International Journal of Engineering Science最新文献

{"title":"Multiscale modeling of transient problems in periodic Cauchy materials: Asymptotic and spectro-hierarchical homogenization","authors":"Alessandro Fortunati ,&nbsp;Francesca Fantoni ,&nbsp;Andrea Bacigalupo","doi":"10.1016/j.ijengsci.2025.104460","DOIUrl":"10.1016/j.ijengsci.2025.104460","url":null,"abstract":"<div><div>This work presents a detailed and systematic analytical investigation of the transient elastic wave propagation in two-dimensional periodic heterogeneous composites. The study is conducted through two complementary methodologies: asymptotic homogenization and a recently proposed spectro-hierarchical approach, specifically designed to resolve higher-order microstructural effects. The asymptotic homogenization method derives effective macroscopic equations that accurately capture the averaged behavior of the periodic microstructure, providing a reduced-order but reliable representation of long-wave and low-frequency dynamics. In parallel, the spectro-hierarchical approach systematically reconstructs microstructural fluctuations using a combination of truncated Fourier expansions and a hierarchical sequence of differential problems, allowing the recovery of both first-order homogenized responses and higher-order corrections due to local heterogeneities. The analysis considers both zero and non-zero initial conditions, enabling the study of general transient excitations, including short-time dynamics and localized disturbances, rather than merely steady-state or frequency-limited responses.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"221 ","pages":"Article 104460"},"PeriodicalIF":5.7,"publicationDate":"2026-01-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940350","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":"Mechanical characterization and visco-hyperelastic modeling of epithelial cells: Pressure-rate dependency of the apparent elastic modulus","authors":"Enzo Brito ,&nbsp;Claudio García-Herrera ,&nbsp;Blanca González-Bermúdez ,&nbsp;Gustavo R. Plaza ,&nbsp;Diego Celentano ,&nbsp;Bernardo J. Krause ,&nbsp;Aldo Abarca-Ortega","doi":"10.1016/j.ijengsci.2025.104459","DOIUrl":"10.1016/j.ijengsci.2025.104459","url":null,"abstract":"<div><div>In this study, an experimental and numerical characterization of the viscohyperelastic behavior of suspended epithelial ARPE-19 cells is carried out using the micropipette aspiration technique, with particular emphasis on the evaluation of two viscoelastic models with different mathematical formulations, which were implemented in an in-house finite element code. The tests, conducted under one and two-ramp aspiration protocols, revealed variations in the measured mechanical properties of the cells, which are first sensitive to the applied pressure levels; This dependency is attributed to the internal organization of subcellular components. Second, the aspiration tests show that the apparent elastic modulus is dependent to the applied pressure rate. Two visco-hyperelastic models were evaluated to replicate the experimentally observed behavior. Although both models successfully fit the results, the LM model proved to be more efficient, requiring fewer parameters and enabling a clearer physical interpretation of the viscoelastic properties. In the numerical calculations, a time- and geometry-dependent load function was implemented, which optimally replicated the experimental observations while maintaining low computational cost.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"221 ","pages":"Article 104459"},"PeriodicalIF":5.7,"publicationDate":"2026-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940292","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 the classical and constrained theories for preventing self-intersection in orthotropic nonlinear elasticity","authors":"Adair R. Aguiar ,&nbsp;Thomas J. Pence ,&nbsp;Lucas A. Rocha","doi":"10.1016/j.ijengsci.2025.104452","DOIUrl":"10.1016/j.ijengsci.2025.104452","url":null,"abstract":"<div><div>We investigate the local injectivity requirement <span><math><mrow><mo>det</mo><mi>F</mi><mo>&gt;</mo><mn>0</mn></mrow></math></span>, where <span><math><mi>F</mi></math></span> is the deformation gradient, in the context of both the classical nonlinear elasticity theory and a constrained energy minimization theory with the explicit constraint <span><math><mrow><mo>det</mo><mi>F</mi><mo>≥</mo><mi>ɛ</mi></mrow></math></span>, where <span><math><mrow><mn>0</mn><mo>&lt;</mo><mi>ɛ</mi><mo>&lt;</mo><mn>1</mn></mrow></math></span>. In the classical theory, the condition <span><math><mrow><mo>det</mo><mi>F</mi><mo>&gt;</mo><mn>0</mn></mrow></math></span> is guaranteed by Ball’s theorem provided that appropriate growth conditions are satisfied. For orthotropic hyperelastic solids, we consider equilibrated states of finite plane strain for which the principal axes of strain align with the axes of orthotropic symmetry. Two materials are considered: an orthotropic St. Venant–Kirchhoff material as considered in previous work, and an orthotropic