume follows a linear increment trend. The established dynamic constitutive model can accurately describe the dynamic stress–strain characteristics of specimens under the repeated impact, demonstrating its high precision in forecasting. Furthermore, the observed failure mode of the specimen was characterized by tensile behavior, with a transition from intergranular fractures to transgranular fractures evident in the microcracks.</p></div>","PeriodicalId":698,"journal":{"name":"Mechanics of Time-Dependent Materials","volume":"29 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-12-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142798261","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Dynamic tensile properties of thermally treated concrete specimens subjected to varied heating rates: an investigation using the digital image correlation method 不同升温速率下热处理混凝土试件的动态拉伸性能：使用数字图像相关方法的研究

IF 2.1 4区材料科学

Mechanics of Time-Dependent Materials Pub Date : 2024-12-09 DOI: 10.1007/s11043-024-09750-z

Ronghua Shu, Jiabao Cheng, Guang Xu, Yuzhang Lai, Lijinhong Huang

{"title":"Dynamic tensile properties of thermally treated concrete specimens subjected to varied heating rates: an investigation using the digital image correlation method","authors":"Ronghua Shu, Jiabao Cheng, Guang Xu, Yuzhang Lai, Lijinhong Huang","doi":"10.1007/s11043-024-09750-z","DOIUrl":"10.1007/s11043-024-09750-z","url":null,"abstract":"<div><p>In concrete engineering, high temperatures at varying heating rates significantly affect the stability of concrete structures. In this paper, the dynamic tensile characteristics were investigated on concrete specimens subjected to heating rates ranging from 2 to 40 °C/min, using the digital image correlation (DIC) method. The results reveal a critical heating rate threshold, between 5 and 10 °C/min, which marks a shift in the influence of heating rates on both physical and dynamic tensile properties. Below this threshold, changes are minimal, but beyond it, significant effects are observed. As the heating rate increases, longitudinal wave velocity, density, and mass decrease, while porosity increases. Both wave velocity and dynamic tensile strength exhibit a linear decline with increasing heating rates, whereas porosity increases linearly. Additionally, when the heating rate surpasses the threshold, the angle between the failure surface and the loading bar increases, and the maximum principal strain in the direction perpendicular to the loading direction, measured on the specimen’s plane, decreases. Initial failure occurs at the location of highest strain, typically along the central axis of the specimen. These findings suggest that rapid heating should be avoided in concrete engineering to maintain structural integrity. However, rapid heating could be used to break and reuse concrete materials.</p></div>","PeriodicalId":698,"journal":{"name":"Mechanics of Time-Dependent Materials","volume":"29 1","pages":""},"PeriodicalIF":2.1,"publicationDate":"2024-12-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142798405","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis of solid lubricating materials microstructures properties in the frame of cylindrical coordinates system and reduced micromorphic model 在圆柱坐标系和还原微形态模型框架下分析固体润滑材料的微观结构特性

IF 2.5 4区材料科学

Mechanics of Time-Dependent Materials Pub Date : 2024-09-16 DOI: 10.1007/s11043-024-09734-z

A. R. El-Dhaba, H. K. Awad, S. M. Mousavi

{"title":"Analysis of solid lubricating materials microstructures properties in the frame of cylindrical coordinates system and reduced micromorphic model","authors":"A. R. El-Dhaba, H. K. Awad, S. M. Mousavi","doi":"10.1007/s11043-024-09734-z","DOIUrl":"https://doi.org/10.1007/s11043-024-09734-z","url":null,"abstract":"<p>In this paper, we provide detailed variational formulations for the reduced micromorphic model in rectangular and cylindrical coordinates. In these formulations, the material is modeled as consisting of deformable particles that exhibit microstrain and macroscopic strain fields. This microstrain field is independent of the macroscopic strain field of the entire material. In addition, all the kinematical and kinetical variables, equations of motion, and boundary conditions are formulated depending on the displacement and microstrain fields. Here we define the conditions that give the reduced micromorphic model with decoupled equations of motion such that the displacement field is described as independent of the microstrain field. In addition, we show the applicability of the developed formulation to investigate the simple shear behavior of solid-lubricant cylindrical films. An analytical solution for this model is developed, and numerical results are represented to demonstrate the microstructural topology effects on the mechanics of the lubricant film. The formulations and revealed findings of the present study are important for the design of novel coating architectures materials.</p>","PeriodicalId":698,"journal":{"name":"Mechanics of Time-Dependent Materials","volume":"4 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142248984","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Quadratic regression model for response surface methodology based on sensitivity analysis of heat transport in mono nanofluids with suction and dual stretching in a rectangular frame 基于矩形框架中具有吸力和双重拉伸的单纳米流体热传输灵敏度分析的响应面方法二次回归模型

