Forces in mechanics最新文献_第8页

Numerical and experimental analysis of sand blasting on polymeric substrates 聚合物基体喷砂的数值与实验分析

Forces in mechanics Pub Date : 2023-08-01 DOI: 10.1016/j.finmec.2023.100208

Erencan Oranli, Nahsan Gungoren, Asghar Heydari Astaraee, Erfan Maleki, Sara Bagherifard, Mario Guagliano

{"title":"Numerical and experimental analysis of sand blasting on polymeric substrates","authors":"Erencan Oranli, Nahsan Gungoren, Asghar Heydari Astaraee, Erfan Maleki, Sara Bagherifard, Mario Guagliano","doi":"10.1016/j.finmec.2023.100208","DOIUrl":"10.1016/j.finmec.2023.100208","url":null,"abstract":"<div><p>In view of the recent interest in modifying the surface functionality and esthetics of polymeric materials by sand blasting treatment, a numerical model was developed as a tool to predict the evolution of surface morphology as a function of blasting parameters. The wide range of shot size and shape variations, typical of blasting media, were parametrized based on microscopical observations. Thus, the developed numerical model accounts for the media inhomogeneity and also implements randomness in both the sequence and position of the multiple impacts. To make the model as realistic as possible, the velocity of individual shots was calculated based on their interaction with the airflow. Systematic experiments were performed using Polycarbonate (PC) as the substrate material and Alumina as the blasting media. A comparison of the experimental and numerical results demonstrated the ability of the developed model to successfully predict the surface roughness generated by sand blasting, as the shot arrangement and distribution were varied. This model establishes a potential basis for future studies regarding the performance of the sand blasted surfaces such as wettability using numerical approaches.</p></div>","PeriodicalId":93433,"journal":{"name":"Forces in mechanics","volume":"12 ","pages":"Article 100208"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46626102","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Analysis on mathematical model of convection system of micropolar fluid as darcy forchheimer flow undergoes heterogeneous and homogeneous chemical reaction darcy forchheimer流发生非均相和均相化学反应时微极流体对流系统的数学模型分析

Forces in mechanics Pub Date : 2023-08-01 DOI: 10.1016/j.finmec.2023.100214

D. Thenmozhi , M. Eswara Rao , R. Punithavalli , P.D. Selvi

{"title":"Analysis on mathematical model of convection system of micropolar fluid as darcy forchheimer flow undergoes heterogeneous and homogeneous chemical reaction","authors":"D. Thenmozhi , M. Eswara Rao , R. Punithavalli , P.D. Selvi","doi":"10.1016/j.finmec.2023.100214","DOIUrl":"10.1016/j.finmec.2023.100214","url":null,"abstract":"<div><p>In this article, to study the fluid behavior on various specific conditions to improve the heat transfer system and here, analysis on mathematical model of dynamic fluid consist of micropolar fluid has allowed micro rotational effect with laminar flow of Darcy forchheimer model which allow inertia effect has incorporated with heterogeneous and homogenous chemical reaction undergoes heat exchanger system with boundary layer problem has modeled. The mathematical model of fluid mechanic governing equations are in the form of partial differential equation (PDE) and similarity transformation into numerical methods (PC4-FDM) of predictor and corrector technique undergoes discretized mesh point and convergence with fourth order finite difference method and shooting method is also equipped to get better solution. The additions of significant heterogeneous parameter depicts that increasing behavior in fluid concentration and homogeneous parameter depicts that decreasing in fluid concentration by allowed micro rotations leads to collision and on increasing the Eckert number related to viscous dissipation has exhibited that increased fluid velocity and decreased fluid temperature. Micro rotation parameter exhibits that similar increased fluid velocity and slight decreased in temperature of the fluid. Darcy forchheimer parameter which related to inertial effect has depicts that decreased in velocity with increased temperature of the fluid in convection system. Due to Industrialization, the study of convection heat transfer system has enormous scope which has necessity to improving the heating and cooling system of industrial mass machineries like powerplant, waste heat recovery unit, pharmaceutical industries etc.</p></div>","PeriodicalId":93433,"journal":{"name":"Forces in mechanics","volume":"12 ","pages":"Article 100214"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"46899122","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Improvement in asphalt binder rutting performance and fatigue life using electrospun polyacrylonitrile (PAN) nanofibers 用静电纺聚丙烯腈纳米纤维改善沥青粘结剂车辙性能和疲劳寿命

Forces in mechanics Pub Date : 2023-08-01 DOI: 10.1016/j.finmec.2023.100226

Alberto Gaxiola , Alexandra Ossa , Laura González-Maturana , Omar Llanes-Cárdenas , M.J. Chinchillas-Chinchillas , Clemente G. Alvarado-Beltrán , Andrés Castro-Beltrán