compressible Mooney–Rivlin material. Basic issues are revealed by considering homogeneous plane strain deformation with applied in-plane uniaxial loading. In the absence of the condition <span><math><mrow><mo>det</mo><mi>F</mi><mo>&gt;</mo><mn>0</mn></mrow></math></span>, the St. Venant–Kirchhoff material permits complete volume loss, and hence material overlap, at zero applied load. The Mooney–Rivlin material has no such issue, although it exhibits stress–strain nonmonotonicity for certain parameter values. Material overlap for the St. Venant–Kirchhoff material is remedied by imposing the constraint <span><math><mrow><mo>det</mo><mi>F</mi><mo>≥</mo><mi>ɛ</mi></mrow></math></span> and many features of the corresponding stress–strain behavior are then found to mirror that of the unconstrained Mooney–Rivlin material. The homogeneous deformation study serves as a prelude to the investigation of a nonhomogeneous deformation problem, that of a radially reinforced annular disk that is fixed on its inner radius and subjected to uniform pressure on its outer radius. The problem is solved both as a boundary value problem using a phase-plane technique and via direct minimization using nonlinear programming tools. For each material model, the two procedures give indistinguishable results. Sufficiently high applied pressures yield non-smooth deformations inside the disk. Solutions for the unconstrained Mooney–Rivlin material obtain close agreement with those for the constrained St. Venant material as <span><math><mi>ɛ</mi></math></span> tends to zero.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"221 ","pages":"Article 104452"},"PeriodicalIF":5.7,"publicationDate":"2026-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940291","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":"Inclined mode-I elliptic crack problem in one-dimensional hexagonal quasicrystals","authors":"Haining Liu ,&nbsp;Ruifeng Zheng ,&nbsp;Zichen Deng ,&nbsp;Haimin Yao","doi":"10.1016/j.ijengsci.2025.104458","DOIUrl":"10.1016/j.ijengsci.2025.104458","url":null,"abstract":"<div><div>This article investigates an inclined elliptic crack problem in one-dimensional (1D) hexagonal quasicrystals (QCs). The crack lies in a plane perpendicular to the transversely isotropic plane, and its orientation (the major axis of the ellipse) forms an arbitrary angle with the quasi-periodic axis of the QCs. A pair of uniform normal loading is applied symmetrically on the crack surfaces. Using the potential theory method, the governing equation is established and the phonon–phason field is obtained in terms of simple integrals. The fracture parameters including the crack opening displacement (COD) and the stress intensity factor (SIF) are derived. Numerical results validate the solutions and investigate the effects of the phason field, inclination angle and eccentricity on the fracture parameters. A simplified explicit expression for the SIF is developed via symbolic regression. This machine learning-based model offers an efficient and accurate computational alternative to complex theoretical solutions. As a model problem within the framework of QC elasticity theory, the present study offers insights into the fracture behavior of 1D hexagonal QCs and is expected to provide a theoretical reference for structural integrity evaluation and fracture-resistant design of QC materials.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"221 ","pages":"Article 104458"},"PeriodicalIF":5.7,"publicationDate":"2026-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940293","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":"Asymptotic continualisation of high-contrast lattices and the interpretation of gradient elasticity","authors":"J. Kaplunov ,&nbsp;L. Nazarenko ,&nbsp;H. Altenbach","doi":"10.1016/j.ijengsci.2025.104456","DOIUrl":"10.1016/j.ijengsci.2025.104456","url":null,"abstract":"<div><div>The basic concepts of gradient elasticity are interpreted by developing an asymptotic continualisation procedure for high-contrast lattices. As an example, a two-spring axial lattice supporting both direct and indirect interactions is considered, assuming the stiffness of the string related to the latter is much greater. In this case, the length scale of gradient phenomena considerably exceeds the distance between lattice nodes ensuring a continuous approximation. At leading order, it is given by a fourth-order singular perturbed equation degenerating to a second-order one, which is typical of the canonical asymptotic setup. It is shown that the gradient behaviour may also be incorporated by imposing effective boundary conditions for the mentioned second-order equation. The accuracy of the derived continuous framework is illustrated by comparison with the exact discrete solution.