IF 2.1 4区材料科学

Mechanics of Time-Dependent Materials Pub Date : 2024-09-09 DOI: 10.1007/s11043-024-09715-2

Shan Ali Khan, Haihu Liu, Muhammad Imran, Umar Farooq, Sumeira Yasmin, Binjian Ma, Abdullah Alhushaybari

{"title":"Quadratic regression model for response surface methodology based on sensitivity analysis of heat transport in mono nanofluids with suction and dual stretching in a rectangular frame","authors":"Shan Ali Khan, Haihu Liu, Muhammad Imran, Umar Farooq, Sumeira Yasmin, Binjian Ma, Abdullah Alhushaybari","doi":"10.1007/s11043-024-09715-2","DOIUrl":"10.1007/s11043-024-09715-2","url":null,"abstract":"<div><p>The study of fluid flow and heat transfer within a rectangular frame domain has diverse applications across various engineering fields, including energy and power, cooling technology, and nuclear reactors. Motivated by these applications, the current research examines the steady incompressible flow of two different mononanofluids: copper/ethylene glycol–water and titanium dioxide/ethylene glycol–water, within a rectangular frame. The dynamics of the flow, influenced by magnetohydrodynamics (MHD) effects and thermal radiation, are presented. The analysis includes the effects of suction and dual stretching behavior. Additionally, statistical analysis has been conducted to highlight skin-friction characteristics. The dimensionless system of equations has been solved numerically with the help of a numerical shooting scheme. Additionally, experimental design (response surface methodology) and sensitivity are performed for skin frictions. The rheological effects of the relevant parameters against subjective fields are analyzed through graphical representation.</p></div>","PeriodicalId":698,"journal":{"name":"Mechanics of Time-Dependent Materials","volume":"28 3","pages":"1019 - 1048"},"PeriodicalIF":2.1,"publicationDate":"2024-09-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142181947","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Thermomechanical characterisation and plane stress linear viscoelastic modelling of ethylene-tetra-fluoroethylene foils 乙烯-四氟乙烯箔的热力学特性和平面应力线性粘弹性建模

IF 2.5 4区材料科学

Mechanics of Time-Dependent Materials Pub Date : 2024-08-28 DOI: 10.1007/s11043-024-09704-5

Alessandro Comitti, Federico Bosi

{"title":"Thermomechanical characterisation and plane stress linear viscoelastic modelling of ethylene-tetra-fluoroethylene foils","authors":"Alessandro Comitti, Federico Bosi","doi":"10.1007/s11043-024-09704-5","DOIUrl":"https://doi.org/10.1007/s11043-024-09704-5","url":null,"abstract":"<p>Ethylene-tetra-fluoroethylene (ETFE) is a polymer employed in tension membrane structures with mechanical properties that strongly depend on time and temperature effects. A comprehensive understanding of the mutual influence of these variables and a unified viscoelastic constitutive model design can enable wider exploitation of ETFE in sustainable lightweight construction. This study presents a thermomechanical characterisation of ETFE foils through quasi-static tensile experiments spanning two orders of magnitude of strain rates, creep, relaxation, shear and dynamic cyclic tests in a wide range of temperatures suitable for building applications, from <span>(-20^{circ }text{ C})</span> to <span>(60^{circ }text{ C})</span>. The experimental results in different material orientations are used to identify the limits of the linear viscoelastic domain, define the direction-dependent creep compliance master curves and calibrate the parameters of a plane stress orthotropic linear viscoelastic model, employing the Boltzmann superposition and the time-temperature superposition principles. The model has been numerically implemented using a recursive integration algorithm and its code is provided open source. A validation on independently acquired data shows the accuracy of the constitutive model in predicting ETFE behaviour within the linear viscoelastic regime usually adopted during structural design, with excellent extrapolation capabilities outside the range of the calibration data.</p>","PeriodicalId":698,"journal":{"name":"Mechanics of Time-Dependent Materials","volume":"96 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-08-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142181948","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Finite element modelling of ultrasonic assisted hot pressing of metal powder 金属粉末超声波辅助热压的有限元建模

IF 2.5 4区材料科学

Mechanics of Time-Dependent Materials Pub Date : 2024-08-27 DOI: 10.1007/s11043-024-09735-y