{"title":"Improvement in asphalt binder rutting performance and fatigue life using electrospun polyacrylonitrile (PAN) nanofibers","authors":"Alberto Gaxiola , Alexandra Ossa , Laura González-Maturana , Omar Llanes-Cárdenas , M.J. Chinchillas-Chinchillas , Clemente G. Alvarado-Beltrán , Andrés Castro-Beltrán","doi":"10.1016/j.finmec.2023.100226","DOIUrl":"10.1016/j.finmec.2023.100226","url":null,"abstract":"<div><p>Recently, high aspect ratio materials like nanofibers with outstanding mechanical properties have been developed and used to improve the mechanical characteristics of construction materials. However, despite the excellent results obtained in asphalt binder modification, only a few types of polymeric nanofibers have been used for this purpose. In this sense, polyacrylonitrile has good thermal and mechanical characteristics to maintain the shape at the typical temperatures the asphalt is heated.</p><p>This study evaluates the effect of electrospun polyacrylonitrile (PAN) nanofibers on the rutting resistance and fatigue parameters of asphalt binders. For this, fibers with an average diameter of 1.3 µm were prepared and randomly dispersed into neat PG 64–22 asphalt binder. Subsequently, a dynamic shear rheometer (DSR) was used to determine <em>G*/sin δ, J<sub>nr</sub>, R<sub>3.2</sub></em>, and <em>N<sub>f</sub></em>.</p><p>In the range studied, <em>Jnr<sub>3.2</sub></em> showed a reduction of up to 35%, and the elastic recovery increased up to 4.5 times compared to the reference material. It was observed that the PAN nanofibers increased the fatigue resistance of asphalt binder at temperatures when the material is predominantly viscoelastic. These results show a promising new application of PAN nanofibers to improve the performance of asphalt pavements.</p></div>","PeriodicalId":93433,"journal":{"name":"Forces in mechanics","volume":"12 ","pages":"Article 100226"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"41308942","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Numerical and experimental investigation for flexural response of Kevlar short fiber tissue/carbon fiber belts toughened honeycomb sandwich plate 凯夫拉短纤维组织/碳纤维带增韧蜂窝夹层板弯曲响应的数值与实验研究

Forces in mechanics Pub Date : 2023-08-01 DOI: 10.1016/j.finmec.2023.100222

Rahul Kumar (Research Scholar), Achchhe Lal (Assistant Professor), B.M. Sutaria (Associate Professor)

{"title":"Numerical and experimental investigation for flexural response of Kevlar short fiber tissue/carbon fiber belts toughened honeycomb sandwich plate","authors":"Rahul Kumar (Research Scholar), Achchhe Lal (Assistant Professor), B.M. Sutaria (Associate Professor)","doi":"10.1016/j.finmec.2023.100222","DOIUrl":"10.1016/j.finmec.2023.100222","url":null,"abstract":"<div><p>This paper investigates the flexural behavior of honeycomb sandwich panels with a toughened/untoughened interface using carbon fiber belt and short aramid fiber tissues. In the first part of the paper, bending response analysis of carbon fiber aluminum honeycomb sandwich plates with an untoughened interface is done using finite element-based first-order shear deformation theory. In the second part, experimental analysis is done to examine the effect of loading rates on the mechanical characteristics of plain and toughened sandwich panels using a three-point bending test. Four types of interface toughening are used as unidirectional and bi-directional stitches of carbon fiber belts, Kevlar short-fiber tissues, and carbon fiber belts combined with Kevlar short-fiber tissues. Experimental result shows that interface toughening improves the maximum load and energy absorbed by sandwich specimens for all loading rates. A scanning electron microscope is used to observe and analyze the failure mode and mechanism of strengthening the interface. It is observed that the stitch of the carbon fiber belt increases the adhesion contact between face sheets and core leading to prevent interfacial debonding. The peak load and energy absorptions of carbon fiber belts toughened interface sandwich are increased by 51 % and 42.5 %, respectively, compared with that of the plain sandwich by a small increment of weight (14%).</p></div>","PeriodicalId":93433,"journal":{"name":"Forces in mechanics","volume":"12 ","pages":"Article 100222"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"44703757","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Heat generation effects on Magnetohydrodynamic Powell-Eyring fluid flow along a vertical surface with a Chemical reaction 具有化学反应的磁流体动力Powell Eyring流体沿垂直表面流动的生热效应

