International Journal of Engineering Science最新文献

{"title":"Effect of wall models on hemodynamics in left coronary artery: A comparative numerical study","authors":"Asif Equbal,&nbsp;Paragmoni Kalita","doi":"10.1016/j.ijengsci.2025.104358","DOIUrl":"10.1016/j.ijengsci.2025.104358","url":null,"abstract":"<div><div>Hemodynamic variables are vital for understanding the progression of cardiovascular diseases, but their accuracy depends on assumptions about arterial wall behaviour. Although the left anterior descending (LAD) branch of the left coronary artery (LCA) has been reported to be highly susceptible to atherosclerosis, there is a significant lack of studies comparing the effects of different wall models in this context. This study employs two-way fluid-structure interaction (FSI) simulations to investigate the impact of rigid, elastic, and hyperelastic wall models on the hemodynamics of a moderately stenosed LAD branch in an idealised LCA. The non-Newtonian properties of blood are captured using the Carreau viscosity model. Key hemodynamic parameters—primary velocity (<span><math><msub><mi>V</mi><mi>p</mi></msub></math></span>), streamwise vorticity, time-averaged wall shear stress (TAWSS), oscillatory shear index (OSI), relative residence time (RRT), and fractional flow reserve (FFR)—are evaluated across these models. Results show that the rigid model mostly exhibits higher <span><math><msub><mi>V</mi><mi>p</mi></msub></math></span> and TAWSS at the stenosis throat compared to the elastic and hyperelastic models. It overestimates the peak TAWSS by 6.22 % and 14.46 % relative to the elastic and hyperelastic models, respectively, suggesting a higher risk of plaque rupture in rigid walls. In terms of plaque progression, both the pre- and post-stenotic regions of the arterial wall show the most extensive affected areas in the hyperelastic model compared to the rigid and elastic models, indicated by severe negative <span><math><msub><mi>V</mi><mi>p</mi></msub></math></span>and critically low values of TAWSS, and critically high values of OSI and RRT. The FFR value is the highest for the hyperelastic model (0.95), followed by the elastic (0.94) and rigid models (0.91). These findings underscore the importance of incorporating arterial wall flexibility in hemodynamic studies to improve risk assessment and clinical accuracy.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"217 ","pages":"Article 104358"},"PeriodicalIF":5.7,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144738286","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}

{"title":"Sound transmission through stiffened magnetoelectroelastic sandwich plates with negative Poisson’s ratio core","authors":"Y.S. Li ,&nbsp;B.L. Liu ,&nbsp;S. Li","doi":"10.1016/j.ijengsci.2025.104372","DOIUrl":"10.1016/j.ijengsci.2025.104372","url":null,"abstract":"<div><div>This study investigates free vibration and sound transmission loss of stiffened magnetoelectroelastic (MEE) sandwich plates incorporating negative Poisson's ratio (NPR) cores. Firstly, a novel three-dimensional NPR structure is designed, and the effective material properties of the NPR structure are calibrated via an artificial neural network. Secondly, the equations of motion for stiffened MEE sandwich plates incorporating NPR cores mentioned above are derived using Hamilton's principle, yielding analytical solutions for free vibration under simply supported boundary conditions. Sound transmission loss (STL) under harmonic acoustic wave incidence is subsequently formulated. Finally, numerical case studies analyze the material properties of NPR cores and STL performance of stiffened MEE sandwich plates. This study elucidates the unique mechanical properties of intelligent NPR structures and establishes evaluation methodologies for multifield coupling effects on the acoustic insulation performance of such lightweight adaptive systems.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"217 ","pages":"Article 104372"},"PeriodicalIF":5.7,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144865084","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}

