International Journal of Engineering Science最新文献_第8页

Mesoscale models for effective elastic properties of carbon-black/ultra-high-molecular-weight-polyethylene nanocomposites 碳黑/超高分子量聚乙烯纳米复合材料有效弹性性能的中尺度模型

IF 5.7 1区工程技术

International Journal of Engineering Science Pub Date : 2024-10-08 DOI: 10.1016/j.ijengsci.2024.104159

Stanislav Buklovskiy , Kateryna Miroshnichenko , Igor Tsukrov , Rebecca J. Thomson , Peder C. Solberg , Douglas W. Van Citters

{"title":"Mesoscale models for effective elastic properties of carbon-black/ultra-high-molecular-weight-polyethylene nanocomposites","authors":"Stanislav Buklovskiy , Kateryna Miroshnichenko , Igor Tsukrov , Rebecca J. Thomson , Peder C. Solberg , Douglas W. Van Citters","doi":"10.1016/j.ijengsci.2024.104159","DOIUrl":"10.1016/j.ijengsci.2024.104159","url":null,"abstract":"<div><div>In this paper, we apply mesoscale numerical modeling to predict the effective elastic properties of conductive carbon-black/ultra-high-molecular-weight-polyethylene nanocomposites. The models are based on X-ray microcomputed tomography images. The images show that for the considered range of carbon additive weight fractions, the conductive carbon black (CB) particles are distributed around the ultra-high-molecular-weight-polyethylene (UHMWPE) granules forming a carbon-containing layer of a thickness on the order of 1–2 <span><math><mrow><mi>μ</mi><mi>m</mi></mrow></math></span>.</div><div>Finite element models of representative volume elements (RVE), incorporating the CB-containing layer, are developed. The RVEs are generated based on the size and shape statistics extracted from processed microcomputed tomography images with further incorporation of the CB-containing layer by a custom image processing code. The layer is modeled analytically as a 2-phase composite consisting of spherical CB inclusions distributed in the UHMWPE matrix. Elastic moduli predicted in the models are compared to experimental data. Results show that the numerical simulations predict effective elastic moduli within the confidence intervals of the experimental measurements up to 7.5 wt % of CB inclusions.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"205 ","pages":"Article 104159"},"PeriodicalIF":5.7,"publicationDate":"2024-10-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142418652","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

On the refined boundary condition at the edge of a thin elastic strip supported by a Winkler-type foundation under antiplane shear deformation 关于反平面剪切变形下由温克勒型地基支撑的弹性薄带边缘的细化边界条件

IF 5.7 1区工程技术

International Journal of Engineering Science Pub Date : 2024-10-05 DOI: 10.1016/j.ijengsci.2024.104152

Ludmila Prikazchikova , Evgeniya Nolde , Wiktoria Miszuris , Julius Kaplunov

引用次数: 0

Effects of interfacial sliding on anti-plane waves in an elastic plate imperfectly attached to an elastic half-space 界面滑动对不完全附着于弹性半空间的弹性板中反面波的影响

IF 5.7 1区工程技术

International Journal of Engineering Science Pub Date : 2024-10-05 DOI: 10.1016/j.ijengsci.2024.104158

Gennadi I. Mikhasev , Victor A. Eremeyev

{"title":"Effects of interfacial sliding on anti-plane waves in an elastic plate imperfectly attached to an elastic half-space","authors":"Gennadi I. Mikhasev , Victor A. Eremeyev","doi":"10.1016/j.ijengsci.2024.104158","DOIUrl":"10.1016/j.ijengsci.2024.104158","url":null,"abstract":"<div><div>We study the anti-plane shear waves in a domain consisting of an elastic layer (plate) with a coating attached to an elastic half-space (substrate). We assume an imperfect contact between the layer and the half-space, allowing some sliding. We also assume some elastic bonds between the layer and the substrate. On the free top surface we apply the compatibility conditions within the Gurtin–Murdoch surface elasticity. We found two different solutions: (i) the transversely exponential–transversely exponential (TE–TE) regime with amplitudes decaying exponentially from the free top surface and the interface in both the plate and the half-space, and (ii) the transversely harmonic–transversely exponential (TH–TE) regime with harmonic wave behaviour in the transverse direction in the plate and exponential decay in the half-space. The TE regime of anti-plane waves in an elastic half-space with non-perfect contact is also considered as a special case. A detailed analysis of the derived dispersion relations reveals a crucial influence of the interface stiffness on the phase velocities of anti-plane waves. This effect consists in the decrease of the phase velocities when the interfacial bonds are weakened. The strongest effect of the interfacial sliding on the phase velocities was observed for the long-length waves belonging to the TE–TE regime. Based on the derived lower bounds for the wave numbers from which the TE–TE regime of anti-plane waves exists, we have developed the theoretical background and methodology for assessing the bond stiffness of thin plates imperfectly bonded to an elastic substrate.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"205 ","pages":"Article 104158"},"PeriodicalIF":5.7,"publicationDate":"2024-10-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142418649","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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The energy balance of a hydraulic fracture at depth 深层水力压裂的能量平衡