Forces in mechanics Pub Date : 2023-08-01 DOI: 10.1016/j.finmec.2023.100212

D. Iranian, S. Karthik, A. Seethalakshmy

{"title":"Heat generation effects on Magnetohydrodynamic Powell-Eyring fluid flow along a vertical surface with a Chemical reaction","authors":"D. Iranian, S. Karthik, A. Seethalakshmy","doi":"10.1016/j.finmec.2023.100212","DOIUrl":"10.1016/j.finmec.2023.100212","url":null,"abstract":"<div><p>This work examines the influence of double diffusion on MHD Powell-Eyring fluid flow with free convection through a vertical surface. In addition, the impacts of chemical reaction, heat generation, local magnetic field, Grashof number and local modified Grashof number parameters are considered. The analysis of double diffusive in the occurrence of fluid flow under the convective surface conditions is studied. To translate the governing PDEs of velocity, energy and species (solutal) concentration equation, a couple of nonlinear ODEs we relate the suitable transformation of similarity. The set of nonlinear ODE's numerically and attained numerical consequences are connected by those gained through the assistance of MATLAB procedure bvp4c. The impact of prominent constraints of chemical reaction, Prandtl number, Schmidt number, heat source parameter, magneto hydrodynamic parameter, on dimension less velocity, energy and solutal (species) concentration dissemination has been considered. Impacts of different parameters such as skin friction coefficient, Nusselt number and Sherwood number are described through tables.</p></div>","PeriodicalId":93433,"journal":{"name":"Forces in mechanics","volume":"12 ","pages":"Article 100212"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"48662892","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

A fourth-order degradation tensor for an anisotropic damage phase-field model 各向异性损伤相场模型的四阶退化张量

Forces in mechanics Pub Date : 2023-08-01 DOI: 10.1016/j.finmec.2023.100224

A.L.E.R. Petrini , C.L.C.S. Esteves , J.L. Boldrini , M.L. Bittencourt

{"title":"A fourth-order degradation tensor for an anisotropic damage phase-field model","authors":"A.L.E.R. Petrini , C.L.C.S. Esteves , J.L. Boldrini , M.L. Bittencourt","doi":"10.1016/j.finmec.2023.100224","DOIUrl":"10.1016/j.finmec.2023.100224","url":null,"abstract":"<div><p>This work proposes a thermodynamically consistent phase-field model for anisotropic brittle material under the hypotheses of plane stress, small deformation and constant temperature. The model is derived from the principle of virtual power, the first and second laws of thermodynamics in the form of the Clausius-Duhem inequality. The degradation effect on the material behavior is given by a fourth-order degradation tensor introduced as an internal variable that evolves according to the current strain state rather than the conventional scalar degradation function of phase-field models. Therefore, local anisotropy can be induced, changing the material mechanical behavior differently in all directions organically. The proposed degradation tensor is defined in the global coordinate system and therefore is sensitive to any change in the principal directions of the strain and stress states. To demonstrate the model’s capability of representing damage in isotropic and transversely isotropic materials, some benchmark examples were carried out and the evolution of the damage components was analyzed.</p></div>","PeriodicalId":93433,"journal":{"name":"Forces in mechanics","volume":"12 ","pages":"Article 100224"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"47326773","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","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 chemically reactive squeezing flow of silica and titania hybrid nanoparticles in water-based medium between two parallel plates with higher order slip 水基介质中高阶滑移平行板间二氧化硅和二氧化钛杂化纳米颗粒的化学反应挤压流分析

Forces in mechanics Pub Date : 2023-08-01 DOI: 10.1016/j.finmec.2023.100220

O.A. Famakinwa, O.K. Koriko, K.S. Adegbie

{"title":"Analysis of chemically reactive squeezing flow of silica and titania hybrid nanoparticles in water-based medium between two parallel plates with higher order slip","authors":"O.A. Famakinwa, O.K. Koriko, K.S. Adegbie","doi":"10.1016/j.finmec.2023.100220","DOIUrl":"10.1016/j.finmec.2023.100220","url":null,"abstract":"<div><p>Considering the significance of hybrid nanofluid over convectional fluid in terms of high rate of heat transfer, nanoscience and nanotechnology has been enhanced by dispersing nanoparticles in the base fluid to obtain new material with series of properties and applications. In this study, the analysis of chemically reactive squeezing flow conveying silica and titanium dioxide nanoparticles in water-based medium across two parallel plates with higher order velocity slip is carried out employing three different chemical kinetics for exothermic/endothermic reactions. The system of partial differential equations resulting from the fluid model assumed the ordinary differential form in alliance with appropriate similarity variables. The modified ordinary differential equations is simulated numerically in MATLAB software package using fourth order Runge–Kutta integration scheme in line with shooting techniques. The tested validity for limited case conform to preceding reports in the literature. The outcomes from the scrutiny uncovered in tables and graphs revealed that the velocity and temperature distributions of the hybrid nanofluid decrease steadily as first order slip factor varies from 0.2 to 1.0 but increase with second order slip factor at all levels of chemical kinetics. Moreover, for exothermic reaction, the rate of heat transfer decreases at the lower plate by <span><math><mrow><mo>−</mo><mn>221.923</mn><mo>%</mo></mrow></math></span> with increasing value of activation energy parameter when <span><math><mrow><mi>m</mi><mo>=</mo><mo>−</mo><mn>2</mn><mo>,</mo><mn>0</mn><mo>,</mo><mn>0.5</mn></mrow></math></span> but converse is the case in endothermic reaction as the rate of heat transfer increases by <span><math><mrow><mn>106.382</mn><mo>%</mo></mrow></math></span>.</p></div>","PeriodicalId":93433,"journal":{"name":"Forces in mechanics","volume":"12 ","pages":"Article 100220"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"43436327","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On the mechanics of FG nanobeams: A review with numerical analysis FG纳米梁的力学研究进展及数值分析