{"title":"Cosserat media in dynamics","authors":"Géry de Saxcé","doi":"10.1016/j.ijengsci.2025.104368","DOIUrl":"10.1016/j.ijengsci.2025.104368","url":null,"abstract":"<div><div>Our aim is to develop a general approach for the dynamics of material bodies of dimension <span><math><mi>d</mi></math></span> represented by a matter manifold <span><math><mi>N</mi></math></span> of dimension <span><math><mrow><mo>(</mo><mi>d</mi><mo>+</mo><mn>1</mn><mo>)</mo></mrow></math></span> embedded into the space–time <span><math><mi>M</mi></math></span>. It can be specialized for <span><math><mrow><mi>d</mi><mo>=</mo><mn>0</mn></mrow></math></span> (pointwise object), <span><math><mrow><mi>d</mi><mo>=</mo><mn>1</mn></mrow></math></span> (arch if it is a solid, flow in a pipe or jet if it is a fluid), <span><math><mrow><mi>d</mi><mo>=</mo><mn>2</mn></mrow></math></span> (plate or shell if it is a solid, sheet of fluid), <span><math><mrow><mi>d</mi><mo>=</mo><mn>3</mn></mrow></math></span> (bulky bodies). We call torsor a skew-symmetric bilinear map on the vector space of affine real functions on the affine tangent space to the space–time. We use the affine connections as originally developed by Élie Cartan, that is the connections associated to the affine group. We introduce a general principle of covariant divergence free torsor from which we deduce 10 balance equations. We show the relevance of this general principle by applying it for <span><math><mi>d</mi></math></span> from 1 to 4 in the context of the Galilean relativity.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"217 ","pages":"Article 104368"},"PeriodicalIF":5.7,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144865085","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}

{"title":"Effective field methods vs finite element models for microgeometries with ellipsoidal inclusions. Theory and application","authors":"E. Polyzos,&nbsp;L. Pyl","doi":"10.1016/j.ijengsci.2025.104373","DOIUrl":"10.1016/j.ijengsci.2025.104373","url":null,"abstract":"<div><div>This study compares the predictions of analytical and numerical models employing ellipsoidal inclusions to determine the effective properties of composite materials. Three groups of factors influencing homogenization accuracy are investigated: the type of homogenization problem (elasticity, expansion, and conductivity), the material phase characteristics (isotropy, inclusion orientation, and inclusion aspect ratio), and the modeling methodologies, where effective field methods (EFMs) – including the Non-Interaction, the Mori–Tanaka and Maxwell methods – are evaluated against the pseudo grain decomposition method (PGDM) and numerical finite element (FE) models in a parametric study. The study considers ellipsoidal inclusions with aspect ratios ranging from 0.2 to 5 and orientation scattering from completely random to fully aligned. The results indicate that the type of homogenization problem does not significantly affect the prediction accuracy of EFMs and that the Mori–Tanaka and Maxwell methods show excellent agreement with FE models for all properties. The PGDM is shown to yield reliable results only for certain elastic properties (e.g., <span><math><msub><mrow><mi>E</mi></mrow><mrow><mn>11</mn></mrow></msub></math></span>) for composites with inclusions of aspect ratios greater than 1. Therefore, it is concluded that the Mori–Tanaka and the Maxwell methods serve as the most suitable analytical alternatives to computationally intensive FE models.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"217 ","pages":"Article 104373"},"PeriodicalIF":5.7,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145044520","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}

{"title":"On effect of anisotropy on anti-plane shear waves in elastic monoclinic half-space and plates","authors":"Gennadi I. Mikhasev ,&nbsp;Victor A. Eremeyev","doi":"10.1016/j.ijengsci.2025.104392","DOIUrl":"10.1016/j.ijengsci.2025.104392","url":null,"abstract":"<div><div>Within the context of linear surface elasticity, we discuss the propagation of anti-plane surface waves, taking into account the anisotropy of the material. Here, we consider one of the most general crystal systems in the bulk, i.e. monoclinic symmetry. For the free surface, however, we consider rectangular symmetry. We derived the dispersion relations for three structures with surface energy: a half-space with a free surface; a layer of finite thickness; and a two-layered half-space. Surprisingly, these coincide with their isotropic counterparts, differing only in notation. Conversely, the anisotropy of the material in the bulk affects the displacement decay with depth. The pure exponential decay of displacements with the depth now transforms into decay with oscillations.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"217 ","pages":"Article 104392"},"PeriodicalIF":5.7,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145216510","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}