IF 5.7 1区工程技术

International Journal of Engineering Science Pub Date : 2024-09-28 DOI: 10.1016/j.ijengsci.2024.104151

Carlo Peruzzo, Andreas Möri, Brice Lecampion

引用次数: 0

On the kinetics of structural evolution in metallic glasses 论金属玻璃的结构演变动力学

IF 5.7 1区工程技术

International Journal of Engineering Science Pub Date : 2024-09-28 DOI: 10.1016/j.ijengsci.2024.104146

S.Y. Liang , F. Zhu , Yun-Jiang Wang , E. Pineda , T. Wada , H. Kato , J.C. Qiao

{"title":"On the kinetics of structural evolution in metallic glasses","authors":"S.Y. Liang , F. Zhu , Yun-Jiang Wang , E. Pineda , T. Wada , H. Kato , J.C. Qiao","doi":"10.1016/j.ijengsci.2024.104146","DOIUrl":"10.1016/j.ijengsci.2024.104146","url":null,"abstract":"<div><div>The classic phenomenological models fail to describe the physical landscape of creep deformation for amorphous solids. In this paper, creep behavior of typical metallic glasses with chemical compositions La<sub>62</sub>Al<sub>14</sub>Ag<sub>2.34</sub>Ni<sub>10.83</sub>Co<sub>10.83</sub>, Pd<sub>20</sub>Pt<sub>20</sub>Cu<sub>20</sub>Ni<sub>20</sub>P<sub>20</sub> and Cu<sub>46</sub>Zr<sub>39</sub>Hf<sub>8</sub>Al<sub>7</sub> were studied. Instead, we attempt to use a modified hierarchically correlated model informed by physics to realize the creep behaviors of metallic glasses. The anelastic deformation of creep is categorized into two distinct components, i.e., the highly correlated deformation unit sensitive to annealing and the low correlated unit associated with diffusion relaxation. The correlated component diminishes with structural aging. The validity of the model is verified by these findings, and the derived parameters provide insights into the structural and kinetic characteristics of metallic glasses. Decreased characteristic times and contrasting correlation factors indicate homogeneous structure and lower energy states. Moreover, a qualitative evaluation of the relative strengths of the dual deformation mechanisms during creep enables the characterization of β relaxation forms, shedding light on the intrinsic attributes of different types of metallic glasses. This methodology additionally facilitates the detection of structural aging and rejuvenation phenomena.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"205 ","pages":"Article 104146"},"PeriodicalIF":5.7,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142330101","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Effect of micro-vessel stenosis severity and hematocrit level on red blood cell dynamics and platelet margination: A numerical study 微血管狭窄严重程度和血细胞比容水平对红细胞动力学和血小板边缘化的影响：数值研究

IF 5.7 1区工程技术

International Journal of Engineering Science Pub Date : 2024-09-28 DOI: 10.1016/j.ijengsci.2024.104155

Ahmed Elhanafy , Yasser Abuouf , Samir Elsagheer , Shinichi Ookawara , Sameh Nada , Mahmoud Ahmed

{"title":"Effect of micro-vessel stenosis severity and hematocrit level on red blood cell dynamics and platelet margination: A numerical study","authors":"Ahmed Elhanafy , Yasser Abuouf , Samir Elsagheer , Shinichi Ookawara , Sameh Nada , Mahmoud Ahmed","doi":"10.1016/j.ijengsci.2024.104155","DOIUrl":"10.1016/j.ijengsci.2024.104155","url":null,"abstract":"<div><div>Understanding many micro-vascular diseases is aided by examining the dynamical behavior of blood cells. For instance, micro-vascular stenosis significantly influences the dynamics of red blood cells and hence causes several micro-vascular disorders. Thus, the objective of the current study is to numerically simulate cellular blood flow in stenosed micro-vessels with different stenosis severities and hematocrits to examine hemodynamic features which have important clinical implications. Red blood cells’ migration, velocity, and deformation are predicted. Furthermore, platelets’ margination and cell-free layer formation are examined. Accordingly, a three-dimensional numerical simulation of blood cells and their interaction with the surrounding plasma is considered. The simulation is performed using a validated code developed for cellular blood flows. Red blood cells’ migration and platelets’ margination are confirmed, which enhances the validity of the code. The obtained results report a high dependence of red blood cells’ migration and platelets’ margination on the hematocrit level, which agrees with other published studies. An asymmetrical cell-free layer thickness is exhibited along the stenosed vessel, with a maximum value at the throat of the stenosis, which greatly affects blood apparent viscosity and induces plasma skimming in this region. In addition, it is found that the cell-free layer thickness is strongly linked to stenosis severity and the hematocrit level. Due to its role in the endothelial cells’ function and structure, the wall shear stress is estimated. A reduction more than 75 % in the wall shear stress is obtained due to stenosis, with maximum values at the throat compared with the healthy case. The Fahraeus effect is examined, and the obtained results are compared with published experimental and computational works with an acceptable degree of agreement.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"205 ","pages":"Article 104155"},"PeriodicalIF":5.7,"publicationDate":"2024-09-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142330002","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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