Forces in mechanics Pub Date : 2023-08-01 DOI: 10.1016/j.finmec.2023.100219

Atteshamuddin S. Sayyad , Lazreg Hadji , Abdelouahed Tounsi

{"title":"On the mechanics of FG nanobeams: A review with numerical analysis","authors":"Atteshamuddin S. Sayyad , Lazreg Hadji , Abdelouahed Tounsi","doi":"10.1016/j.finmec.2023.100219","DOIUrl":"10.1016/j.finmec.2023.100219","url":null,"abstract":"<div><p>Since the classical continuum theories are insufficient to account the small size effects of nanobeams, the nonlocal continuum theories such as Eringen's nonlocal elasticity theory, couple stress theory, strain gradient theory and surface elasticity theory have been proposed by researchers to predict the accurate structural response of isotropic and functionally graded composite nanobeams. This review focuses on research work concerned with analysis of size dependent nanoscale isotropic and functionally graded beams using classical and refined beam theories based on Eringen's nonlocal elasticity theory. The present review article also highlight the possible scope for the future research on nanobeams. In the present study, the authors have developed a new hyperbolic shear deformation theory for the analysis of isotropic and functionally graded nanobeams. The theory satisfy the traction free boundary conditions at the top and the bottom surfaces of the nanobeams. Analytical solutions for the bending, buckling and free vibration analysis of simply-supported nanobeams are obtained using the Navier method. To ensure that the present theory is accurate and valid, the results are compared to previous research.</p></div>","PeriodicalId":93433,"journal":{"name":"Forces in mechanics","volume":"12 ","pages":"Article 100219"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45411739","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1

Evolving geometries, topologies, and apertures in fracture networks: Quantitative insights from lattice modeling 断裂网络中不断演变的几何结构、拓扑结构和孔隙：晶格建模的定量见解

Forces in mechanics Pub Date : 2023-08-01 DOI: 10.1016/j.finmec.2023.100197

Bakul Mathur, Rahul Prabhakaran, Daniel Koehn

{"title":"Evolving geometries, topologies, and apertures in fracture networks: Quantitative insights from lattice modeling","authors":"Bakul Mathur, Rahul Prabhakaran, Daniel Koehn","doi":"10.1016/j.finmec.2023.100197","DOIUrl":"10.1016/j.finmec.2023.100197","url":null,"abstract":"<div><p>Fracture networks are crucial in controlling rock mass permeability. Some of the important features of the fracture networks like the density, interconnectivity, spatial distribution, and fracture apertures determine the success of the subsurface operations. Fracture networks can be studied with analogue studies, physical experiments, and numerical modeling. In this study, we analyse the evolution of a two-dimensional fracture network under gravitational and shear loads using the lattice modeling capabilities of the microstructural modeling environment “Elle”. The simulation cases include varying gravitational loads and Young’s moduli of the formations. The topological progression of the modeled fracture network from isolated to interconnected nodes depicts a realistic network evolution process. The study shows that the rock stiffness exhibits a direct correlation with the number of fractures influencing the average aperture size of the network. A higher gravity load resulted in the development of a sparse fracture network. Stiffer rock models also showed an early onset of fracturing.</p></div>","PeriodicalId":93433,"journal":{"name":"Forces in mechanics","volume":"12 ","pages":"Article 100197"},"PeriodicalIF":0.0,"publicationDate":"2023-08-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"45056537","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

On optimization of heterogeneous materials for enhanced resistance to bulk fracture 非均质材料的优化提高整体断裂抗力

Forces in mechanics Pub Date : 2023-08-01 DOI: 10.1016/j.finmec.2023.100200

Sukhminder Singh , Lukas Pflug , Julia Mergheim , Michael Stingl

引用次数: 1