{"title":"Effect of periodic lamellar inclusions on interface integrity","authors":"Chao Tang ,&nbsp;Fei Su ,&nbsp;Wen Zhao ,&nbsp;Jingyu Zhang ,&nbsp;Biao Wang ,&nbsp;Lifeng Ma","doi":"10.1016/j.ijengsci.2025.104380","DOIUrl":"10.1016/j.ijengsci.2025.104380","url":null,"abstract":"<div><div>The bond strength between dissimilar solids is highly sensitive to defects near or within the interface. Interfacial inclusions, which are ubiquitous in materials engineering, play a critical role in determining the local and global integrity of materials or structures. In this article, we propose a theoretical model for periodic rectangular lamellar inclusions at the interface of dissimilar solids. In view of the concept of line inclusion, the Kolosov–Muskhelishvili complex potentials for the homogeneous periodic inclusion problem are derived based on the Green’s function method within the framework of plane elasticity. The explicit analytical solution of the stress field of the inhomogeneous periodic rectangular lamellar inclusion problem with arbitrary eigenstrain distribution is derived with the aid of the equivalent eigenstrain principle. A new stress concentration factor (SCF) is consequently defined to assess the interface strength. The influence of the size and material of rectangular lamellar inclusions on the SCF is analyzed. The accuracy of the theoretical results is further verified by finite element simulations. The analytical formulae established in this study offer a straightforward yet effective approach for various inhomogeneous and homogeneous interfacial inclusion problems encountered in engineering practice.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"217 ","pages":"Article 104380"},"PeriodicalIF":5.7,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144996694","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}

{"title":"Experimental validation of Lamb wave dispersion curves using the Scaled Boundary Finite Element Method (SBFEM)","authors":"Carlos A. Galán Pinilla ,&nbsp;Jorge Gosálbez ,&nbsp;Darío Yesid Peña Ballesteros ,&nbsp;Adan Y. León ,&nbsp;Jabid Eduardo Quiroga","doi":"10.1016/j.ijengsci.2025.104370","DOIUrl":"10.1016/j.ijengsci.2025.104370","url":null,"abstract":"<div><div>Dispersion curves are essential for characterizing Lamb wave propagation. A key challenge in estimating these curves is ensuring both computational efficiency and agreement with experimental results, particularly in complex, multilayered materials. This study focuses on bilayer structures, specifically metallic substrates with viscoelastic coatings, and employs the Scaled Boundary Finite Element Method (SBFEM) to generate dispersion curves. SBFEM discretizes the waveguide cross-section using high-order spectral finite elements and a Gauss–Lobatto–Legendre (GLL) node distribution, assigning a single spectral element per material layer. To validate the SBFEM curves, estimation is compared with experimental data obtained from metallic plates and bilayer structures consisting of viscoelastic coatings on steel substrates. The strong correlation between numerical predictions and experimental results highlights the effectiveness of SBFEM in accurately capturing Lamb wave behavior in bilayer waveguides with viscoelastic coatings while maintaining computational efficiency. These findings reinforce the method’s applicability for the analysis of wave propagation in complex, layered, and dissipative materials.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"217 ","pages":"Article 104370"},"PeriodicalIF":5.7,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145095237","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}

{"title":"Nonlinear dispersive waves in soft elastic laminates under finite magneto–deformations","authors":"Harold Berjamin,&nbsp;Stephan Rudykh","doi":"10.1016/j.ijengsci.2025.104369","DOIUrl":"10.1016/j.ijengsci.2025.104369","url":null,"abstract":"<div><div>Layered media can be used as acoustic filters, allowing only waves of certain frequencies to propagate. In soft magneto-active laminates, the shear wave band gaps (i.e., the frequency intervals for which shear waves cannot propagate) can be adjusted after fabrication by exploiting the magneto-elastic coupling. In the present study, the control of shear wave propagation in magneto-active stratified media is revisited by means of homogenisation theory, and extended to nonlinear waves of moderate amplitude. Building upon earlier works, the layers are modelled by means of a revised hard-magnetic material theory for which the total Cauchy stress is symmetric, and the incompressible elastic response is of generalised neo-Hookean type (encompassing Yeoh, Fung-Demiray, and Gent materials). Using asymptotic homogenisation, a nonlinear dispersive wave equation with cubic nonlinearity is derived, under certain simplifying assumptions. In passing, an effective strain energy function describing such laminates is obtained. The combined effects of nonlinearity and wave dispersion contribute to the formation of solitary waves, which are analysed using the homogenised wave equation and a modified Korteweg–de Vries (mKdV) approximation of the latter. The mKdV equation is compared to direct numerical simulations of the impact problem, and various consequences of these results are explored. In particular, we show that an upper bound for the speed of solitary waves can be adjusted by varying the applied magnetic field, or by modifying the properties of the microstructure.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"217 ","pages":"Article 104369"},"PeriodicalIF":5.7,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144865082","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}