Rezvan Abedini, Vahid Fartashvand, Amir Abdullah, Yunes Alizadeh

{"title":"Finite element modelling of ultrasonic assisted hot pressing of metal powder","authors":"Rezvan Abedini, Vahid Fartashvand, Amir Abdullah, Yunes Alizadeh","doi":"10.1007/s11043-024-09735-y","DOIUrl":"https://doi.org/10.1007/s11043-024-09735-y","url":null,"abstract":"<p>Ultrasonication has widely been used in many industries to develop advanced materials, improve materials behaviors, and enhance mechanical strength to name a few. The present investigation aims to accelerate the densification mechanisms during the hot-pressing process of Ti-6Al-4 V powder through high power ultrasonication. A computational study has been developed and implemented to simulate the consolidation behavior, then compared with the experimental data to ensure the simulation accuracy. The constitutive equations, encompassing thermoplastic and power-law creep models, were implemented in the simulation as UMAT and CREEP subroutines. Finally, the simulation results in densification curves and density distribution have been compared with the results of experimental tests. The comparison of the simulation and experimental results shows a maximum error of 6.8 and 2.8% in predicting the densification behavior of hot pressing without and with ultrasonication, respectively. The results show the good accuracy of the simulation in predicting final relative density and density distribution with ultrasonic vibrations.</p>","PeriodicalId":698,"journal":{"name":"Mechanics of Time-Dependent Materials","volume":"18 1","pages":""},"PeriodicalIF":2.5,"publicationDate":"2024-08-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142181949","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Implementation of finite element scheme to study thermal and mass transportation in water-based nanofluid model under quadratic thermal radiation in a disk 实施有限元方案，研究圆盘二次热辐射条件下水基纳米流体模型中的热量和质量传输

IF 2.1 4区材料科学

Mechanics of Time-Dependent Materials Pub Date : 2024-08-23 DOI: 10.1007/s11043-024-09736-x

Muhammad Sohail, Kamaleldin Abodayeh, Umar Nazir

引用次数: 0

Numerical analysis of TiO2–Al2O3/water and Ag–MoS2/water hybrid nanofluid flow over a rotating disk with thermal radiation and Cattaneo–Christov heat flux effects 带有热辐射和卡塔尼奥-克里斯托夫热通量效应的旋转圆盘上 TiO2-Al2O3/ 水和 Ag-MoS2/ 水混合纳米流体流动的数值分析

IF 2.1 4区材料科学

Mechanics of Time-Dependent Materials Pub Date : 2024-08-19 DOI: 10.1007/s11043-024-09732-1

Nahid Fatima, Ali Basem, Umar Farooq, Muhammad Imran, Madeeha Tahir, Naim Ben Ali, Wajdi Rajhi, Hassan Waqas

{"title":"Numerical analysis of TiO2–Al2O3/water and Ag–MoS2/water hybrid nanofluid flow over a rotating disk with thermal radiation and Cattaneo–Christov heat flux effects","authors":"Nahid Fatima, Ali Basem, Umar Farooq, Muhammad Imran, Madeeha Tahir, Naim Ben Ali, Wajdi Rajhi, Hassan Waqas","doi":"10.1007/s11043-024-09732-1","DOIUrl":"10.1007/s11043-024-09732-1","url":null,"abstract":"<div><p>The study of nanofluids using a stretchy disc has lately gained importance in fluid mechanics. This work investigates the impacts of the Cattaneo-Christov model, heat radiation, and melting events on TiO<sub>2</sub>–Al<sub>2</sub>O<sub>3</sub>/water and Ag–MoS<sub>2</sub>/water hybrid nanofluids over a disc. The results show that hybrid nanofluids greatly increase the thermal conductivity and heat transfer capabilities of base fluids. Water-based hybrid nanofluids are used in military applications such as solar thermal energy, heating pumps, heat exchanger devices, ships, air cleaners, the automotive industry, electric chillers, nuclear-powered systems, turbines, and equipment. To explain the flow of hybrid nanofluids, the two-dimensional nonlinear governing equations, which include the continuity, momentum, and heat transfer rate equations, are expressed in a non-dimensional form. The bvp4c solver firing technique in MATLAB is used to solve these non-dimensional equations and investigate the physical effects of various parameters on velocity and temperature profiles. Increasing the magnetic parameter and nanoparticle volume fraction substantially affects the velocity profile in opposing flow. Greater values of the thermal radiation and heat source-sink parameters result in a greater temperature profile. In addition, raising the thermal relaxation and melting parameters improves the temperature profile. The study’s findings may be utilized in various sectors, including drainage, chemical engineering, solar panels, solar absorption and filtration, groundwater hydrology, solar cells, and other sheet flow applications.</p></div>","PeriodicalId":698,"journal":{"name":"Mechanics of Time-Dependent Materials","volume":"28 3","pages":"1313 - 1329"},"PeriodicalIF":2.1,"publicationDate":"2024-08-19","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142181950","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

The effect of a geometry-based breathing crack model on a viscoelastic composite rotor-shaft system 基于几何形状的呼吸裂缝模型对粘弹性复合材料转子-轴系统的影响

IF 2.5 4区材料科学

Mechanics of Time-Dependent Materials Pub Date : 2024-08-16 DOI: 10.1007/s11043-024-09730-3

S. K. Sutar, K. Ganguly, S. K. Pradhan, R. Pradhan

引用次数: 0