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"221 ","pages":"Article 104456"},"PeriodicalIF":5.7,"publicationDate":"2026-01-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940299","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":"Weakly nonlinear dynamics of a thin aerogel coating governed by Rajagopal’s continuum model","authors":"Weibo Xiong ,&nbsp;Danila Prikazchikov ,&nbsp;Rasul Abdusalamov ,&nbsp;Mikhail Itskov","doi":"10.1016/j.ijengsci.2025.104451","DOIUrl":"10.1016/j.ijengsci.2025.104451","url":null,"abstract":"<div><div>This paper addresses a dynamic problem for a thin aerogel layer with one face fixed and a time-harmonic vertical displacement prescribed on the opposite face. The constitutive relations rely on Rajagopal’s nonlinear implicit model. To validate the material parameters, we conduct uniaxial compression experiments on organic–inorganic hybrid silica aerogels, confirming the predictive capability of the proposed model. A weakly nonlinear asymptotic analysis is conducted and the associated two-term approximate solution is obtained, for both the one-dimensional problem for transverse displacement and the plane-strain problem. Comparisons with numerical solutions are performed, highlighting the importance of the nonlinear corrector. The integrated approach involving asymptotic analysis, numerical investigations, and experimental characterization advances the understanding of the dynamic behaviour of aerogels and paves the way for the design of aerogel-based insulation applications.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"221 ","pages":"Article 104451"},"PeriodicalIF":5.7,"publicationDate":"2026-01-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145940294","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":"Poroelasticity in the presence of active fluids","authors":"R. Cavuoto ,&nbsp;S. Scala ,&nbsp;A. Cutolo ,&nbsp;G. Mensitieri ,&nbsp;M. Fraldi","doi":"10.1016/j.ijengsci.2025.104457","DOIUrl":"10.1016/j.ijengsci.2025.104457","url":null,"abstract":"<div><div>This work presents a model for characterizing porous, deformable media embedded with magnetorheological fluids (MRFs). These active fluids exhibit tunable mechanical and rheological properties that can be controlled through the application of a magnetic field, which induces a phase transition from a liquid to a solid-like state. This transition profoundly affects both stress transmission and fluid flow within the composite, leading to a behaviour governed by a well-defined threshold that depends on the ratio between the pore size and the characteristic size of clusters of magnetic particles, and can be triggered by adjusting the magnetic field intensity. These effects were confirmed through an experimental campaign conducted on a prototype composite obtained by imbibing a selected MRF into commercial sponges. To design and optimize this new class of materials, a linear poroelastic formulation is proposed and validated through comparison with experimental results. The constitutive relationships, i.e. overall elastic constitutive tensor and permeability, of the model are updated from phenomenological observations, exploiting the experimental data obtained for both the pure fluid and the composite material. The findings demonstrate that the proposed simplified formulation is sufficiently robust to predict and optimize the behaviour of porous media containing MRFs. Such materials hold significant promise for a wide range of engineering applications, including adaptive exosuits for human tissue and joint rehabilitation, as well as innovative structural systems.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"221 ","pages":"Article 104457"},"PeriodicalIF":5.7,"publicationDate":"2026-01-06","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145902765","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":"Numerical reproduction of physiological flow conditions in complex vessel system of cerebral arteries with a porosity based method","authors":"Michał Tomaszewski ,&nbsp;Michał Kucewicz ,&nbsp;Radosław Rzepliński ,&nbsp;Marcin Paturalski ,&nbsp;Jerzy Małachowski ,&nbsp;Bogdan Ciszek","doi":"10.1016/j.ijengsci.2025.104455","DOIUrl":"10.1016/j.ijengsci.2025.104455","url":null,"abstract":"<div><div>This paper introduces an innovative approach to modelling boundary conditions for blood flow simulations in arteries with highly complex geometries and multiple outlets. In cases where the arterial cross-section varies significantly, employing analytical models like Windkessel to represent tissue resistance becomes particularly challenging. In this study, we propose a novel approach that combines a porosity model, which induces a pressure drop, with physiological outlet pressures to achieve realistic hemodynamic conditions in blood vessels. The total proportion of blood flow through the perforators was approximately 7.2 % for the BA and 11.6 % for the MCA, while maintaining physiological velocity values in the subsequent branches. The proposed method stands out for its relative simplicity in determining porous body parameters for outlets of varying diameters by quasi-iteratively adjusting two key values of the Power Law model. A major advantage of this approach is its accessibility to non-experts in fluid mechanics, as it does not require complex model reductions to 1D. The study also examines key parameters influencing artery remodelling processes, specifically wall shear stress divergence (WSSD). Furthermore, preliminary histopathological analyses confirm that regions with low WSSD exhibit structural changes in the vessel wall, leading changes similar to intimal hyperplasia. The original data such as DICOM images, artery geometry and domain mesh for the individual representations, together with UDF files for the initial boundary conditions, have been included in the Mendeley database: DOI: 10.17632/5vxtmcwr64.3 and basilar artery model in DOI: 10.17632/ng9mrrn2r7.3.