{"title":"Coupled chemo-mechanical constitutive equations and residual stress evolution of swelling hydrogels","authors":"Vivek Kumar Singh,&nbsp;Krishnendu Haldar","doi":"10.1016/j.ijengsci.2025.104390","DOIUrl":"10.1016/j.ijengsci.2025.104390","url":null,"abstract":"<div><div>Hydrogels are cross-linked polymeric materials capable of undergoing large deformation in response to external stimuli, such as chemical gradients and mechanical loading. This article presents a coupled chemo-mechanical model of hydrogel undergoing substantial swelling. A multiplicative decomposition-based framework is adopted to represent simultaneous swelling and mechanical deformation in a consistent thermodynamic way. A nonlinear modified hyperelastic Yeoh–Fleming model is considered for the fully swollen hydrogel to describe the strain energy of the polymer network and is calibrated from the available experiments. After calibrating the model using uniaxial stretching for different volume fractions of the polymer network, the model is then benchmarked with equi-biaxial and pure shear responses. The model calibration at different polymer network volume fractions also allows evolution of the Yeoh–Fleming model parameters with polymer network concentration. Finally, we combine the free energy of mixing of solvent and polymer network and the strain energy of polymer network to solve a coupled boundary value problem (BVP) of free swelling. The solution predicts free swelling of hydrogel and the evolution of residual stresses induced by a slow diffusion phenomenon. The numerical results presented here may provide guidance for significant applications of hydrogels in soft robotics, drug delivery and biomedical systems.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"217 ","pages":"Article 104390"},"PeriodicalIF":5.7,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145154692","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}

{"title":"Isogeometric boundary element analysis of nonlinear liquid sloshing in containers under pitching oscillation","authors":"Quansheng Zang ,&nbsp;Hao Hong ,&nbsp;Jun Liu ,&nbsp;Yanhui Zhong ,&nbsp;Bei Zhang ,&nbsp;Bin Li ,&nbsp;Lei Gan","doi":"10.1016/j.ijengsci.2025.104371","DOIUrl":"10.1016/j.ijengsci.2025.104371","url":null,"abstract":"<div><div>This paper proposes an isogeometric boundary element method (IGABEM) to solve the nonlinear liquid sloshing problem in a rectangular container subjected to oscillatory excitation. Based on the semi-Lagrange approach, a fixed global coordinate system and a local Cartesian coordinate system that moves synchronously with the container are defined. Starting from the Laplace equation, the boundary integral equations for the liquid sloshing problem are derived using Gauss’s divergence theorem and the integration by parts technique, while incorporating nonlinear kinematic and dynamic boundary conditions of the free surface. The corresponding boundary element solution system is then formulated. Non-Uniform Rational B-Splines (NURBS) are employed as shape functions to accurately describe the geometric boundaries and approximate the unknown physical fields. This method ultimately produces the discrete equations governing nonlinear liquid sloshing problem in an oscillating container. Compared with traditional polynomial interpolation shape functions, NURBS provide improved continuity both within elements and across element interfaces as well as local support. These properties make them particularly suitable for satisfying the continuity requirements of the liquid surface. For time integration, a second-order Runge–Kutta algorithm is employed for time-stepping to solve the IGABEM system equations, compute variable gradients at each time step, and update the computational grid in real-time. A series of numerical examples are presented, the results are compared with analytical solutions, experimental data, and alternative numerical methods for free and forced liquid sloshing, free surface fluctuations and internal pressures. These comparisons validate the accuracy and robustness of the proposed method. The numerical examples further investigate the effects of external excitation frequency, excitation amplitude, rotation center position, and bottom obstacle height on liquid sloshing responses in the rectangular container. The results indicate that changes in excitation frequency, vertical eccentricity of the rotation center, and obstacle height significantly influence the liquid sloshing behavior.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"217 ","pages":"Article 104371"},"PeriodicalIF":5.7,"publicationDate":"2025-12-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"144865083","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}