Buckling analysis of functionally graded nanobeams via surface stress-driven model 通过表面应力驱动模型对功能分级纳米梁进行屈曲分析

IF 5.7 1区工程技术

International Journal of Engineering Science Pub Date : 2024-09-27 DOI: 10.1016/j.ijengsci.2024.104148

Rosa Penna, Giuseppe Lovisi, Luciano Feo

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Surface treatment of metal by combined particle beam 利用组合粒子束对金属进行表面处理

IF 5.7 1区工程技术

International Journal of Engineering Science Pub Date : 2024-09-27 DOI: 10.1016/j.ijengsci.2024.104150

Elena S. Parfenova, Anna G. Knyazeva

{"title":"Surface treatment of metal by combined particle beam","authors":"Elena S. Parfenova, Anna G. Knyazeva","doi":"10.1016/j.ijengsci.2024.104150","DOIUrl":"10.1016/j.ijengsci.2024.104150","url":null,"abstract":"<div><div>This work is related to modeling of metal surface modification process by combined particles beam. On the basis of thermodynamics of irreversible processes, including equations of state in differential form, a nonlinear model is formulated. The model takes into account the interaction of thermal, diffusion and mechanical waves and finiteness of relaxation times of thermal and diffusion processes. For the combined particle flow such model is proposed for the first time. The numerical algorithm is based on implicit difference schemes. The study of the interaction of waves of different nature is carried out on the example of a copper target treated with nickel and gold particles. It is shown that deformations take the maximal value at the left boundary, which is directly related to the presence of impurity concentration gradients. Depending on the pulse duration, the difference between the extrema on the elastic wave becomes less significant. With increasing temperature, obviously, the diffusion process accelerates. The propagation velocities of the interacting waves are different. The character of distributions of concentrations of introduced particles directly depends on the value of parameters proportional to relaxation times.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"205 ","pages":"Article 104150"},"PeriodicalIF":5.7,"publicationDate":"2024-09-27","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142326530","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"RegionCategory":"工程技术","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

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Modeling shock attenuation in hydrogels via frequency-dependent acoustic drag 通过频率相关的声阻力模拟水凝胶中的冲击衰减

IF 5.7 1区工程技术

International Journal of Engineering Science Pub Date : 2024-09-26 DOI: 10.1016/j.ijengsci.2024.104149

Orel Guetta , Daniel Rittel

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Integral micromorphic model reproducing dispersion in 1D continuum 再现一维连续体色散的积分微观模型

IF 5.7 1区工程技术

International Journal of Engineering Science Pub Date : 2024-09-16 DOI: 10.1016/j.ijengsci.2024.104147

Michal Šmejkal , Milan Jirásek , Martin Horák

{"title":"Integral micromorphic model reproducing dispersion in 1D continuum","authors":"Michal Šmejkal , Milan Jirásek , Martin Horák","doi":"10.1016/j.ijengsci.2024.104147","DOIUrl":"10.1016/j.ijengsci.2024.104147","url":null,"abstract":"<div><p>The paper develops a new integral micromorphic elastic continuum model, which can describe dispersion properties of band-gap metamaterials, i.e., metamaterials that inhibit propagation of waves in a certain frequency range. The enrichment consists in nonlocal treatment of three terms in the expression for the potential energy density of the standard micromorphic continuum. After proper calibration, such a formulation can <strong>exactly</strong> reproduce two given branches of the dispersion curve (acoustic and optical), even in cases with a band gap. The calibration process exploits Fourier images of the unknown weight functions, which are analytically deduced from the dispersion relation of the material of interest. The weight functions are then reconstructed in the spatial domain by numerical evaluation of the inverse Fourier transform. The presented approach is validated on several examples, including discrete mass–spring chains with alternating masses, for which the dispersion relation has an explicit analytical form and the optical and acoustic branches are separated by a band gap.</p></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"205 ","pages":"Article 104147"},"PeriodicalIF":5.7,"publicationDate":"2024-09-16","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142235023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":1,"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