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"221 ","pages":"Article 104455"},"PeriodicalIF":5.7,"publicationDate":"2026-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145883846","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":"Investigation of hemodynamics in bypass grafts for left anterior descending coronary artery revascularization: Biaxial tension tests and fluid-structure interaction simulation","authors":"Alireza Behrouz Jazi,&nbsp;Aisa Rassoli","doi":"10.1016/j.ijengsci.2025.104462","DOIUrl":"10.1016/j.ijengsci.2025.104462","url":null,"abstract":"<div><div>Coronary artery occlusion is one of the most common cardiovascular diseases. In severe cases, bypass surgery is employed as a treatment, wherein a vessel is used as a bypass graft to restore blood flow by connecting the graft to the area beyond the coronary artery blockage. However, since these vessels are prone to reocclusion over time, investigating the hemodynamics of bypass flow is essential. In this study, samples of the three most common grafts, namely the saphenous vein, mammary artery, and radial artery, were obtained. Biaxial tension tests were performed on them to extract their anisotropic hyperelastic properties, which were then used in fluid-structure interaction (FSI) simulations. The results of the biaxial tension tests indicated that the saphenous vein exhibited significant stiffness compared to the other two grafts. The simulations also showed better wall shear stress distribution and higher blood flow velocities within the mammary artery. The saphenous vein exhibited large stresses and displacements at critical attachment points in both the fluid and solid domains, which may, over time, cause damage to the graft attachment and disrupt graft performance. The time average wall shear stress (TAWSS) in the toe region of the attachment area was 7.21 Pa for the saphenous vein, 5.99 Pa for the radial artery, and 3.05 Pa for the mammary artery. Additionally, the maximum displacement in the saphenous vein was 0.416 mm, 0.323 mm in the mammary artery, and 0.157 mm in the radial artery. The results of this research have potential applications in clinical cardiovascular studies and contribute to the development of practical treatment approaches.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"221 ","pages":"Article 104462"},"PeriodicalIF":5.7,"publicationDate":"2026-01-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145883847","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":"Dynamics of curved domain walls in hexagonal magnetostrictive materials with nonlinear dissipation and Rashba effects","authors":"Ambalika Halder ,&nbsp;Sharad Dwivedi ,&nbsp;Shruti Dubey","doi":"10.1016/j.ijengsci.2025.104461","DOIUrl":"10.1016/j.ijengsci.2025.104461","url":null,"abstract":"<div><div>This study presents an analytical investigation of the dynamics of curved domain walls in a bilayer magnetostrictive–piezoelectric heterostructure, using the extended Landau–Lifshitz–Gilbert equation. The system comprises a thin magnetostrictive layer perfectly bonded to the upper surface of a thick piezoelectric layer. We consider a transversely isotropic hexagonal class of magnetostrictive materials that exhibit structural inversion asymmetry. Our analysis accounts for the coupled effects of external magnetic fields, spin-polarized electric currents, magnetoelastic interactions, magnetocrystalline anisotropy, Rashba spin–orbit fields, and nonlinear viscous-dry friction dissipation mechanisms. Employing the reductive perturbation technique, we derive explicit analytical expressions for key dynamic parameters, such as the velocity, mobility, threshold, and breakdown conditions of the domain wall motion in the steady state. Our results reveal the intricate interplay between mean curvature, Rashba field, magnetoelastic coupling, and nonlinear dissipation, which collectively govern the propagation of domain walls in the magnetostrictive layer. Further, we numerically illustrate the analytical results obtained for curved domain walls on constant-curvature surfaces, such as planes, spheres, and cylinders. The results derived here demonstrate good qualitative alignment with recent studies.</div></div>","PeriodicalId":14053,"journal":{"name":"International Journal of Engineering Science","volume":"220 ","pages":"Article 104461"},"PeriodicalIF":5.7,"publicationDate":"2025-12-31","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"145880985","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}